Maharashtra Board Class 5 EVS Part 1 Chapter 1 Our Earth and Our Solar System Solutions

5th Standard EVS 1 Lesson Number 1 Question Answer Our Earth And Our Solar System Maharashtra Board

Std 5 EVS 1 Chapter 1 Question Answer

Question 1. What's the solution? One of the asteroids have fallen out of its place in the asteroid belt and is hurling towards the sun. Our earth is in its way and there is all likelihood of a collision. What can be done to prevent this collision?
Answer: To prevent a collision with an asteroid heading towards Earth, scientists would first track its path very precisely using telescopes and radar. If a collision is confirmed, various methods could be considered, such as using a spacecraft to gently push the asteroid off course (a "gravitational tractor"), or in extreme cases, using a kinetic impactor to change its trajectory. Early detection is crucial for any successful intervention, allowing more time to plan and execute a deflection mission.
In simple words: Scientists would first track the asteroid carefully. If it's going to hit Earth, they might send a spacecraft to gently push it away or hit it to change its path. Finding it early gives us more time to act.

🎯 Exam Tip: When asked about solutions to scientific problems, remember to include steps like detection, analysis, and potential intervention methods. Emphasize the importance of early action.

2. Use Your Brain Power:

Question 1. What will happen to our solar system if the sun were to suddenly disappear?
Answer: 1. If the sun were to suddenly disappear all life forms on earth will cease, because the sun is a source of light and heat. 2. There will be complete darkness on all planets. 3. The planets will move from their orbits and may clash against each other. This catastrophic event would fundamentally alter the conditions necessary for life and planetary stability.
In simple words: If the sun vanished, Earth would become dark and cold, and all planets would fly off into space, likely crashing into each other.

🎯 Exam Tip: When answering hypothetical 'what if' questions, always consider the immediate and long-term consequences across multiple aspects like light, heat, and gravitational forces.

Question 2. Suppose you want to give your address to a friend you have on the planet mars. How will you write your address if you want them to understand exactly where you live?

3. Look At The Picture Of The Solar System And Answer The Following Questions:

Question (a) Which planet is nearest to the Sun?
Answer: Mercury. Mercury is the smallest planet in our solar system and orbits closest to the Sun.
In simple words: Mercury is the planet closest to the Sun, making it very hot.

🎯 Exam Tip: Remember the order of planets from the Sun to easily answer questions about their positions.

Question (b) At what position is the earth from the Sun?
Answer: Third. Earth is the third planet from the Sun, making it uniquely positioned to support life.
In simple words: Earth is the third planet away from the Sun.

🎯 Exam Tip: Knowing the sequence of planets is crucial for solar system questions.

Question (c) Which planet is placed between the earth and mercury?
Answer: Venus. Venus, often called Earth's 'sister planet' due to its similar size, is located between Mercury and Earth.
In simple words: Venus is the planet found between Mercury and Earth.

🎯 Exam Tip: Visualizing the solar system or recalling the planetary order helps identify planets between others.

Question (d) Name the planets beyond the orbit of Mars in serial order.
Answer: Jupiter, Saturn, Uranus and Neptune. These gas giants are fascinating to study.
In simple words: The planets after Mars, in order, are Jupiter, Saturn, Uranus, and Neptune.

🎯 Exam Tip: Remember the order of planets from the sun, and specifically which ones are beyond Mars, as this is a common knowledge question.

Question (e) Which planet in the Solar System is furthest from the sun?
Answer: Neptune. Neptune is the planet furthest from the sun, making it very cold and distant.
In simple words: Neptune is the planet that is farthest away from the sun in our solar system.

🎯 Exam Tip: Knowing the order of planets helps identify the furthest one. Neptune is the eighth and outermost known planet.

4. Who Am I?

Question (a) You can see me from the earth but the lighted part of me that you see changes every day.
Answer: The moon. The moon's phases change daily as it orbits Earth and reflects sunlight.
In simple words: This describes the Moon, which we see from Earth with its changing phases.

🎯 Exam Tip: When answering "Who am I?" questions, identify key characteristics like light source, orbit, and appearance to pinpoint the correct celestial body.

Question (b) I have my own light. It is only from me that the planets get light and heat.
Answer: The sun. The sun is a star that generates its own light and heat through nuclear fusion.
In simple words: This describes the Sun, which gives light and heat to all the planets.

🎯 Exam Tip: Understand the difference between objects that produce their own light (stars) and those that reflect light (planets, moons).

Question (c) I turn around myself, around a planet and also around a star.
Answer: Satellite. A satellite, like the Moon, rotates on its axis, orbits a planet, and together with the planet, orbits a star.
In simple words: This describes a satellite, which spins, goes around a planet, and also travels around a star with its planet.

