Samacheer Kalvi Class 7 Social Science Solutions Term 2 Chapter 1 Resources

I. Choose the correct answer:

Question 1. Which one of the following is renewable resource?
(a) Gold
(b) Iron
(c) Petrol
(d) Solar energy
Answer: (d) Solar energy
In simple words: A renewable resource is something we can use again and again without it running out, like sunshine. Gold, iron, and petrol are not renewable.

🎯 Exam Tip: Remember that renewable resources replenish naturally, while non-renewable ones are finite and take millions of years to form.

Question 2. Where is the largest solar power project situated in India?
(a) Kamuthi
(b) Aralvaimozhi
(c) Muppandal
(d) Neyveli
Answer: (a) Kamuthi
In simple words: The biggest solar power project in India is located in a place called Kamuthi. It uses sunlight to make a lot of electricity.

🎯 Exam Tip: Knowing key geographical locations of major energy projects helps in understanding India's energy landscape.

Question 3. Which is one of the first metals known and used by man?
(a) Iron
(b) Copper
(c) Gold
(d) Silver
Answer: (b) Copper
In simple words: Copper was one of the very first metals that people discovered and started using a long, long time ago. It was easy to find and work with.

🎯 Exam Tip: Early human civilizations often used easily accessible metals like copper before learning to work with harder metals like iron.

Question 4. ........................ is one of the indispensable minerals used in electrical and electronics industry.
(a) Limestone
(b) Mica
(c) Manganese
(d) Silver
Answer: (b) Mica
In simple words: Mica is a very important mineral that is used in making things for the electrical and electronics industries because it can stop electricity from flowing.

🎯 Exam Tip: Minerals like mica are valued for their specific properties, such as insulation, which makes them crucial for certain industries.

Question 5. Electricity produced from coal is called ........................
(a) Thermal Power
(b) Nuclear power
(c) Solar power
(d) Hydel power
Answer: (a) Thermal Power
In simple words: When we make electricity by burning coal, it is called thermal power. This process uses heat to create energy.

🎯 Exam Tip: Understand the different types of power generation, such as thermal (from heat), nuclear (from atoms), solar (from sun), and hydel (from water).

II. Fill in the blanks:

Question 1. ........................ is the largest producer of hydroelectricity.
Answer: China
In simple words: China makes more electricity from water than any other country in the world.

🎯 Exam Tip: Knowing the world's leading producers for various resources is important for general knowledge.

Question 2. Iron ores found at........................in Tamil Nadu.
Answer: Kanjamalai
In simple words: You can find iron ores, which are rocks containing iron, in a place called Kanjamalai in Tamil Nadu.

🎯 Exam Tip: Regional geography and specific resource locations are important for understanding local economies.

Question 3. ........................ is produced from bauxite ore.
Answer: Aluminum
In simple words: Aluminum metal comes from an ore that is called bauxite. This ore is processed to get the metal.

🎯 Exam Tip: Bauxite is the primary source for aluminum, a versatile and lightweight metal.

Question 4. ........................ is used in making electrical batteries.
Answer: Manganese
In simple words: Manganese is a mineral that is used as a key ingredient when making electrical batteries.

🎯 Exam Tip: Certain minerals have specific applications due to their chemical properties, such as manganese in battery technology.

Question 5. Petroleum and its derivatives are called ........................
Answer: Black gold
In simple words: Petroleum and the things we get from it, like petrol and diesel, are often called "Black Gold" because they are very valuable.

🎯 Exam Tip: Understanding why certain resources are given nicknames, like "Black Gold" for petroleum, highlights their economic importance.

III. Match the following:

In simple words: This table matches different types of resources with examples. Renewable resources can be replaced, metallic resources are shiny metals, non-metallic resources are non-metals, fossil fuels come from ancient life, and limestone is a type of rock.

🎯 Exam Tip: When matching, carefully consider the definitions and common examples of each category of resources to avoid errors.

