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Q1. The process of collecting and storing rainwater for future use is called:
Rainwater harvesting is the process of collecting rainwater from rooftops, surfaces or catchments and storing it in tanks, reservoirs or underground for future use. This method helps conserve water, recharge groundwater and prevent water scarcity. It is an ancient practice that is still very relevant today.
Q2. Which of the following is a traditional method of rainwater harvesting in India?
Baolis, also known as stepwells, are traditional rainwater harvesting structures found in India. They have steps leading down to water and were used to store rainwater for drinking and irrigation. These structures also helped recharge groundwater and provided water during dry seasons.
Q3. Baolis are also known as:
Baolis are also called stepwells because they have a series of steps leading down to the water level. These were built in ancient India to store rainwater and provide access to water even during dry periods. They also served as community gathering places.
Q4. Rainwater harvesting helps in:
Rainwater harvesting is beneficial in many ways. It recharges groundwater by allowing water to seep into the ground, prevents floods by collecting excess rainwater and reduces water scarcity by providing stored water for future use. It is an eco-friendly and sustainable practice.
Q5. The ultimate source of energy for all living things is the:
The Sun is the ultimate source of energy for all living organisms on Earth. It provides light and heat, which are essential for life. Plants use sunlight to make food through photosynthesis, and animals depend on plants directly or indirectly for their energy needs.
Q6. Solar energy is used to:
Solar energy is a clean and renewable source of energy that can be used for many purposes. It is used to generate electricity through solar panels, heat water using solar water heaters and cook food using solar cookers. Solar energy helps reduce our dependence on fossil fuels.
Q7. A solar panel converts sunlight into:
Solar panels are devices that convert sunlight directly into electricity. They are made up of photovoltaic cells that absorb sunlight and generate an electric current. Solar panels are used to power homes, streetlights and many electronic devices.
Q8. Forests are important because they:
Forests are vital for the health of the planet and all living things. They provide oxygen, absorb carbon dioxide, give shelter to animals and prevent soil erosion by holding the soil with their roots. Forests also give us many useful products like wood, fruits and medicines.
Q9. The Chipko Movement was started in India to:
The Chipko Movement was a forest conservation movement that started in the 1970s in Uttarakhand, India. Villagers, especially women, hugged trees to prevent them from being cut down by loggers. The movement helped raise awareness about the importance of forests and led to a ban on cutting trees in the area.
Q10. The Chipko Movement is an example of:
The Chipko Movement is a famous example of environmental conservation and people’s participation in protecting nature. It showed the power of community action and non-violent protest. The movement was successful in saving many forests and inspired similar movements around the world.
Q11. The practice of planting more trees is called:
Afforestation is the practice of planting trees in areas where there were none before. It is done to create new forests, increase green cover and restore degraded land. Afforestation helps improve the environment by absorbing carbon dioxide and providing habitat for wildlife.
Q12. Soil is a natural resource because:
Soil is a natural resource that is essential for the growth of plants. It provides nutrients, water and support to plants. Soil is formed naturally over a long period of time through the weathering of rocks and the decomposition of organic matter.
Q13. The top layer of the Earth’s crust is made up of:
The Earth’s crust is made up of rocks and minerals. Rocks are solid masses of minerals, and minerals are naturally occurring substances with a definite chemical composition. These rocks and minerals provide the building materials for many human activities.
Q14. Rocks are of three types:
Rocks are classified into three main types based on how they are formed. Igneous rocks are formed from cooling magma, sedimentary rocks are formed from layers of sediment, and metamorphic rocks are formed from existing rocks under heat and pressure. Examples include granite (igneous), limestone (sedimentary) and marble (metamorphic).
Q15. The preservation and protection of soil is called:
Soil conservation is the practice of protecting soil from being washed or blown away by wind and water. It involves methods like planting trees, building embankments and using contour ploughing. Soil conservation is important for maintaining soil fertility and agricultural productivity.
Q16. Fossil fuels are formed from:
Fossil fuels like coal, petroleum and natural gas are formed from the remains of dead plants and animals that lived millions of years ago. These remains were buried under layers of soil and rock, where heat and pressure transformed them into fossil fuels. Fossil fuels are non-renewable resources.
Q17. Which of the following is a fossil fuel?
Coal is a fossil fuel that is formed from the remains of dead plants that lived millions of years ago. It is used for generating electricity and in industrial processes. Coal is a non-renewable resource because it takes millions of years to form.
Q18. Petroleum is also called:
Petroleum is called liquid gold because it is a very valuable resource. It is used to produce fuels like petrol and diesel, as well as plastics, lubricants and many other products. Petroleum is a non-renewable resource and is found deep underground.
Q19. Natural gas is used for:
Natural gas is a clean-burning fossil fuel used for cooking food and heating homes. It is also used to generate electricity and produce fertilizers. Natural gas is a non-renewable resource and is usually found along with petroleum deposits.
