CBSE Class 3 EVS Water Is Precious Worksheet

CBSE Class 3 EVS Practice Worksheets (72)-Water is Precious

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INTERNATIONAL INDIAN SCHOOL, RIYADH

FINAL TERM -2012

STD. - III

EVS

L – 13 WATER IS PRECIOUS

I Fill in the blanks :

1. Camel’s hump is made of ______________ .

2. ______________ does not have leaves.

3. The ______________ can live without food and water for many days.

4. Cactus makes food in its ______________.

5. The inside of the cactus is filled with ______________ material.

6. ______________ helps us to digest our food.

II Name the following :

1. Ship of the desert ______________

2. One of the most important ways of conserving water ______________

3. A desert plant ______________

III Write True or False :

1. We should keep the tap running while brushing our teeth. ( )

2. Water helps us to eliminate waste matter from our body. ( )

3. Living things do not need water. ( )

4. Water helps to carry food to different parts of the body. ( )

5. Recycling water is another way by which water can be conserved. ( )

IV Choose the Correct Answer :

1. Cactus does not have (stem / leaves)

2. Keep water in (clean / dirty ) area.

3. (water / plants) dissolves nutrients of the soil.

4. Plants and animals living in dry, desert area require ( more / less ) water

I. Fill in the blanks :

Question 1. Camel’s hump is made of ______________ .
Answer: fat
In simple words: The hump of a camel stores fat to give it energy when there is no food.

Exam Tip: Remember that the hump does not store water directly; it stores fat.

Question 2. ______________ does not have leaves.
Answer: Cactus
In simple words: A cactus plant has sharp thorns instead of green leaves.

Exam Tip: Thorns help the cactus save water in dry deserts.

Question 3. The ______________ can live without food and water for many days.
Answer: camel
In simple words: Camels can go a very long time without eating or drinking.

Exam Tip: Camels have special bodies that help them survive in hot, dry places.

Question 4. Cactus makes food in its ______________.
Answer: green stem
In simple words: The thick green stem of a cactus prepares its food.

Exam Tip: Since a cactus lacks normal leaves, its stem does the work of making food.

Question 5. The inside of the cactus is filled with ______________ material.
Answer: watery
In simple words: The inside of a cactus is juicy and stores a lot of water.

Exam Tip: This wet, fleshy material keeps the plant alive during long dry spells.

Question 6. ______________ helps us to digest our food.
Answer: Water
In simple words: Drinking water helps our stomach break down the food we eat.

Exam Tip: Water is very important for keeping our body's digestive system running smoothly.

II. Name the following :

Question 1. Ship of the desert ______________
Answer: Camel
In simple words: The camel is called the ship of the desert because it travels easily on sand.

Exam Tip: Capitalize the first letter of 'Camel' when writing proper names in your answer.

Question 2. One of the most important ways of conserving water ______________
Answer: Rainwater harvesting
In simple words: Collecting and storing rainwater is a great way to save water.

Exam Tip: Saving water is called conservation. Rainwater harvesting is a key method.

Question 3. A desert plant ______________
Answer: Cactus
In simple words: A cactus is a well-known plant that grows in dry deserts.

Exam Tip: Desert plants need very little water to grow and stay alive.

III. Write True or False :

Question 1. We should keep the tap running while brushing our teeth. ( )
Answer: False
In simple words: We must turn off the tap to save water while brushing.

Exam Tip: Leaving the tap open wastes a lot of clean water unnecessarily.

Question 2. Water helps us to eliminate waste matter from our body. ( )
Answer: True
In simple words: Water helps flush out dirty waste from inside our bodies.

Exam Tip: Drinking enough water keeps our kidneys clean and healthy.

Question 3. Living things do not need water. ( )
Answer: False
In simple words: All plants, animals, and humans need water to stay alive.

Exam Tip: Water is a basic necessity for every single living thing on Earth.

Question 4. Water helps to carry food to different parts of the body. ( )
Answer: True
In simple words: Water helps blood move nutrients all around our body.