IV. Consider the following statement and tick (✔) the appropriate answer:

Question 1. Assertion (A) : Wind power is clean energy.
Reason (R) : Wind turbines do not produce any emissions.
(a) A and R are correct and R explains A
(b) A and R are correct but R does not explain A
(c) A is incorrect but R is correct
(d) Both A and R are incorrect
Answer: (a) A and R are correct and R explains A
In simple words: Both statements are true. Wind power is clean energy, and the reason it is clean is that the machines (turbines) making the power do not release any smoke or harmful gases.

🎯 Exam Tip: In assertion-reason questions, first check if both statements are individually true. Then, see if the reason directly explains the assertion.

Question 2. Assertion (A) : Natural gas is found with petroleum deposits.
Reason (R) : It can be used as a domestic and industrial fuel.
(a) A and R are correct and R explains A
(b) A and R are correct but R does not explain A
(c) A is incorrect but R is correct
(d) Both A and R are incorrect
Answer: (a) A and R are correct and R explains A
In simple words: Both statements are correct. Natural gas is indeed found near petroleum, and it is widely used as a fuel in homes and factories. The reason explains its practical importance.

🎯 Exam Tip: For these types of questions, consider if the "Reason" directly answers "Why" the "Assertion" is true, not just if both are true facts.

V. Answer the following:

Question 1. What is the importance of resources?
Answer: Resources are important because they meet our daily needs like food, clothes, and shelter. They also help a country's economy grow by providing raw materials and energy. By using resources wisely, we can ensure they are available for future generations too.
In simple words: Resources give us everything we need for living, like food and clothes, and also help our country get richer.

🎯 Exam Tip: When explaining importance, always mention both direct human needs and economic contributions.

Question 2. Name major wind farms in India.
Answer: Some big wind farms in India are Muppandal, Jaisalmer, Brabmanvel, Jalgaon, and Damanjodi. These places generate a lot of electricity from wind. Wind farms are a clean way to make power, as they use the natural movement of air.
In simple words: India has big wind farms in places like Muppandal, Jaisalmer, and Jalgaon that make electricity using wind.

🎯 Exam Tip: List at least three to five examples when asked to "name major" items to ensure full marks.

Question 3. Which is the clean energy? Why?
Answer: Wind power is considered clean energy. This is because wind turbines, which catch the wind to make electricity, do not release any harmful gases into the air. This means it helps protect our planet from pollution and climate change.
In simple words: Wind power is clean energy because the big machines that make electricity from wind do not put out any pollution.

🎯 Exam Tip: Define "clean energy" and then clearly link the characteristics of wind power to that definition.

Question 4. Point out any 5 Hydroelectricity projects.
Answer: Five major hydroelectricity projects are: 1. Tehri Dam, 2. Srisailam Dam, 3. Nagarjuna Sagar Dam, 4. Sardar Sarovar Dam, and 5. Bhakra Nangal Dam. These dams use water to create electricity and are crucial for providing power and water for irrigation to many regions.
In simple words: Big dams like Tehri Dam, Srisailam Dam, and Bhakra Nangal Dam use water to make electricity for many people.

🎯 Exam Tip: When listing examples, ensure they are distinct and well-known projects relevant to the topic.

Question 5. What is limestone?
Answer: Limestone is a type of sedimentary rock. It is mainly made from the remains of sea creatures like corals, shells, and tiny organisms, along with minerals. It is a common rock and is often used in building materials like cement and as crushed stone.
In simple words: Limestone is a type of soft rock that forms from old sea animal parts and is used for building things.

🎯 Exam Tip: When describing a rock type, mention its formation (sedimentary, igneous, metamorphic) and its primary composition or origin.