Q20. LPG stands for:
LPG stands for Liquefied Petroleum Gas. It is a mixture of hydrocarbon gases like propane and butane, which are compressed into liquid form. LPG is commonly used as cooking gas in homes and cylinders.
Q21. The resources that can be replenished naturally are called:
Renewable resources are those that can be replenished naturally over a short period of time. Examples include sunlight, wind, water and forests. These resources are sustainable and do not get exhausted if used wisely.
Q22. The resources that take millions of years to form and are limited in quantity are called:
Non-renewable resources are those that take millions of years to form and cannot be replaced once they are used up. Examples include coal, petroleum and natural gas. These resources are limited and must be used carefully to ensure they last for future generations.
Q23. Which of the following is a renewable resource?
Solar energy is a renewable resource because it comes from the Sun and is available continuously. Unlike coal, petroleum and natural gas, which are non-renewable fossil fuels, solar energy will not run out. It is a clean and sustainable source of energy.
Q24. Which of the following is a non-renewable resource?
Coal is a non-renewable resource because it takes millions of years to form from dead plants and animals. Once coal is extracted and burned, it cannot be replaced within a human lifetime. It is a fossil fuel used for electricity generation but is limited in supply.
Q25. The overuse of fossil fuels leads to:
The overuse of fossil fuels like coal, petroleum and natural gas leads to serious environmental problems. Burning these fuels releases harmful gases like carbon dioxide, which cause air pollution, global warming and climate change. This is why we need to shift to renewable energy sources.
Q26. The process of saving natural resources for future generations is called:
Conservation is the careful management and protection of natural resources to ensure they are available for future generations. It involves using resources wisely and preventing waste. Conservation of resources like water, forests, soil and fossil fuels is essential for sustainable development.
Q27. The three fossil fuels are:
The three main fossil fuels are coal, petroleum and natural gas. These are formed from the remains of dead plants and animals over millions of years. They are non-renewable resources and are used for energy generation, transportation and various industrial purposes.
Q28. The Chipko Movement began in the state of:
The Chipko Movement began in the 1970s in the state of Uttarakhand, which was then part of Uttar Pradesh. The villagers, especially women, hugged trees to protect them from being cut down by contractors. The movement became a symbol of peaceful resistance and environmental protection.
Q29. The traditional stepwells used for rainwater harvesting are called:
Baolis, also known as stepwells, are traditional rainwater harvesting structures found in India. They have steps leading down to the water, allowing people to reach the water at different levels. These structures were built to store rainwater and provide water during dry seasons.
Q30. The resources that are made by humans using natural resources are called:
Human-made resources are those that are created by humans using natural resources. Examples include buildings, roads, vehicles, machines and plastic. These resources do not exist in nature but are made by transforming natural resources through technology and labour.
Q31. Which of the following is a human-made resource?
Plastic is a human-made resource because it is created by humans from natural resources like petroleum. It is not found in nature naturally and is used to make a wide variety of products. Human-made resources are also called synthetic resources.
Q32. The process of water seeping into the ground is called:
Infiltration is the process by which water on the ground surface enters the soil and moves down to become groundwater. Rainwater harvesting helps increase infiltration and recharge groundwater. Infiltration is an important part of the water cycle.
Q33. The conservation of forests is important because:
Forests are important for preventing soil erosion, absorbing carbon dioxide and releasing oxygen. They also provide habitat for wildlife and help maintain the water cycle. Deforestation leads to many environmental problems, so forest conservation is essential.
Q34. The water stored in underground layers is called:
Groundwater is the water that is stored underground in soil pores and cracks in rocks. It is an important source of water for drinking and irrigation. Rainwater harvesting helps recharge groundwater and prevent it from being depleted.
Q35. LPG is commonly used as:
LPG (Liquefied Petroleum Gas) is commonly used as cooking gas in homes. It is stored in cylinders and is convenient and clean-burning. LPG is a byproduct of petroleum refining and natural gas processing.
Q36. The conservation of fossil fuels is important because:
Fossil fuels are non-renewable resources that take millions of years to form. Once they are used, they cannot be replaced quickly. Conserving fossil fuels helps ensure that there is enough for future generations.
Q37. The term ‘fossil fuel’ refers to fuels that are:
Fossil fuels are formed from the remains of dead plants and animals that lived millions of years ago. Over time, heat and pressure transformed these remains into coal, petroleum and natural gas. Fossil fuels are non-renewable resources.
Q38. The name ‘Chipko’ means:
The word ‘Chipko’ means ‘to hug’ or ‘to cling’ in Hindi. In the Chipko Movement, villagers hugged trees to prevent them from being cut down. This non-violent form of protest became a powerful symbol of environmental activism.
Q39. Which of the following is NOT a renewable resource?
Coal is a non-renewable resource, while wind energy, solar energy and water are renewable. Coal takes millions of years to form and cannot be replenished quickly. Renewable resources can be used repeatedly and are naturally replenished.