🎯 Exam Tip: Remember that natural satellites (moons) orbit planets, and planets in turn orbit stars, making the satellite's motion complex.

Question (d) I turn around myself and revolve around the Sun.
Answer: Planet. Planets rotate on their axis and revolve in an elliptical orbit around the sun.
In simple words: This describes a Planet, which spins on its own axis and travels around the Sun.

🎯 Exam Tip: Distinguish between rotation (spinning on axis) and revolution (orbiting another body) when describing celestial movements.

Question (e) No other planet has a living world like mine.
Answer: Earth. This unique planet supports a vast array of life forms due to its suitable conditions.
In simple words: Earth is the only planet known to have life.

🎯 Exam Tip: When identifying planets, remember Earth's unique characteristic of supporting life, which is often a key distinguishing feature.

Question (f) I am the nearest star to the earth.
Answer: The sun. It provides light and heat essential for life on Earth, making it our primary energy source.
In simple words: The sun is the closest star to Earth.

🎯 Exam Tip: Always remember that the Sun is a star, not a planet, and it's the closest one to our Earth.

5.

Question (a) For what purpose are rockets used in space travel?
Answer: 1. Very powerful rockets are used to send a spacecraft into space. These rockets are engineered to overcome Earth's strong gravitational pull.
2. A tremendous quantity of fuel is burnt in rockets so that spacecraft weighing thousands of tons may be launched into space.
In simple words: Rockets are used to launch heavy spacecraft into space by burning a lot of fuel to generate enough thrust.

🎯 Exam Tip: When explaining rocket usage, focus on their power to overcome gravity and the need for massive fuel consumption to launch heavy payloads.

Question (b) What information do man-made satellites provide?
Answer: 1. Man made satellites provide useful information on agriculture, environment, weather, forecasting, making maps and searching for water and mineral wealth on the earth. They are crucial for global monitoring and data collection.
2. It is also used for telecommunication.
In simple words: Satellites give us information about weather, farming, maps, natural resources, and enable communication like phone calls and internet.

🎯 Exam Tip: List diverse applications of satellites, categorizing them into monitoring (weather, environment, resources) and communication to ensure a comprehensive answer.

Environmental Studies Part 1 Standard 5th Solutions Chapter 1 Our Earth And Our Solar System Additional Important Questions And Answers

Fill In The Blanks With The Correct Answers From The Options Given Below:

Question 1. The heavenly bodies that twinkle are called .......................... .
(a) earth
(b) moon
Answer: stars
In simple words: Stars are the celestial objects that appear to twinkle in the night sky.

🎯 Exam Tip: Remember that planets shine steadily, while stars appear to twinkle due to atmospheric interference, a key distinction in astronomy.

Question 2. Satellites and planets get their light from the .......................... .
(a) asteroids
(b) pluto
(c) sun
Answer: (c) sun
In simple words: Satellites and planets don't make their own light; they reflect light from the sun, which is like a giant lamp in our solar system.

🎯 Exam Tip: Remember that the sun is the primary source of light and energy for all celestial bodies in our solar system, including planets and their natural satellites.

Question 3. The heavenly body closest to the earth is .......................... .
(a) sun
(b) moon
(c) mercury
Answer: (b) moon
In simple words: The Moon is Earth's natural satellite and is the closest heavenly body to us, making it appear large in the night sky.

🎯 Exam Tip: Distinguish between planets, stars, and satellites. The Moon is a natural satellite of Earth, and its proximity makes it a common answer for "closest heavenly body."

Question 4. .......................... is an important Indian space mission on Mars.
(a) Chandrayaan -1
(b) Mangalyaan
(c) Marsyaan
Answer: (b) Mangalyaan
In simple words: Mangalyaan, also known as the Mars Orbiter Mission, was India's first successful mission to Mars, showcasing the country's space capabilities.

🎯 Exam Tip: Be familiar with key Indian space missions and their objectives. Chandrayaan is related to the Moon, while Mangalyaan is related to Mars.

Question 5. Scientists who travel in the spacecraft are called .......................... .
(a) astronauts
(b) researchers
(c) engineers
Answer: (a) astronauts
In simple words: Astronauts are specially trained individuals who travel into space aboard spacecraft to conduct research and explore.

🎯 Exam Tip: Know the specific terms for professionals in different fields. An astronaut is the correct term for someone who travels in space, distinct from researchers or engineers who might work on space projects from Earth.

Question 6. .................... became the first Indian astonaut to go in space.
(a) Kalpana Chaivla
(b) Rakesh Sharma
(c) Sunita Williams
Answer: (b) Rakesh Sharma
In simple words: Rakesh Sharma was the first Indian to travel into space, making history for the country.