VI. Distinguish the following:

Question 1. Biotic resources and abiotic resources
Answer:
Biotic resources: Biotic resources come from living things and the natural world, like plants and animals. They depend on non-living things to live. Examples include: 1. Plants, trees, animals, and tiny living things. These resources are found in the biosphere. Understanding these differences helps us manage how we use nature's gifts responsibly.
Abiotic resources: Abiotic resources are non-living parts of nature, like sun, water, and air, and they don't need living things to exist. Examples include: 1. Sunlight, temperature, water, soil, and air.
In simple words: Biotic resources are alive or come from living things (like plants and animals), while abiotic resources are non-living parts of nature (like water, air, and sunlight).

🎯 Exam Tip: Clearly state the definition and provide examples for both categories when distinguishing between them.

Question 2. Renewable resources and Non-renewable resources
Answer:
Renewable resources: Renewable resources can be used many times and are found in large amounts, like solar and wind energy. They do not cause pollution and can be replaced naturally. Examples include: 1. Solar energy, wind energy, and hydropower. Using renewable resources more helps protect the environment and ensures we have energy for a long time.
Non-renewable resources: Non-renewable resources are limited and will eventually run out, such as fossil fuels and metals. They often cause pollution and cannot be replaced quickly. Examples include: 1. Fossil fuels, iron, copper, gold, and silver.
In simple words: Renewable resources can be reused and naturally come back (like sunlight), but non-renewable ones are limited and will finish someday (like oil and metals).

🎯 Exam Tip: Highlight the key differences: availability (unlimited vs. limited), replenishability (can vs. cannot be replaced), and environmental impact (pollution-free vs. often polluting).

Question 3. Metallic resources and non-metallic resources.
Answer:
Metallic resources: Metallic resources are materials that contain metals. They are usually hard, shiny, and can conduct heat and electricity well. Examples include: 1. Iron, copper, gold, bauxite, silver, and manganese. Metals are often used for tools and wires.
Non-metallic resources: Non-metallic resources do not contain metals. They are typically not hard and do not conduct heat or electricity well. Examples include: 1. Mica, limestone, gypsum, dolomite, and phosphate. Non-metals are used for building or insulation.
In simple words: Metallic resources are natural materials with metals, like iron, that can conduct heat and electricity. Non-metallic resources are natural materials without metals, like mica, that do not conduct well.

🎯 Exam Tip: Focus on physical properties (hardness, conductivity) and composition (presence or absence of metals) when differentiating these resource types.

VII. Give reason:

Question 1. Aluminium has a wide range of uses compared to other metals.
Answer: Aluminium is widely used because it is light in weight, strong, and also affordable. This makes it a popular material for many construction purposes. It is often used in making airplanes, ships, cars, and railway coaches. Its ability to resist rust also adds to its versatility and long-lasting nature.
In simple words: Aluminium is used a lot because it is light, strong, cheaper than some other metals, and does not rust easily, making it great for vehicles and buildings.

🎯 Exam Tip: When explaining reasons for wide usage, always list the key properties of the material that make it suitable (e.g., strength, weight, cost, corrosion resistance).

Question 2. Water is considered a great source of energy.
Answer: Water is considered a great source of energy because it is used to produce hydroelectric power. When water flows with high speed and drops from a great height, it turns special machines called turbines and dynamos to create electricity. This type of power is clean and does not produce harmful emissions, making it an eco-friendly option.
In simple words: Water is a big source of energy because its movement can create electricity in power plants, and it is a clean way to make power.

🎯 Exam Tip: Emphasize both the mechanism of energy generation (hydropower) and the environmental benefit (clean energy) in your explanation.

VIII. Answer in a paragraph:

Question 1. Explain the different types of renewable resources.
Answer: Renewable resources are natural resources that can be replaced or replenished over time, making them sustainable for long-term use. Key types include solar energy, hydropower, and wind energy.
Solar energy: This comes from the sun's heat and light, which can be turned into electricity using special devices called solar cells. It is a clean energy source that does not harm the environment. Many countries, including India, China, and the USA, are major users.
Hydropower: This uses the force of moving water, often from dams, to generate electricity. It is one of the cheapest and most versatile energy sources. China is the largest producer, with other significant contributors being Canada, Brazil, and India.
Wind energy: Wind power is generated by large wind turbines that capture the wind's natural movement. It is considered clean energy because it does not produce any harmful emissions. In recent years, it has become an economical and widely adopted technology, with major producing countries including the USA, China, and Germany. These resources are vital for reducing our dependence on fossil fuels and combating climate change.
In simple words: Renewable resources are natural things like sun, water, and wind that keep coming back. Solar energy uses sunlight, hydropower uses moving water, and wind energy uses wind to make clean electricity, helping our planet.