Exam Tip: Water is the main liquid that carries nutrients through our blood vessels.

Question 5. Recycling water is another way by which water can be conserved. ( )
Answer: True
In simple words: Cleaning dirty water so we can use it again helps us save water.

Exam Tip: Reusing water for gardening or cleaning is a great way to recycle it.

IV. Choose the Correct Answer :

Question 1. Cactus does not have (stem / leaves)
Answer: leaves
In simple words: A cactus has sharp spines instead of normal green leaves.

Exam Tip: Spines are actually modified leaves that help the plant save water.

Question 2. Keep water in (clean / dirty ) area.
Answer: clean
In simple words: We must always store our drinking water in a clean place.

Exam Tip: Storing water in dirty places can let germs in and make us sick.

Question 3. (water / plants) dissolves nutrients of the soil.
Answer: water
In simple words: Water mixes with the good things in soil so plants can drink them.

Exam Tip: Soil nutrients must dissolve in water before plant roots can take them in.

Question 4. Plants and animals living in dry, desert area require ( more / less ) water.
Answer: less
In simple words: Desert plants and animals are used to living with very little water.

Exam Tip: Desert life has special features that help them survive on less water.

Lesson 22: Beaks of Birds

I. Fill in the blanks :

Question 1. The _____________ of a bird is adopted to the kind of food it eats.
Answer: beak
In simple words: A bird's beak is shaped perfectly to help it eat its food.

Exam Tip: Beaks are specialized tools; fruit-eaters have different beaks than meat-eaters.

Question 2. Birds use their beaks to protect themselves from _____________.
Answer: enemies
In simple words: Birds can use their beaks to fight off dangerous animals.

Exam Tip: Beaks serve as a protective weapon when a bird is under threat.

Question 3. Hooked beak also helps a parrot to _____________.
Answer: crack nuts
In simple words: Parrots use their curved beaks to crack open hard nuts.

Exam Tip: A curved, hooked beak gives extra strength to break tough shells.

Question 4. A wood pecker has a sharp _____________ like beak.
Answer: chisel
In simple words: A woodpecker has a strong beak like a chisel to drill wood.

Exam Tip: This sharp beak helps the woodpecker make holes in tree trunks easily.

Question 5. A _____________ has a broad flat and spoon like beak.
Answer: duck
In simple words: Ducks have flat, wide beaks to scoop food from muddy water.

Exam Tip: These flat beaks have tiny holes on the sides to strain out mud.

II. Name the following :

Question 1. Two birds of prey ____________
Answer: Eagle, Vulture
In simple words: Eagles and vultures are strong hunters that eat other animals.

Exam Tip: Birds of prey have sharp, hooked beaks and powerful claws for hunting.

Question 2. Two birds having short hard and pointed beaks __________ _________.
Answer: Sparrow, Pigeon
In simple words: Sparrows and pigeons have small, tough beaks to crush seeds.

Exam Tip: Short, pointed beaks are perfect for cracking open hard grains and seeds.

III. Choose the Correct Answer :

Question 1. (Wood pecker / Duck ) makes hole in the trunk of the tree.
Answer: Wood pecker
In simple words: Woodpeckers drill holes in trees to find insects and build nests.

Exam Tip: Ducks live in water and cannot drill holes in trees with their flat beaks.

Question 2. Birds use (beaks / feathers) to cut, tear open and crush the food they eat.
Answer: beaks
In simple words: Birds do not have teeth, so they use their beaks to eat.

Exam Tip: Feathers are used for flying and keeping warm, not for eating food.

Question 3. Different birds have ( some / different) kinds of beak.
Answer: different
In simple words: Every bird has a unique beak that matches what it eats.

Exam Tip: Different beak shapes show us what kind of food the bird eats.

IV. Write True or False :

Question 1. Birds have teeth. ( )
Answer: False
In simple words: Birds have zero teeth; they use their beaks instead.

Exam Tip: Since birds lack teeth, they must swallow or crush their food using their beaks.