🎯 Exam Tip: Remember key historical figures and their achievements, especially firsts in their field, as these are common general knowledge questions.

Question 7. .................... have their own light.
(a) Stars
(b) Planets
(c) Asteroids
Answer: (a) Stars
In simple words: Stars are giant balls of hot gas that produce their own light and heat, unlike planets or asteroids which reflect light.

🎯 Exam Tip: Understand the basic characteristics of celestial bodies; stars emit light, while planets and asteroids reflect it.

Question 8. The Sun is a .................... .
(a) planet
(b) star
(c) satellite
Answer: (b) star
In simple words: The Sun is a star, a massive ball of hot plasma that generates light and heat through nuclear fusion, making it the center of our solar system.

🎯 Exam Tip: The Sun is often mistakenly called a planet, but it's crucial to remember it's a star because it produces its own light and energy.

Question 9. The heavenly bodies that do not twinkle are called .................... .
(a) planets
(b) stars
(c) rockets
Answer: (a) planets
In simple words: Planets appear to shine steadily without twinkling because they are closer to Earth and their light isn't as affected by our atmosphere as the light from distant stars.

🎯 Exam Tip: The twinkling effect is due to atmospheric interference; closer objects like planets appear steady, while distant stars twinkle.

Question 10. ............ do not have their own light.
(a) stars
(b) planets
(c) bulbs
Answer: (b) planets
In simple words: Planets reflect light from stars, they don't produce their own light. Bulbs are man-made light sources, and stars are celestial bodies that emit light.

🎯 Exam Tip: Remember the key difference: stars shine, planets reflect. This is a fundamental concept in astronomy.

Question 11. Plants get their light from the ....................
(a) rockets
(b) asteroids
(c) stars
(d) sun
Answer: (d) sun
In simple words: The sun is the primary star in our solar system, providing the light and energy essential for plants to grow through photosynthesis.

🎯 Exam Tip: When answering questions about Earth's natural processes, the sun is almost always the correct source of light and energy.

Question 12. Our earth is a ....................
(a) satellite
(b) moon
(c) planet
Answer: (c) planet
In simple words: Earth is a celestial body that orbits the sun, making it a planet. A moon is a natural satellite that orbits a planet.

🎯 Exam Tip: Understand the definitions: a planet orbits a star, a satellite (like the moon) orbits a planet. Earth fits the definition of a planet.

Question 13. The earth's movement around the sun is called the ........... of the earth.
(a) revolution
(b) rotation
(c) motion
Answer: (a) revolution
In simple words: Revolution is the term for a celestial body's orbit around another, like Earth going around the sun, which causes seasons. Rotation is when it spins on its own axis, causing day and night.

🎯 Exam Tip: Distinguish between 'revolution' (orbiting another body) and 'rotation' (spinning on its own axis) as these terms are often confused.

Question 14. Besides earth, there are ............ other planets which revolves around the sun.
(a) two
(b) one
(c) seven
Answer: (c) seven
In simple words: Our solar system has eight planets in total, so besides Earth, there are seven other planets orbiting the sun.

🎯 Exam Tip: Remember the total number of planets in our solar system (8) and subtract Earth to find the number of other planets.

Question 15. The pathway along which the planets move around the sun is known as the planet's
(a) track
(b) orbit
(c) asteroid
Answer: (b) orbit
In simple words: An orbit is the specific curved path that a planet or any celestial body follows as it goes around another, larger body like the sun.

🎯 Exam Tip: The term "orbit" is crucial in astronomy; it describes the regular, repeating path of one celestial body around another due to gravity.

Question 16. The sun and the planets that revolve around it are together called the ............ system.
(a) satellite
(b) solar
(c) universal
Answer: (b) solar
In simple words: The "solar system" refers to the sun and all the celestial objects, including planets, that are bound by its gravity and orbit around it.

🎯 Exam Tip: The word "solar" directly relates to the sun, so "solar system" is the correct term for the sun and its orbiting bodies.

Question 17. Some heavenly bodies that revolve around the planets are called ...................
(a) sun
(b) moon
(c) satellites
Answer: (c) satellites
In simple words: Satellites are smaller celestial bodies that orbit around larger planets, just like our Moon orbits Earth.

🎯 Exam Tip: Natural satellites are often called moons, but the general term for any body orbiting a planet is a satellite, which can be natural or artificial.

Question 18. The ............ revolves around the earth.
(a) sun
(b) moon
(c) planets
Answer: (b) moon
In simple words: The moon is Earth's natural satellite and travels in an orbit around our planet.

🎯 Exam Tip: Remember that the moon orbits the Earth, while the Earth orbits the sun.