🎯 Exam Tip: When explaining different types, define each, mention its source, how it's converted to energy, and note its key benefits.

Question 2. Describe the non-metallic resources.
Answer: Non-metallic resources are natural materials that do not contain metals and typically do not conduct heat or electricity well. These resources are generally not as hard or shiny as metals. They are crucial for various industries due to their unique properties. Examples include mica and limestone.
Mica: Common forms like Muscovite and Biotite are important ores. Mica is an indispensable mineral in the electrical and electronics industry because it is an excellent insulator. In powdered form, it is also used for making lubricating oils and decorative wallpapers.
Limestone: This is a sedimentary rock formed mainly from the skeletal remains of marine organisms such as corals and shells. About 10% of sedimentary rocks are limestones. It is widely used as a crushed stone in construction, for facing stones, floor tiles, and in metal refining processes. Portland cement is also made from limestone. These resources are essential for many industries, proving that not all valuable resources are metallic.
In simple words: Non-metallic resources, like mica and limestone, are found in nature but don't have metals. Mica is used in electronics and as an insulator, while limestone is a rock from sea creatures, used widely for building materials and cement.

🎯 Exam Tip: For descriptions, beyond defining the resource, include examples and their specific uses or properties that make them valuable.

Question 3. What are the different types of fossil fuel resources? Explain them.
Answer: Fossil fuels are natural resources formed over millions of years from the buried remains of dead plants and animals. They are rich in hydrocarbons and are a major source of energy globally. The main types are coal, petroleum, and natural gas.
Coal: This is the most abundantly found fossil fuel, formed when dead plant matter is converted into peat under high pressure and heat. It is widely used as a domestic fuel, in heavy industries like iron and steel, and to power steam engines for electricity generation.
Petroleum: Often called "Black Gold" due to its immense value, petroleum is found trapped between layers of rocks in offshore and coastal areas. It is drilled from the Earth and refined to produce various derivatives such as diesel, petrol, kerosene, and plastics.
Natural gas: This fossil fuel is typically found alongside petroleum deposits. It is released when crude oil is brought to the surface. Natural gas is considered a cleaner-burning fossil fuel and is extensively used as a domestic and industrial fuel. These fuels have powered industrial development but their burning also releases greenhouse gases.
In simple words: Fossil fuels like coal, petroleum (oil), and natural gas come from very old plants and animals. Coal is solid and used for power. Petroleum is liquid and makes petrol and diesel. Natural gas is a cleaner gas used for cooking and industries.

🎯 Exam Tip: For each fossil fuel type, explain its origin, its primary forms, and its main uses, also noting any significant nicknames (like "Black Gold").

IX. Activity:

2. Crossword puzzle

Across
Question 2. The leading coal producers of the world.
Answer: China
In simple words: China is the country that produces the most coal in the whole world.

🎯 Exam Tip: Being familiar with global leaders in resource production is good for general knowledge questions.

Question 4. Considered a great source of energy.
Answer: Water
In simple words: Water is seen as a very important source of energy because it can be used to make electricity.

🎯 Exam Tip: Consider the most common and widely recognized sources of energy when solving such riddles.

Question 5. Precious metal like gold.
Answer: Silver
In simple words: Silver is a metal that is considered precious, much like gold, and is valued for its shine and uses.

🎯 Exam Tip: Think of metals commonly associated with being "precious" in comparison to gold, such as silver or platinum.