Question 2. Duck has a strong and hooked beak. ( )
Answer: False
In simple words: A duck has a flat, broad beak, not a hooked one.

Exam Tip: Hooked beaks are found on eagles and parrots, not water birds like ducks.

Question 3. We can tell the food that a bird eats by looking at its beak. ( )
Answer: True
In simple words: A bird's beak shape tells us if it eats seeds, fish, or insects.

Exam Tip: Beak shapes are direct indicators of a bird's natural diet.

Lesson 16: Means Of Communication

I. Fill in the blanks:

Question 1. The telephone was invented by_____________.
Answer: Alexander Graham Bell
In simple words: Alexander Graham Bell was the smart inventor who made the very first telephone.

Exam Tip: Always capitalize the names of famous inventors like Alexander Graham Bell.

Question 2. A letter box is _____________ in colour.
Answer: red
In simple words: Letter boxes on the street are painted bright red so we can spot them.

Exam Tip: Red is the standard color used for post boxes in many countries.

Question 3. We use _____________ to send a letter to another country.
Answer: aerogramme
In simple words: An aerogramme is a light, thin letter sheet that we send by air.

Exam Tip: Aerogrammes are specifically designed for international airmail to save weight.

Question 4. We use _____________ to make direct calls with in our country.
Answer: STD
In simple words: We use STD calling to talk directly to friends in other cities.

Exam Tip: STD stands for Subscriber Trunk Dialling, used for long-distance domestic calls.

Question 5. We use _____________ to make direct calls to other countries.
Answer: ISD
In simple words: We use ISD calling when we want to call someone in another nation.

Exam Tip: ISD stands for International Subscriber Dialling, which connects different countries.

Question 6. The radio was invented by _____________.
Answer: Guglielmo Marconi
In simple words: Guglielmo Marconi was the scientist who first sent signals to make the radio.

Exam Tip: Marconi is widely credited with inventing the wireless telegraph and radio systems.

Question 7. The television was invented by _____________.
Answer: John Logie Baird
In simple words: John Logie Baird was the first person to show a working television.

Exam Tip: He demonstrated the first working television system in the 1920s.

Question 8. _____________ and _____________ are the best means of mass communication.
Answer: Television, Radio
In simple words: Television and radio are great because they share news with millions at once.

Exam Tip: Mass communication means sharing information with a very large group of people simultaneously.

Question 9. _____________ is a net work of computers.
Answer: Internet
In simple words: The internet is a giant system that connects computers all over the world.

Exam Tip: The internet allows us to share files, websites, and emails globally.

Question 10. If the_____________ is written clearly along with the ___________ then letter reaches the proper destination quickly.
Answer: address, PIN code
In simple words: Writing the house address and the postal PIN code helps the letter find its way.

Exam Tip: A PIN (Postal Index Number) code is extremely important for sorting letters fast.

Question 11. _____________ phones can be used anywhere and at any time.
Answer: Mobile
In simple words: We can carry mobile phones in our pockets and use them anywhere.

Exam Tip: Unlike old landline phones, mobile phones use wireless signals to connect.

Question 12. _____________ is a computer based global system.
Answer: Internet
In simple words: The internet is a computer system that connects the whole globe.

Exam Tip: Global means it reaches every country on Earth through connected networks.

II. Name the following:

Question 1. STD _______________________________________
Answer: Subscriber Trunk Dialling
In simple words: STD is a system used to call people in other cities in our country.

Exam Tip: Learn the full form with correct spelling to secure full marks.

Question 2. ISD _______________________________________
Answer: International Subscriber Dialling
In simple words: ISD is a system used to make phone calls to other countries.

Exam Tip: Remember that 'International' refers to calling across different nations.

Question 3. E-mail _______________________________________
Answer: Electronic Mail
In simple words: E-mail is a way to send digital letters using the internet.

Exam Tip: It is a much faster alternative to traditional paper mail services.