Question 19. The moon is the satellite of the ....................
(a) Mars
(b) Saturn
(c) Earth
Answer: (c) Earth
In simple words: A satellite is an object that orbits a planet, and the moon is the natural satellite of Earth.

🎯 Exam Tip: Understand the definition of a satellite and identify which celestial body the Moon orbits.

Question 20. The planets revolve around the ............ along with its satellites.
(a) earth
(b) sun
(c) solar system
Answer: (b) sun
In simple words: All the planets in our solar system, along with their moons, orbit the sun, which is at the center.

🎯 Exam Tip: The sun is the central star of our solar system, and all planets revolve around it.

Question 21. ............ is a well-known dwarf planet.
(a) Pluto
(b) Jupiter
(c) Saturn
Answer: (a) Pluto
In simple words: Pluto was once considered a planet but is now classified as a dwarf planet due to its smaller size and other characteristics.

🎯 Exam Tip: Know the key examples of dwarf planets, with Pluto being the most prominent one.

Question 22. Asteroids also ............ around the sun.
(a) rotate
(b) move
Answer: (b) move
In simple words: Asteroids are small rocky bodies that travel in orbits around the sun, mostly found in the asteroid belt.

🎯 Exam Tip: Remember that asteroids, like planets, are celestial bodies that orbit the sun.

Question 23. Due to the earth's .................... all things on the earth remain on it.
(a) gravity
(b) rotation
(c) revolution
Answer: (a) gravity
In simple words: Gravity is the invisible force that pulls everything towards the Earth's center, which is why things don't float away.

🎯 Exam Tip: Remember that gravity is the force of attraction, while rotation and revolution describe Earth's movements, not the force keeping things on its surface.

Question 24. Very powerful rockets are used to send a spacecraft into .................... .
(a) planets
(b) asteroids
(c) space
Answer: (c) space
In simple words: Rockets are designed to overcome Earth's gravity and launch objects like spacecraft beyond our atmosphere, into the vastness of space.

🎯 Exam Tip: Distinguish between celestial bodies (planets, asteroids) and the environment beyond Earth's atmosphere (space) when discussing rocket destinations.

Question 25. Our country is well-known for the development of its .................... launch technology.
(a) Space
(b) Astronaut
(c) Asteroids
Answer: (a) Space
In simple words: India has made significant advancements in developing technology to launch objects into space, which is crucial for satellites and space missions.

🎯 Exam Tip: When referring to the field of launching objects beyond Earth, "Space" (capitalized) is the appropriate term for the technology involved.

Question 26. Scientists who travel in spacecraft are called
(a) astronauts
(b) asteroids
(c) rockets

What Is The Full Form Of:

Question 1. M. O. M.
Answer: Mars Orbit Mission. This mission was India's first interplanetary mission.
In simple words: M.O.M. stands for Mars Orbit Mission, which was India's mission to Mars.

🎯 Exam Tip: When asked for full forms, ensure you write out each word completely and correctly. Acronyms are common in science and technology.

Question 2. ISRO
Answer: Indian Space Research Organisation. ISRO is India's national space agency, responsible for space exploration and related technologies.
In simple words: ISRO is India's main organization that deals with space research and missions.

🎯 Exam Tip: Knowing the full forms of important national and international organizations is crucial for general knowledge questions.

Question 3. Match the following:
'A'
(1) Rakesh Sharma went to space
(2) Chandrayaan I launched
(3) MOM launched in space
(4) MOM established in an orbit
'B'
(a) 2008
(b) 2014
(c) 1984
(d) 2013
Answer:
(1) Rakesh Sharma went to space - (c) 1984
(2) Chandrayaan I launched - (a) 2008
(3) MOM launched in space - (d) 2013
(4) MOM established in an orbit - (b) 2014
In simple words: Matching questions test your knowledge of specific facts by pairing related items. Always look for keywords in both columns to find the correct connections.

🎯 Exam Tip: For matching questions, draw lines or write down the correct pairs to avoid confusion. Double-check each match before finalizing your answer.

Name The Following

Question 1. Two heavenly bodies.
Answer: The sun and the moon. The sun is a star, and the moon is Earth's natural satellite, both visible in the sky.
In simple words: Two things we see in the sky are the sun and the moon.

🎯 Exam Tip: When asked to name examples, provide two distinct and clear examples.

Question 2. Planets in the solar system.
Answer: Mercury, Venus, Earth, Mars, Jupiter/Saturn, Uranus, and Neptune are the planets in our solar system, each orbiting the sun.
In simple words: The planets in our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

🎯 Exam Tip: Remember the order of the planets from the sun, as it's a common way to list them.