Question 6. Used as an insulating material in the electrical industry.
Answer: Mica
In simple words: Mica is a type of mineral that is used in electrical items because it stops electricity from flowing through it.

🎯 Exam Tip: Specific properties of minerals (like insulation for mica) are often the clues for such questions.

Down
Question 1. Used in making electrical batteries.
Answer: Manganese
In simple words: Manganese is a mineral that plays a key role in making electrical batteries work.

🎯 Exam Tip: Recall minerals associated with common technologies like batteries.

Question 2. Good conductor of heat and electricity.
Answer: Copper
In simple words: Copper is a metal that is really good at letting heat and electricity pass through it.

🎯 Exam Tip: Metals are generally good conductors, and copper is a prime example used in wiring.

Question 3. The largest producer of gold in India.
Answer: Karnataka
In simple words: Karnataka is the state in India that produces the most gold.

🎯 Exam Tip: Regional knowledge about resource production in India is important for specific questions.

Question 5. Produces energy in the form of heat and light.
Answer: Sun
In simple words: The sun is the main source that gives us both heat and light energy.

🎯 Exam Tip: The sun is the ultimate source of most energy on Earth, whether directly as solar power or indirectly as fossil fuels.

7th Social Science Guide Resources Additional Important Questions and Answers

I. Choose the Correct answer:

Question 1. Bhatra Nangal Dam is situated in
(a) Punjab
(b) Hariyana
(c) Gujarat
(d) Orissa
Answer: (a) Punjab
In simple words: The Bhakra Nangal Dam, an important dam in India, is located in the state of Punjab. It is a major source of water and electricity for the region.

🎯 Exam Tip: When answering questions about famous landmarks, always remember their correct geographical location to score full marks.

Question 2. Which is the fourth most element in Earth's crust?
(a) Silica
(b) Zypsum
(c) Iron
(d) Copper
Answer: (c) Iron
In simple words: Iron is a very common element found in the Earth's crust. It is the fourth most abundant, meaning there's a lot of it around.

🎯 Exam Tip: Knowing the abundance of elements like iron helps understand their importance in geology and resource management.

Question 3. Aluminium is produced from which ore?
(a) Maganese
(b) mica
(c) Bauxite
(d) Anthraxite
Answer: (c) Bauxite
In simple words: Aluminium is made from an ore called bauxite. Bauxite is a rock that contains a lot of aluminium.

🎯 Exam Tip: Remember that bauxite is the primary ore for aluminium, and it is crucial for industrial production.

Question 4. Which is the world's leading silver producer?
(a) India
(b) Mexico
(c) South Africa
(d) Srilanka
Answer: (b) Mexico
In simple words: Mexico produces the most silver in the world. This makes it a very important country for the global silver market.

🎯 Exam Tip: It is good to know the top producing countries for major minerals as it shows global economic geography.

Question 5. Which is steel, greyed hard, shiny and brittle metal?
(a) Manganese
(b) Mercury
(c) Silver
(d) Zinc
Answer: (a) Manganese
In simple words: Manganese is a metal that looks like steel, is hard, shiny, and can break easily. It is often used to make steel stronger.

🎯 Exam Tip: Understand the key properties of metals to correctly identify them in descriptions, like manganese being hard and brittle.

II. Fill in the blanks:

Question 1. .................... energy is not harmful to the environment.
Answer: Solar
In simple words: Solar energy does not cause harm to our environment. It is a clean way to get power.

🎯 Exam Tip: Identify renewable and non-polluting energy sources as environmentally friendly options.

Question 2. Hydroelectricity is generated from .................... water.
Answer: moving
In simple words: Hydroelectricity comes from the force of moving water. This energy is used to make electricity.

🎯 Exam Tip: Focus on keywords like 'moving water' when explaining how hydroelectricity is produced.

Question 3. .................... resources that are once consumed and cannot be replaced.
Answer: Non - renewable
In simple words: Non-renewable resources are those that once used up, cannot be made again. They are limited.