Question 4. Two means of mass communication _____________ _____________
Answer: Newspaper, Television
In simple words: Newspapers and TV share news with many people at the same time.

Exam Tip: You can also write 'Radio' as a standard example of mass media.

Question 5. Two means of individual communication _____________ _____________
Answer: Telephone, Letter
In simple words: A telephone call or a private letter is used to talk to one person.

Exam Tip: Individual communication means sharing messages between two specific people only.

III. Choose the Correct Answer:

Question 1. We use an ( aerogramme / inland) to send a letter to another country.
Answer: aerogramme
In simple words: We write on a light aerogramme sheet to send letters across the seas.

Exam Tip: An inland letter card is strictly used for sending mail within the same country.

Question 2. We use (STD / ISD) to talk to people living in other countries.
Answer: ISD
In simple words: We must use the ISD code to call relatives living in other countries.

Exam Tip: 'I' stands for International, which tells us it is for foreign countries.

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Question 3. Post cards are means of (mass / individual) communication.
Answer: individual
In simple words: A post card carries a message to one single person.

Exam Tip: Post cards are not meant for mass sharing as they are sent to individual addresses.

Question 4. The radio was invented by (Marconi / Alexander Graham Bell)
Answer: Marconi
In simple words: Marconi invented the radio, and Bell invented the telephone.

Exam Tip: Be sure not to mix up these two famous inventors.

Question 5. A letter box is (blue / red) in colour.
Answer: red
In simple words: Public post boxes are painted red so they are easy to find.

Exam Tip: Red is the traditional color representing postal services in many regions.

IV. Write True or False:

Question 1. We can send messages through fax machine. ( )
Answer: True
In simple words: A fax machine scans and sends paper messages over phone lines.

Exam Tip: Fax stands for facsimile transmission of documents over distances.

Question 2. Education programmes are broadcast over radio / and television. ( )
Answer: True
In simple words: We can watch and listen to learning shows on TV and radio.

Exam Tip: Many governments use public broadcast channels for educational content.

Question 3. E-mail can be sent through radio. ( )
Answer: False
In simple words: We need an internet connection, not a radio, to send an e-mail.

Exam Tip: E-mails rely on computer networks and the internet to travel.

Question 4. Urgent messages can be sent through a telegram. ( )
Answer: True
In simple words: Telegrams were used long ago to send very fast, short messages.

Exam Tip: Telegrams were the fastest way to communicate before modern phones existed.

Lesson 26: Living Things

I. Name the following:

Question 1. Two animals that live in water.
_____________ _____________
Answer: Fish, Whale
In simple words: Fish and whales are animals that live in water.

Exam Tip: Any aquatic animal, like a dolphin or crab, can be used as a correct example.

Question 2. Two animals that crawl on land.
_____________ _____________
Answer: Snake, Lizard
In simple words: Snakes and lizards crawl along the ground to move.

Exam Tip: Crawling animals are typically reptiles with very short legs or no legs at all.

Question 3. Two animals that live on land.
_____________ _____________
Answer: Cow, Lion
In simple words: Cows and lions are animals that live on land.

Exam Tip: Land animals are also called terrestrial animals.

Question 4. Two animals that have horns.
_____________ _____________
Answer: Cow, Goat
In simple words: Cows and goats have hard horns on their heads.

Exam Tip: Horns are used by these animals for defense against predators.

Question 5. The process of making food in plants.
__________________________
Answer: Photosynthesis
In simple words: Photosynthesis is how plants use sunlight to make their own food.

Exam Tip: Learn the spelling of 'Photosynthesis' carefully, as it is a common scientific term.

Question 6. A mammal which lives in water.
__________________________
Answer: Whale
In simple words: Whales are large mammals that swim and breathe in the ocean.

Exam Tip: Dolphins are another excellent example of marine mammals.

Question 7. An animal that breathe through gills.
__________________________
Answer: Fish
In simple words: Fish use their gills to breathe underwater.

Exam Tip: Gills extract dissolved oxygen directly from water for breathing.