Question 3. Heavenly bodies between Mars and Jupiter.
Answer: Asteroids are small, rocky bodies that orbit the Sun, primarily found in the asteroid belt between Mars and Jupiter.
In simple words: Asteroids are the rocky objects found between the orbits of Mars and Jupiter.

🎯 Exam Tip: The asteroid belt's location between Mars and Jupiter is a key fact to remember.

Question 4. A dwarf planet.
Answer: Pluto is classified as a dwarf planet, known for its icy composition and distant orbit.
In simple words: Pluto is an example of a dwarf planet.

🎯 Exam Tip: Be precise with classifications; Pluto is a dwarf planet, not a full planet.

Question 5. Technology that helps us to travel in space.
Answer: Rocket technology or space launch technology is essential for propelling spacecraft beyond Earth's atmosphere.
In simple words: Rocket technology helps us travel into space.

🎯 Exam Tip: Use specific terms like 'rocket technology' or 'space launch technology' for accuracy.

Answer The Following In One Sentence:

Question 1. What is the solar system?
Answer: The sun and their planets, their satellites, dwarf planets and asteroids that revolve around the sun are together called the solar system. This vast system is bound by gravity.
In simple words: The solar system is everything that orbits the Sun, including planets, moons, and smaller objects.

🎯 Exam Tip: When defining the solar system, remember to include all its main components: the Sun, planets, satellites, dwarf planets, and asteroids, emphasizing their revolution around the Sun.

Question 2. What is known as planet's orbit?
Answer: Every planet in the solar system revolves around the sun along a specific path which is known as planet's orbit. These paths are typically elliptical.
In simple words: A planet's orbit is the specific curved path it follows as it travels around the Sun.

🎯 Exam Tip: Define an orbit as a "specific path" and mention that it's the path a planet takes around the Sun to score full marks.

Question 3. What are satellites?
Answer: Some heavenly bodies which revolves around the planets are called satellites. The Moon is a natural satellite of Earth.
In simple words: Satellites are smaller celestial objects that orbit around larger planets.

🎯 Exam Tip: Remember that satellites are heavenly bodies that specifically orbit planets, distinguishing them from planets that orbit stars.

Question 4. What do you mean by the force of gravity?
Answer: All heavenly bodies exert a force of attraction or a pull on one another, this is called the force of gravity. This fundamental force keeps planets in orbit.
In simple words: Gravity is the invisible force that pulls all heavenly bodies towards each other, like how Earth pulls things down.

🎯 Exam Tip: When explaining gravity, highlight that it's a "force of attraction" or "pull" between heavenly bodies, which is key to understanding its role in the universe.

Question 5. What are heavenly bodies?
Answer: The sun, the moon, the stars, the planets, etc. are all heavenly bodies. These are natural objects visible in the sky.
In simple words: Heavenly bodies are all the natural objects we see in space, like the Sun, Moon, stars, and planets.

🎯 Exam Tip: To answer this question well, list several examples of heavenly bodies to show a comprehensive understanding.

Question 6. What are stars?
Answer: Heavenly bodies that twinkle are called stars. They are massive, luminous spheres of plasma held together by their own gravity.
In simple words: Stars are bright, twinkling objects in the night sky that produce their own light and heat.

🎯 Exam Tip: A simple definition of stars focuses on their twinkling appearance and their nature as heavenly bodies that emit light.

Question 7. Which star is closer than any other star?
Answer: The sun is the star that is closest to us. The Sun is vital for life on Earth, providing light and heat.
In simple words: The Sun is the star closest to Earth, which is why it appears so big and bright to us.

🎯 Exam Tip: Remember that the Sun is a star, and it's our closest star, making it unique in our solar system.

Question 8. What are planets?
Answer: Heavenly bodies that do not twinkle are called planets. Unlike stars, planets reflect light from a star and do not produce their own.
In simple words: Planets are large objects in space that orbit a star and don't twinkle like stars do.

🎯 Exam Tip: Distinguish between stars and planets by their twinkling effect; stars twinkle because of Earth's atmosphere, while planets appear steady.

Question 9. What are the two movements of a planet?
Answer: Planets revolve around a star, even as they rotate around themselves. These two movements are called revolution and rotation, respectively.
In simple words: Planets move in two ways: they spin on their own axis (rotation) and they travel around a star (revolution).

🎯 Exam Tip: Clearly define both rotation (spinning on axis) and revolution (orbiting a star) when asked about planetary movements.

Question 10. What is the revolution of the earth?
Answer: The movement of the earth around the sun is called the revolution of the earth. This journey takes approximately 365 days, forming one year.
In simple words: The Earth's revolution is its journey around the Sun, which takes one year to complete.