🎯 Exam Tip: Clearly distinguish between renewable and non-renewable resources based on their ability to be replenished.

Question 4. .................... is the world's number one country in the production of copper.
Answer: Chile
In simple words: Chile is the country that produces the most copper in the world. It is a very important producer of this metal.

🎯 Exam Tip: Knowing which countries lead in producing specific minerals helps understand global resource distribution.

Question 5. .................... is a rare and precious metal.
Answer: Gold
In simple words: Gold is a special and valuable metal that is not found easily. It has been prized for a long time.

🎯 Exam Tip: Remember gold's unique properties as a rare and precious metal, which contributes to its high value.

Question 6. .................... field is one of the deepest mines of the world located in India.
Answer: Kolar Gold
In simple words: The Kolar Gold Field in India is known as one of the deepest mines globally. It was famous for gold mining.

🎯 Exam Tip: Associate the Kolar Gold Field with its historical significance as a deep gold mine in India.

Question 7. .................... is the world's leading bauxite producer.
Answer: Australia
In simple words: Australia produces more bauxite than any other country in the world. Bauxite is used to make aluminium.

🎯 Exam Tip: Note Australia's leading role in bauxite production, a key resource for aluminium manufacturing.

Question 8. .................... is the world's leading producer of manganese.
Answer: South Africa
In simple words: South Africa is the biggest producer of manganese in the world. Manganese is important for making steel.

🎯 Exam Tip: Remember South Africa's prominence in manganese production, essential for various industrial uses.

Question 9. .................... and .................... are the common ores of mica.
Answer: Muscovite, Biotite
In simple words: Muscovite and Biotite are the two main types of rock from which mica is obtained. These are the most common forms of mica ore.

🎯 Exam Tip: Identify Muscovite and Biotite as the common mineral forms of mica, widely used in various applications.

Question 10. .................... is the world's top producer of Mica.
Answer: China
In simple words: China produces the most mica in the world. This makes it a key supplier of mica to other countries.

🎯 Exam Tip: Keep in mind China's position as the leading global producer of mica.

Question 11. Fossil fuels are formed from .....................
Answer: hydro carbon
In simple words: Fossil fuels are made from hydrocarbons. These are natural compounds made of hydrogen and carbon.

🎯 Exam Tip: Understand that hydrocarbons are the chemical building blocks of all fossil fuels like coal, oil, and natural gas.

Question 12. .................... in china is the largest hydroelectricity project in the world.
Answer: Three Gorges Dam
In simple words: The Three Gorges Dam in China is the biggest project in the world for making electricity from water. It's a huge dam.

🎯 Exam Tip: Recall the Three Gorges Dam as the largest hydroelectric project globally, highlighting China's engineering achievements.

Question 13. Tehri Dam is situated in .....................
Answer: Uttarakhand
In simple words: The Tehri Dam is located in the Indian state of Uttarakhand. It is one of the highest dams in the country.

🎯 Exam Tip: Know the location of important national projects like the Tehri Dam within their respective states.

Question 14. The leading coal producers of the world is .....................
Answer: China
In simple words: China produces more coal than any other country. This makes it a major player in the global energy market.

🎯 Exam Tip: Recognize China's dominance in coal production, impacting global energy and environmental policies.

Question 15. .................... energy is not harmful to the environment
Answer: Solar
In simple words: Solar energy does not harm the environment. It's a clean and safe way to generate power.

🎯 Exam Tip: Understand that solar energy is a sustainable and eco-friendly option for power generation.

III. Match the following:

🎯 Exam Tip: When matching, look for unique associations between countries and their primary mineral resources to ensure correct pairings.

IV. Consider the following statement and tick (✔) the appropriate answer:

Question 1. Assertion (A) : Aluminum is a popular metal for construction purposes.
Reason (R) : Aluminium light in weight tough and cheaper,
(a) R is not the correct explanation of A
(b) R is the correct explanation of A
(c) A is correct and R is wrong
(d) (A) and (R) are Correct
Answer: (d) (A) and (R) are Correct
In simple words: Both the statement that Aluminum is popular for construction and the reason that it is light, strong, and affordable are true. However, the reason as written is incomplete as an explanation of why it is popular for construction. A better reason would connect its properties directly to construction benefits.

