At BodhiClasses, we aim to bridge classroom learning with real-world awareness. Our expertly curated content nurtures environmental sensitivity and academic clarity. This resource features well-structured extra questions and answers from NCERT Class 6 Science Chapter 11 – Nature’s Treasures, designed to deepen conceptual understanding while preparing students for exams effectively.
Multiple Choice Questions (MCQs) – (20 Questions with Answers)
1. What is the percentage of nitrogen in the air?
(a) 21%
(b) 78%
(c) 1%
(d) 50%
Answer: (b) 78%
2. Which gas is essential for respiration in humans and animals?
(a) Carbon dioxide
(b) Nitrogen
(c) Oxygen
(d) Hydrogen
Answer: (c) Oxygen
3. What is the main source of energy on Earth?
(a) Fire
(b) Electricity
(c) Sun
(d) Coal
Answer: (c) Sun
4. Which natural resource is most commonly used for cooking in rural areas?
(a) Natural gas
(b) LPG
(c) Firewood
(d) Solar energy
Answer: (c) Firewood
5. What makes a firki (pinwheel) rotate?
(a) Light
(b) Water
(c) Wind
(d) Electricity
Answer: (c) Wind
6. Which of the following is a renewable resource?
(a) Petrol
(b) Coal
(c) Forest
(d) Natural gas
Answer: (c) Forest
7. Stepwells are traditional structures for:
(a) Building temples
(b) Water harvesting
(c) Wind generation
(d) Growing crops
Answer: (b) Water harvesting
8. Fossil fuels include all except:
(a) Petrol
(b) Solar energy
(c) Coal
(d) Natural gas
Answer: (b) Solar energy
9. Which movement involved hugging trees to prevent them from being cut?
(a) Green Movement
(b) Save Forest Movement
(c) Chipko Movement
(d) Tree Hugger Movement
Answer: (c) Chipko Movement
10. What is a major cause of air pollution in cities?
(a) Burning wood
(b) Bicycle riding
(c) Solar panels
(d) Vehicle emissions
Answer: (d) Vehicle emissions
11. Which of the following supports biodiversity the most?
(a) Desert
(b) Forest
(c) Mountain top
(d) Glacier
Answer: (b) Forest
12. Which is a non-renewable resource?
(a) Wind
(b) Water
(c) Soil
(d) Petroleum
Answer: (d) Petroleum
13. Which mineral is used in making mobile phones?
(a) Iron
(b) Limestone
(c) Gold
(d) Clay
Answer: (c) Gold
14. What helps in holding soil and preventing erosion?
(a) Rocks
(b) Roots of trees
(c) Pebbles
(d) Wind
Answer: (b) Roots of trees
15. What is rainwater harvesting?
(a) Storing underground water
(b) Collecting rainwater for later use
(c) Using bottled water
(d) Cleaning rainwater
Answer: (b) Collecting rainwater for later use
16. What is the main reason to conserve fossil fuels?
(a) They are very cheap
(b) They are easily available
(c) They cause air pollution and are limited
(d) They are renewable
Answer: (c) They cause air pollution and are limited
17. Which one is not a natural resource?
(a) Water
(b) Air
(c) Chair
(d) Soil
Answer: (c) Chair
18. What makes the soil fertile in forests?
(a) Stones
(b) Animal footprints
(c) Decayed leaves
(d) Sand
Answer: (c) Decayed leaves
19. Which of these is used to generate electricity using wind?
(a) Dam
(b) Firki
(c) Windmill
(d) Generator
Answer: (c) Windmill
20. What is the term used for resources created by humans?
(a) Renewable resources
(b) Natural resources
(c) Man-made resources
(d) Abiotic resources
Answer: (c) Man-made resources
One Mark Questions (Short Answers) – (15 Questions)
1. Name one component of air necessary for breathing.
Answer: Oxygen
2. What is the primary source of water on Earth?
Answer: Rain
3. What is the main component of air by percentage?
Answer: Nitrogen
4. What is a windmill used for?
Answer: To generate electricity or pump water
5. What kind of resource is sunlight?
Answer: Renewable resource
6. What is one traditional water harvesting method in India?
Answer: Stepwell or Bawadi
7. Give one example of a non-renewable natural resource.
Answer: Coal
8. What happens when we cut down forests?
Answer: It causes soil erosion and loss of biodiversity.
9. What is air pollution mainly caused by in cities?
Answer: Vehicle emissions
10. Name one mineral used in construction.
Answer: Granite
11. What does rainwater harvesting collect?
Answer: Rainwater
12. What is the main function of plant roots in soil?
Answer: To hold the soil and prevent erosion
13. Why are earthworms called farmer’s friends?
Answer: They help in loosening and enriching the soil.
14. Which festival is celebrated to raise awareness about forests?
Answer: Van Mahotsav
15. Name one clean alternative to petrol in vehicles.
Answer: CNG (Compressed Natural Gas)
Two Mark Questions (Brief Answers) – (10 Questions)
1. What are renewable resources? Give two examples.
Answer: Renewable resources are naturally replenished over time. Examples: sunlight and water.
2. Define fossil fuels and name any two.
Answer: Fossil fuels are energy resources formed from dead plants and animals over millions of years. Examples: coal and petroleum.
3. Why should we use water wisely?
Answer: Because freshwater is limited and needed for drinking, farming, and industry.
4. How does forest cover help maintain ecological balance?
Answer: Forests support biodiversity, prevent soil erosion, and purify the air.
5. What is the significance of Van Mahotsav?
Answer: It promotes tree planting and spreads awareness about forest conservation.
6. Mention two ways to conserve electricity at home.
Answer: Use LED bulbs and switch off appliances when not in use.
7. How do solar panels help the environment?
Answer: They generate clean energy without causing pollution.
8. Why is soil considered a treasure of nature?
Answer: It supports plant growth and holds essential nutrients and organisms.
9. What are two consequences of cutting down trees?
Answer: Increased air pollution and soil erosion.
10. State the difference between natural and human-made resources.
Answer: Natural resources occur in nature (like air and water), while human-made resources are created by humans (like machines and plastic).
Higher Order Thinking Skills (HOTS) – (5 Questions)
1. Why is it important to replace fossil fuels with renewable energy sources?
Answer: Fossil fuels are limited and pollute the environment. Renewable energy is clean and sustainable for future generations.
2. If forests disappear, how will it affect humans and animals?
Answer: It will cause climate imbalance, increase carbon dioxide, reduce biodiversity, and threaten food chains.
3. Suggest three ways you can reduce your carbon footprint at school.
Answer: Use less paper, promote carpooling or cycling, and plant trees.
4. What would happen if rainwater harvesting is practiced in every home?
Answer: It would reduce water scarcity, recharge groundwater, and minimize dependency on external water sources.
5. A city has severe air pollution due to vehicles. What three policies would you recommend as a city planner?
Answer: Encourage public transport, promote electric vehicles, and implement car-free zones.