🎯 Exam Tip: When defining revolution, always mention that it's the movement around another celestial body, specifically the Sun for Earth.

Question 11. How many planets are there in our solar system?
Answer: Our solar system has eight planets. These planets are diverse in size, composition, and distance from the Sun.
In simple words: There are eight main planets in our solar system that orbit the Sun.

🎯 Exam Tip: State the number clearly and remember that Pluto is now classified as a dwarf planet, not one of the main eight.

Question 12. Name the planets of our solar system.
Answer: The planets of our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. These planets are often remembered using mnemonics to recall their order from the Sun.
In simple words: The eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

🎯 Exam Tip: List all eight planets in their correct order from the Sun to score full marks.

Question 13. Which is the satellite of the Earth?
Answer: The Moon is the natural satellite of the Earth. It orbits our planet and influences tides.
In simple words: The Moon is Earth's only natural satellite, meaning it orbits around our planet.

🎯 Exam Tip: Remember that the Moon is Earth's natural satellite, distinct from artificial satellites launched by humans.

Question 14. What are dwarf planets?
Answer: Some smaller heavenly bodies that revolve around the sun are called dwarf planets. These celestial bodies are smaller than regular planets but still orbit the sun.
In simple words: Dwarf planets are small objects that orbit the sun, but they are not big enough to be considered full planets.

🎯 Exam Tip: When defining celestial bodies, remember to include their key characteristics like size and orbital path.

Question 15. Which dwarf planet is well-known?
Answer: Pluto is a well known dwarf planet, famous for its reclassification from a full planet.
In simple words: Pluto is the most famous dwarf planet, known for once being considered a full planet.

🎯 Exam Tip: For questions asking for specific examples, always provide the most prominent or widely recognized one.

Question 16. What are Asteroids?
Answer: A band of numerous small heavenly bodies are called Asteroids, often found orbiting the Sun in a region between Mars and Jupiter.
In simple words: Asteroids are many small rocky objects that orbit the sun, mostly found between Mars and Jupiter.

🎯 Exam Tip: When defining terms like 'Asteroids', include their composition (small heavenly bodies) and their location (a band/belt).

Question 17. Where are the Asteroids situated?
Answer: The Asteroids are situated between the planets Mars and Jupiter, forming what is known as the asteroid belt.
In simple words: Asteroids are located in a special area called the asteroid belt, which is between the orbits of Mars and Jupiter.

🎯 Exam Tip: Always specify the exact location or region when asked about the position of celestial objects.

Question 18. Why do all the things on the earth remain on it?
Answer: All things on earth remain on it, due to the earth's gravity, which is a powerful invisible force pulling everything towards its center.
In simple words: Everything stays on Earth because of gravity, which is a force that pulls objects towards the Earth's center.

🎯 Exam Tip: When explaining natural phenomena, clearly state the cause and briefly describe its effect.

Question 19. How do we send some object to space?
Answer: To send some object from earth to space, it must be given power against the force of gravity, typically achieved through powerful rockets that generate immense thrust.
In simple words: To send something into space, we need to give it enough power to overcome Earth's gravity, usually with rockets.

🎯 Exam Tip: When describing a process, mention the main challenge (gravity) and the primary method used to overcome it (power/rockets).

Question 20. Which technology is used to send objects into space?
Answer: Rocket technology or space launch technology is used to send objects into space. This advanced technology allows us to explore beyond Earth's atmosphere.
In simple words: We use rockets and special launch systems to send things like satellites and spacecraft into space.

🎯 Exam Tip: Remember to mention both "rocket technology" and "space launch technology" as they are often used interchangeably in this context.

Question 21. What are used to send a spacecraft into space?
Answer: Very powerful rockets are used to send a spacecraft into space. These rockets generate immense thrust to overcome Earth's gravity.
In simple words: Extremely strong rockets are needed to push spacecraft out of Earth's pull and into space.

🎯 Exam Tip: Emphasize the "powerful" aspect of rockets, as their strength is crucial for space travel.

Question 22. What is our country well-known for?
Answer: Our country is well-known for the development of its space launch technology. This achievement showcases our nation's scientific prowess.
In simple words: Our country is famous for making its own technology to launch things into space.

🎯 Exam Tip: When asked about national achievements in space, focus on the "development of space launch technology" as a key highlight.

Question 23. Who are astronauts?
Answer: Some scientists who travel in spacecraft are known as astronauts. These brave individuals conduct research and explore space.
In simple words: Astronauts are scientists who go into space inside spacecraft.

🎯 Exam Tip: Define astronauts by their profession (scientists) and their activity (travel in spacecraft).