🎯 Exam Tip: In assertion-reason questions, first check if both statements are true, then determine if the reason directly explains the assertion.

V. Answer the following:

Question 1. What is the importance of resources?
Answer: Resources are very important for people because they help meet our daily needs. Things like food, clothes, and homes all come from resources. They also help a country's economy grow and become stronger by providing materials and opportunities.
In simple words: Resources are important because they fulfill our daily needs like food and shelter, and they help improve a country's economy.

🎯 Exam Tip: When explaining the importance of resources, always mention both their role in fulfilling human needs and their contribution to economic development.

Question 2. Name major wind farms in India.
Answer: Some of the main wind farms in India are Muppandal, Jaisalmer, Brabmanvel, Jalgaon, and Damanjodi. These locations have many wind turbines that generate electricity.
In simple words: Major wind farms in India are found in places like Muppandal, Jaisalmer, Brabmanvel, Jalgaon, and Damanjodi.

🎯 Exam Tip: When listing examples, ensure you name prominent and recognized locations related to the specific topic, like major wind farms.

Question 3. Which is the clean energy? Why?
Answer: Wind power is considered clean energy. This is because wind turbines, which capture wind energy, do not release any harmful gases or pollution into the air. They produce electricity without causing environmental damage.
In simple words: Wind power is clean energy because wind turbines do not let out any pollution.

🎯 Exam Tip: Define "clean energy" by explaining that it refers to sources that do not produce harmful emissions or pollutants.

Question 4. Point out any 5 Hydroelectricity projects.
Answer: Here are five major hydroelectricity projects: 1. Tehri Dam 2. Srisailam Dam 3. Nagarjuna Sagar Dam 4. Sardar Sarovar Dam 5. Bhakra Nangal Dam These dams use water flow to generate electricity for many regions.
In simple words: Five big hydroelectricity projects are Tehri, Srisailam, Nagarjuna Sagar, Sardar Sarovar, and Bhakra Nangal Dams.

🎯 Exam Tip: Always include the word "Dam" when referring to hydroelectric projects to clearly identify them.

Question 5. What is limestone?
Answer: Limestone is a type of sedimentary rock. It is mainly made up of the remains of sea creatures like corals and shells. These tiny fragments build up over time to form limestone, which is widely used in construction.
In simple words: Limestone is a rock made from the skeletal parts of sea creatures.

🎯 Exam Tip: Focus on limestone's origin from marine organisms and its classification as a sedimentary rock when defining it.

VI. Distinguish the following:

Question 1. Differences between Manganese and Mica
Answer:Manganese: 1. Manganese is a metal that is hard, shiny, steel-grey, and can be brittle. 2. Its main ores are pyrolusite, psilomelane, and rhodochrosite. 3. Manganese is used to make electrical batteries, disinfectants, bleaching powder, and fertilizers. 4. South Africa is the biggest producer of Manganese globally. Mica: 1. Mica is a soft metal and a good insulator. 2. Its common ores are muscovite and biotite. 3. Mica is used in the electrical industry for lubricants and decorative wallpapers. 4. China is the leading producer of Mica worldwide. Manganese is a metallic resource, while mica is a non-metallic resource with very different uses.
In simple words: Manganese is a hard, shiny metal used in batteries, mainly produced by South Africa. Mica is a soft, insulating mineral used in electrical items, with China as its top producer.

🎯 Exam Tip: When distinguishing, create clear, parallel points for each item, comparing properties, uses, and origins or production leaders.