Q40. The main source of energy for the water cycle is:
The Sun is the main source of energy for the water cycle. Its heat causes water to evaporate from oceans, rivers and lakes, forming water vapour. The Sun also drives condensation and precipitation, making it the driving force behind the entire water cycle.
Q41. The use of solar energy helps:
Solar energy is clean, renewable and does not produce harmful emissions. Using solar energy helps reduce pollution, saves non-renewable resources like coal and petroleum, and provides a sustainable source of energy. It is an environmentally friendly alternative.
Q42. The resource that is essential for the growth of plants and is formed from rocks is:
Soil is formed from the weathering of rocks and the decomposition of organic matter. It is essential for the growth of plants because it provides nutrients, water and support. Soil is a vital natural resource for agriculture and food production.
Q43. A mineral is a naturally occurring substance with a definite:
A mineral is a naturally occurring inorganic substance that has a definite chemical composition and structure. Examples include quartz, feldspar and iron ore. Minerals are the building blocks of rocks and are used in many industries.
Q44. The heat energy from the Earth’s interior is called:
Geothermal energy is the heat energy that comes from deep inside the Earth. It is used to generate electricity and for heating buildings. Geothermal energy is a renewable source of energy.
Q45. The energy obtained from flowing water is called:
Hydroelectric energy is the energy obtained from flowing or falling water. Dams are built to store water, and when the water flows through turbines, it generates electricity. Hydroelectric energy is a renewable source of energy.
Q46. The process of using less resources and avoiding waste is called:
Conservation means using resources wisely and avoiding waste to ensure they last longer. It includes reducing consumption, reusing items and recycling materials. Conservation is important for protecting the environment and saving resources for future generations.
Q47. Which of the following is used to generate electricity from wind?
Wind turbines are devices used to convert wind energy into electricity. When the wind blows, it turns the blades of the turbine, which spins a generator to produce electricity. Wind energy is a clean and renewable source of energy.
Q48. Natural resources can be conserved by:
Natural resources can be conserved in many ways, including planting more trees, saving water and using renewable energy. Reducing waste, reusing items and recycling materials also help conserve natural resources. Conservation is important for the health of the planet.
Q49. The layer of the Earth where soil is found is called the:
The Earth’s crust is the outermost solid layer of the Earth. Soil is formed on the surface of the crust from the weathering of rocks and the decomposition of organic matter. The crust contains many minerals and rocks that are useful for humans.
Q50. The Baolis (stepwells) were built to:
Baolis or stepwells were built in ancient India to store rainwater, provide drinking water and recharge groundwater. They were an important source of water for communities and also served as gathering places. Baolis are examples of traditional water conservation methods.
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Q51. The conservation of fossil fuels is important because they:
Fossil fuels are limited, non-renewable and cause pollution when burnt. Conserving them is important to ensure they last longer and to reduce the harmful effects of pollution and climate change. Shifting to renewable energy sources is a key part of conservation.
Q52. The resource that is found in nature and is not made by humans is called:
Natural resources are those that are found in nature and are not made by humans. Examples include air, water, soil, forests, minerals and fossil fuels. These resources are essential for the survival and development of all living things.
Q53. The movement to protect forests in Uttarakhand in the 1970s is known as the:
The Chipko Movement started in Uttarakhand in the 1970s to protect forests from being cut down. Villagers hugged trees to prevent them from being felled. This movement became famous worldwide and inspired other environmental movements.
Q54. The liquid form of petroleum is called:
The liquid form of petroleum is called crude oil. It is found deep underground and is extracted through drilling. Crude oil is refined to produce fuels like petrol and diesel, as well as many other products.
Q55. The use of fossil fuels is harmful to the environment because:
Burning fossil fuels releases carbon dioxide and other harmful gases, which contribute to air pollution and global warming. These gases trap heat in the atmosphere and cause climate change. This is why it is important to use fossil fuels responsibly and shift to cleaner energy sources.
Q56. The process of separating useful substances from mixtures is called:
Separation is the process of separating useful substances from mixtures. This is important in everyday life and in industries. Methods of separation include filtration, evaporation, sedimentation, decantation and magnetic separation.
Q57. The conservation of soil is important for:
Soil conservation is important for agriculture because it maintains soil fertility. It also helps prevent floods by absorbing water and maintains biodiversity by providing habitat for many organisms. Soil conservation is essential for food security and environmental health.
Q58. The resource that is not made by humans and is found naturally is:
Water is a natural resource because it is found in nature and is not made by humans. Plastic, furniture and paper are human-made resources. Natural resources like water are essential for the survival of all living things.
Q59. The use of non-renewable resources should be reduced because:
Non-renewable resources like coal, petroleum and natural gas are limited in supply. They take millions of years to form and will eventually run out if we continue to use them at the current rate. This is why it is important to reduce their use and find sustainable alternatives.
Q60. The ultimate goal of resource conservation is to:
The ultimate goal of resource conservation is to ensure that natural resources are available for future generations. Conservation involves using resources wisely, reducing waste and protecting the environment. This is essential for sustainable development.