Question 24. Who was the first Indian astronaut to go into space?
Answer: Rakesh Sharma was the first Indian astronaut to go into space in 1984. His journey marked a significant milestone for India.
In simple words: Rakesh Sharma was the first person from India to travel to space, and he did it in 1984.

🎯 Exam Tip: Remember both the name "Rakesh Sharma" and the year "1984" for a complete answer.

Question 25. Name two astronauts of Indian origin.
Answer: Kalpana Chawla and Sunita Williams are two astronauts with Indian origin. Both have made significant contributions to space exploration.
In simple words: Kalpana Chawla and Sunita Williams are two famous astronauts who have Indian roots.

🎯 Exam Tip: Be sure to spell the names "Kalpana Chawla" and "Sunita Williams" correctly.

Give Geographical Reasons:

Question 1. During the day we cannot see other stars, besides the Sun.
Answer:

🎯 Exam Tip: When explaining why stars aren't visible during the day, focus on the overwhelming brightness of the Sun's light scattering in the atmosphere.

Question 2. The moon is called a satellite of the earth.
Answer:
1. We see the moon at night.
2. It revolves around the earth.
3. Therefore, it is called a satellite of the earth. The moon's consistent orbit around Earth is what defines it as a natural satellite.
In simple words: The moon is called Earth's satellite because we see it at night and it goes around our planet.

🎯 Exam Tip: When asked to define or explain a term, provide key characteristics or functions.

Question 3. Our Earth is an invaluable planet.
Answer:
1. Space scientists have not yet been able to find a single other planet which has life on it.
2. Therefore, our planet is an invaluable planet. This uniqueness makes Earth a precious and irreplaceable home for all known life forms.
In simple words: Earth is invaluable because it's the only planet we know that has life.

🎯 Exam Tip: Emphasize the unique characteristic (life) when explaining why Earth is invaluable.

Question 4. Though the sun is a star it does not twinkle.
Answer:
1. The sun is a star and it is closer to us than any of the stars.
2. Hence, it appears big and brilliant and does not twinkle like the distant stars. Its proximity means its light rays reach us in a more stable, less distorted way compared to the light from far-off stars.
In simple words: The sun doesn't twinkle because it's very close to us and looks big and bright, unlike tiny, distant stars whose light gets disturbed.

🎯 Exam Tip: Remember that twinkling is an atmospheric effect on distant light sources; closer objects appear steady.

Question 5. The moon appears to be very big.
Answer:
1. Compared to the sun, the other heavenly bodies in the solar system are much smaller.
2. As the moon is closest to the earth, it appears to be very big although it is actually very much smaller than the sun. This optical illusion is a result of its relatively short distance from Earth, making it seem larger than truly massive but more distant objects.
In simple words: The moon looks big because it's the closest heavenly body to Earth, even though it's much smaller than the sun.

🎯 Exam Tip: When explaining apparent size, always consider the object's actual size and its distance from the observer.

Question 6. Satellites revolve around their planets.
Answer:
1. The sun exerts a gravitational pull on all planets whereas the tendency of the planets is to move away from the sun.
2. As a result of these two forces, a planet keeps revolving around the sun at fixed distance, in a fixed orbit.
3. In this way the satellites revolve around their planets. This delicate balance ensures celestial bodies maintain their paths.
In simple words: Planets stay in orbit because the sun pulls them, but they also try to fly away, creating a balance that keeps them moving in a circle. Satellites orbit planets in the same way.

🎯 Exam Tip: When explaining orbital mechanics, mention both gravitational pull and the tendency to move away (centrifugal force) to show a complete understanding.

Question 7. Even if we throw something upward with a great force, it finally falls to the ground.
Answer:
1. All things on the earth remain on it due to the earth's gravity.
2. So, even if we throw something upward with a great force, it finally falls back to the ground. This fundamental force keeps everything grounded.
In simple words: Everything falls back to Earth because of gravity, no matter how hard you throw it up.

🎯 Exam Tip: Always link falling objects directly to the concept of Earth's gravitational pull for a clear and correct answer.

Answer Briefly:

Question 1. What happens to the spacecrafts after the mission is over?
Answer:
1. Some spacecraft remain in space.
2. Others are brought back to earth.
3. Some land on other planets or satellites after the mission is complete. The fate of a spacecraft depends on its mission objectives and design.
In simple words: After a mission, spacecraft either stay in space, return to Earth, or land on other celestial bodies.

🎯 Exam Tip: When discussing spacecraft fates, remember the three main possibilities: remaining in orbit, returning to Earth, or landing elsewhere, as each serves different purposes.