VII. Give reason:

Question 1. Wind power is clean energy.
Answer: Wind power is considered clean energy because wind turbines do not create any pollution or harmful emissions when they generate electricity. They use the natural force of wind, making it one of the most eco-friendly and sustainable energy sources available today.
In simple words: Wind power is clean because wind turbines do not release any pollution.

🎯 Exam Tip: Always link the term "clean energy" to the absence of pollution or harmful emissions in the explanation.

VIII. Answer in a paragraph:

Question 1. Explain the different types of renewable resources.
Answer: Renewable resources are natural resources that can be replaced or replenished over time. The main types include: Solar energy: This comes from the sun's heat and light. It's clean and doesn't harm the environment. Solar cells convert sunlight directly into electricity. Countries like India, China, and the USA use a lot of solar energy. Hydropower: This is energy from moving water. It's one of the cheapest and most flexible energy sources. Big dams capture water to make electricity. China is the largest producer of hydroelectricity. Wind energy: This uses wind turbines to convert wind into electricity. Wind power is clean and doesn't cause pollution. It has become very cost-effective, with the US, China, and Germany being top producers.
In simple words: Renewable resources like solar, hydropower, and wind energy can be naturally replenished. They are good for the environment because they produce electricity without causing pollution.

🎯 Exam Tip: When explaining types of renewable resources, always describe what each is, how it works, and its environmental benefit.

Question 2. Describe the non-metallic resources.
Answer: Non-metallic resources are natural materials that do not contain metals. They are usually not hard like metals and do not conduct heat or electricity well. Common examples include mica, limestone, gypsum, dolomite, and phosphate, which are used in many different industries. Mica is a non-metallic mineral whose common types are muscovite and biotite. It is widely used in the electrical and electronics industries and also in decorative products. Limestone is another non-metallic resource, a sedimentary rock mostly made from marine animal remains. It is used in construction, for making cement, and in metal refining processes.
In simple words: Non-metallic resources are natural materials without metals, like mica and limestone. They are not hard and don't conduct electricity well, used in things like electronics and construction.

🎯 Exam Tip: When describing non-metallic resources, mention their key characteristics (no metal, poor conductivity) and provide examples with their uses.

IX. Activity:

2. Crossword puzzle

Question 1. Across
2. The leading coal producers of the world.
Answer: China
In simple words: China is the top country that produces coal.

🎯 Exam Tip: For crossword answers, ensure your response directly fits the clue and the number of letters required.

Question 2. Across
4. Considered a great source of energy.
Answer: Water
In simple words: Water is seen as a big source of energy, especially for making hydroelectricity.

🎯 Exam Tip: Think broadly about energy sources, not just fuels, when considering what can be a "great source of energy."

Question 3. Across
5. Precious metal like gold.
Answer: Silver
In simple words: Silver is a valuable metal, just like gold.

🎯 Exam Tip: Consider other precious metals when the clue implies a high-value element similar to a given example.

Question 4. Across
6. Used as an insulating material in the electrical industry.
Answer: Mica
In simple words: Mica is used in electrical items because it stops electricity from passing through.

🎯 Exam Tip: Relate the function of "insulating material" directly to specific minerals known for that property, like mica.

Question 5. Down
1. Used in making electrical batteries.
Answer: Manganese
In simple words: Manganese is a metal used to make batteries for electrical devices.

🎯 Exam Tip: Think about the components of common electrical devices when answering clues related to industrial uses.

Question 6. Down
2. Good conductor of heat and electricity.
Answer: Copper
In simple words: Copper lets heat and electricity pass through it very well.

🎯 Exam Tip: Identify common metals known for their excellent conductive properties, like copper.

Question 7. Down
3. The largest producer of gold in India.
Answer: Karnataka
In simple words: Karnataka is the Indian state that produces the most gold.

🎯 Exam Tip: Remember specific states associated with the highest production of key minerals within India.

Question 8. Down
5. Produces energy in the form of heat and light.
Answer: Sun
In simple words: The sun gives us energy as heat and light.

🎯 Exam Tip: Recognize the sun as the primary natural source of heat and light energy.