Question 8. An animal that can live both land and water.
Answer: Frog
In simple words: A frog can live on dry land and swim in wet water.

Exam Tip: Animals that can live on both land and water are called amphibians.

II. Fill in the blanks :

Question 1. A rose plant is a ___________ thing.
Answer: living
In simple words: A rose plant is a living thing because it grows and breathes.

Exam Tip: All plants are living things just like animals and humans.

Question 2. Plants breathe through ___________ in their leaves.
Answer: stomata
In simple words: Plants use tiny holes in their leaves to breathe in air.

Exam Tip: These tiny breathing pores are called stomata.

Question 3. All living things need ___________ to breathe.
Answer: air
In simple words: Every living thing must have clean air to breathe and live.

Exam Tip: Air contains oxygen, which is needed by all living things to survive.

III. Write True or False :

Question 1. A seed turns into a plant. ( )
Answer: True
In simple words: A tiny seed grows up to become a green plant.

Exam Tip: The process of a seed turning into a plant is called germination.

Question 2. Whale is a mammal. ( )
Answer: True
In simple words: Even though it lives in water, a whale is a mammal.

Exam Tip: Mammals give birth to babies instead of laying eggs.

Question 3. Whale lays eggs. ( )
Answer: False
In simple words: Whales do not lay eggs like fish do.

Exam Tip: Whales are mammals, and mammals give birth to live babies.

Question 4. Whale gives birth to baby whales. ( )
Answer: True
In simple words: A mother whale gives birth directly to her baby.

Exam Tip: Since whales are mammals, they nurse their babies with milk.

Question 5. Living things can feel. ( )
Answer: True
In simple words: All living things can feel changes around them, like heat and cold.

Exam Tip: Living things respond to touch, temperature, and light.

Lesson 28: Soil

I. Fill in the blanks :

Question 1. ___________ is the upper most layer of the earth’s crust.
Answer: Soil
In simple words: Soil is the top layer of ground on our Earth.

Exam Tip: Soil is the thin surface layer that supports plant growth.

Question 2. Soil provides ___________ and ___________ to plants.
Answer: water, minerals
In simple words: Soil gives plants the water and food they need to grow.

Exam Tip: Plants take in water and mineral nutrients from the soil through their roots.

Question 3. ___________ is the best soil for growing plants.
Answer: Loam
In simple words: Loam soil is the best kind of soil for farming and gardening.

Exam Tip: Loam is a rich mix of sand, clay, and organic matter.

Question 4. Soil is formed by the breaking up of ___________.
Answer: rocks
In simple words: Small bits of rocks break down over time to form soil.

Exam Tip: The breaking down of rocks into soil is called weathering.

II. Underline the correct answer :

Question 1. (Gravel / Clay) does not hold water.
Answer: Gravel
In simple words: Gravel has big stones, so water runs right through it.

Exam Tip: Large spaces between gravel stones cannot trap water.

Question 2. (Sand / Loam ) is used to make buildings.
Answer: Sand
In simple words: We mix sand with cement to build strong houses.

Exam Tip: Sand particles are mixed with cement to make concrete for construction.

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Question 3. (Clay / Gravel) is smooth soft and sticky.
Answer: Clay
In simple words: Clay soil feels very soft, smooth, and sticky when wet.

Exam Tip: Clay has very fine particles that pack closely together, making it sticky.

Question 4. (Loam / Gravel) contains both sand and clay.
Answer: Loam
In simple words: Loam is a healthy soil that has both sand and clay.

Exam Tip: Loam is perfect for plants because it combines the benefits of sand and clay.

Question 5. (Top soil / Sub soil ) is dark coloured.
Answer: Top soil
In simple words: Topsoil is dark because it has a lot of rich organic matter.

Exam Tip: Topsoil contains humus, which gives it a rich dark brown color.

III. Write True or False :

Question 1. Clay is used for making buildings. ( )
Answer: False
In simple words: Clay is used for making pots, while sand is used for buildings.

Exam Tip: Sand is mixed with cement to build strong structures.