Question 2. Describe Rakesh Sharma's mission to space.
Answer:
1. Rakesh Sharma became the first Indian astronaut to go into space in 1984.
2. He spent eight days.
3. It was a joint mission of the ISRO and the Soviet Intercosmos.
4. Seeing India from space, he said it looked: 'Saare jahan se achha'. His journey marked a significant milestone for India's space program.
In simple words: Rakesh Sharma was the first Indian in space in 1984, spending eight days on a joint mission and famously describing India from space as 'Saare jahan se achha'.

🎯 Exam Tip: For historical figures like Rakesh Sharma, include key details like the year, duration, and any famous quotes to make your answer comprehensive.

Question 3. How are spacecraft launched into space?
Answer: 1. Very powerful rockets are used to send a spacecraft into space. These rockets generate immense thrust to overcome Earth's gravity. 2. A tremendous quantity of fuel is burnt in these rockets so that the spacecraft weighing thousands of tons may be launched into space.
In simple words: Spacecraft are launched using very powerful rockets that burn a lot of fuel to push the heavy spacecraft into space, overcoming Earth's pull.

🎯 Exam Tip: When explaining a process, break it down into logical steps, like the role of rockets and fuel in space launches.

Question 4. What are the uses of man-made satellites?
Answer: 1. Man-made satellites provide useful information for agriculture, environment, weather forecasting, map making and searching for water and mineral wealth on the earth. These versatile tools help us understand and manage our planet better. 2. They are also used for telecommunication.
In simple words: Man-made satellites help us with many things like predicting weather, making maps, finding resources, and enabling phone calls and internet across the world.

🎯 Exam Tip: Remember to list diverse applications of satellites, covering both Earth observation and communication aspects.

Write Short Note On:

Question 1. Dwarf planets
Answer: 1. Dwarf planets are smaller heavenly bodies that revolve around the sun. They are distinct from major planets but share some characteristics. 2. The most well known is Pluto. 3. They revolve around the sun independently. 4. They have their own orbit.
In simple words: Dwarf planets are small celestial bodies, like Pluto, that orbit the sun on their own path, but are not big enough to be considered full planets.

🎯 Exam Tip: When writing a short note, include key characteristics and a famous example to make your answer comprehensive.

Question 2. Asteriods
Answer: 1. Small heavenly bodies between the planets Mars and Jupiter are called asteriods. These rocky objects are remnants from the early solar system. 2. They move in a form of a band and are numerous. 3. They revolve around the sun.
In simple words: Asteroids are small, rocky objects found mostly in a belt between Mars and Jupiter, and they orbit the sun.

🎯 Exam Tip: For definitions, always mention their location and key features, such as their size and orbital pattern.

Question 3. Distinguish between stars and planets:
Answer: Stars are celestial bodies that produce their own light and heat through nuclear fusion, while planets are celestial bodies that revolve around a star and reflect its light. Stars are typically much larger and hotter than planets. Planets, unlike stars, do not generate their own energy.
In simple words: Stars make their own light and heat, like our Sun, but planets only shine by reflecting light from a star and orbit around it.

🎯 Exam Tip: When distinguishing between two concepts, create a clear comparison by highlighting their key differences in terms of light, heat, and motion.

Question 4. Give details of Mangalyaan on the basis of the following points:
(a) Another name of Mangalyaan,
(b) Date of launch,
(c) Date of orbiting,
(d) Attempts made to achieve success,
(e) Type of mission,
(f) Objective of the mission.
Answer:
(a) Mass Orbit Mission
(b) 5 November 2013
(c) 24 September 2014
(d) one
(e) unmanned
(f) Deeper study of the moon and mass. This mission was a significant achievement for India's space program.
In simple words: Mangalyaan, also known as the Mars Orbit Mission, was launched on November 5, 2013, and began orbiting Mars on September 24, 2014, succeeding in its first attempt. It was an unmanned mission aimed at studying Mars and its atmosphere.

🎯 Exam Tip: When asked for details about a mission or event, remember to list all specific facts like names, dates, and objectives clearly to score full marks.

Question 5. Through your observation: In which direction do leaves from a tree, rocks from a hillside or rain from the sky fall?
Answer: Due to earth's gravity all things fall down to the ground. This fundamental force keeps everything grounded.
In simple words: Leaves, rocks, and rain all fall downwards towards the ground because of Earth's gravity, which pulls everything towards its center.

🎯 Exam Tip: Always link the phenomenon of falling objects to the concept of Earth's gravity, as it is the primary scientific reason.

1. heavenly – cosmic/celestial.
2. dwarf - small and insignificant in comparison
3. gravity – force that attracts a body towards the centre of the earth.
4. tremendous – very great in amount, scale or intensity.
5. disappear - create to be visible/cease to exist.

Class 5 Environmental Studies Questions And Answers