Question 2. Humus contains the dead remains of plants and animals. ( )
Answer: True
In simple words: Humus is made of old plants and leaves that decayed in soil.

Exam Tip: Humus makes the soil very fertile and rich for crops.

Question 3. Gravel has a lot of humus. ( )
Answer: False
In simple words: Gravel has big rocks and contains no rich organic plant matter.

Exam Tip: Humus is only found in topsoil, not in rocky gravel.

Lesson 29: The Earth And The Moon

I. Write True or False :

Question 1. The earth get its light from the sun. ( )
Answer: True
In simple words: The Earth does not make its own light; it gets light from the Sun.

Exam Tip: The Sun is the main source of natural light for our planet.

Question 2. Seasons are caused due to the rotation of the earth. ( )
Answer: False
In simple words: Rotation causes day and night, while revolution causes seasons.

Exam Tip: Seasons change because the Earth is tilted as it goes around the Sun.

II. Name the following :

Question 1. Two constellations ___________ ___________
Answer: Ursa Major, Orion
In simple words: Constellations are groups of stars that make patterns in the sky.

Exam Tip: Ursa Major (Great Bear) and Orion are two very famous star patterns.

Question 2. Two movements of the earth ___________ ___________
Answer: Rotation, Revolution
In simple words: The Earth spins on its axis and also travels around the Sun.

Exam Tip: Spanning on its axis is rotation, and going around the sun is revolution.

III. Underline the correct answer :

Question 1. When we do not see the lit up face of the moon at all it is called (new moon / half moon)
Answer: new moon
In simple words: We call it a new moon when the night sky is completely dark.

Exam Tip: A new moon marks the beginning of a new lunar cycle.

Question 2. If we see the whole of the lit up face of the moon, it is called ( half moon / new moon )
Answer: full moon
In simple words: We call it a full moon when it looks like a complete, bright circle.

Exam Tip: A full moon happens when the entire lit-up side faces Earth.

Question 3. The moon revolves round the earth once in (27.3 days / 25 days)
Answer: 27.3 days
In simple words: The Moon takes about 27 days to travel completely around the Earth.

Exam Tip: The exact time taken is 27.3 days.

Question 4. (Three fourths / One fourth) of the earth is covered with water
Answer: Three fourths
In simple words: Most of our planet is covered with water.

Exam Tip: About 71% (or three-fourths) of the Earth's surface is water.

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Lesson 30: Our Body

I. Write True or False :

Question 1. More than two thirds of our body is made of water. ( )
Answer: True
In simple words: Most of our body is actually made up of water.

Exam Tip: Water is very important for keeping our body organs working well.

Question 2. There are eight systems in our body. ( )
Answer: True
In simple words: Our body has eight main organ systems that work together.

Exam Tip: These systems include the digestive, respiratory, and skeletal systems.

II. Name the following :

Question 1. The air we breathe in ___________
Answer: Oxygen
In simple words: We breathe in oxygen gas from the fresh air.

Exam Tip: Oxygen is vital for producing energy in our bodies.

Question 2. The air we breathe out ___________
Answer: Carbon dioxide
In simple words: We breathe out carbon dioxide as a waste gas.

Exam Tip: Carbon dioxide is the gas released by our lungs when we exhale.

Question 3. The system which consists of heart and blood vessels ___________
Answer: Circulatory system
In simple words: The circulatory system pumps blood all around our body.

Exam Tip: This system is made up of the heart, blood, and blood vessels.

Question 4. Name the sense organs in our body.
Answer: Eyes, Ears, Nose, Tongue, and Skin
In simple words: We have five sense organs to see, hear, smell, taste, and feel.

Exam Tip: Always list all five sense organs when asked this question.

III. Underline the correct answer :

Question 1. The chest (expands / contracts) when we breathe in.
Answer: expands
In simple words: Our chest gets bigger (expands) when we take a deep breath.

Exam Tip: Inhaling draws air into the lungs, making the chest cavity swell.