Nature’s Treasures Chapter 11 Class 6th

Class 6 Science – Nature’s Treasures

1. Fig. 11.9 shows items related to natural resources. Match them with their jumbled up names. Make a table listing these resources and classify them as renewable or non‐renewable.

Answer: Resources can be classified as: Renewable: Water, Air, Forest. Non-renewable: Coal, Petroleum, Minerals. Match the jumbled names accordingly.

Resource	Classification
Water	Renewable
Air	Renewable
Forest	Renewable
Coal	Non-renewable
Petroleum	Non-renewable
Minerals	Non-renewable

2. Mark each statement True (T) or False (F). If False, correct them:

• (i) Nature has all the resources to meet human needs.
  Answer: False. Nature’s resources are limited; some are not sufficient for human needs.
• (ii) Machines are a resource found in nature.
  Answer: False. Machines are man-made; they are not naturally found.
• (iii) Natural gas is a non-renewable resource.
  Answer: True. Natural gas is non-renewable and depletes over time.
• (iv) Air is a renewable resource.
  Answer: True. Air is renewable as it is continuously recycled by nature.

3. Fill in the blanks using the most appropriate option:

• (i) A fuel commonly used in two wheelers like scooters or bikes is:
  (a) Kerosene
  (b) Petrol
  (c) Diesel
  (d) LPG
  Answer: Option (b) Petrol.
• (ii) An example of a renewable resource is:
  (a) Coal
  (b) Water
  (c) Natural gas
  (d) Petrol
  Answer: Option (b) Water.

4. Classify the following as renewable or non-renewable resources—coal, natural gas, forests, and minerals.

Coal, natural gas, and minerals are non-renewable; forests are renewable. Non-renewable resources take millions of years to form and cannot be quickly replenished.

5. Why do we say that petroleum is a non-renewable resource?

Petroleum takes millions of years to form and cannot be replenished quickly. It is depleted by heavy industrial use, making its reserves limited and valuable.

6. It is difficult to regrow forests. Justify this statement.

Forest regrowth is slow due to long growth periods and changing environmental conditions. Human activity and deforestation further delay natural recovery and limit biodiversity.

7. List five daily activities where natural resources are used. Suggest ways to reduce their use.

• Bathing – uses water; fix leaks and reduce shower time.
• Lighting – uses electricity; switch to energy-efficient bulbs.
• Transport – uses fuel; carpool or use public transport.
• Studying – uses paper; use digital notes or recycled paper.
• Cooking – uses gas and electricity; cook in batches and conserve energy.

8. List four activities that are possible because of air.

• Breathing – essential for life.
• Sound transmission – enables hearing and communication.
• Fire combustion – provides heat and energy.
• Plant pollination – aids in reproduction and biodiversity.

9. How can you contribute to enhancing the green cover in your locality? List actions to be taken.

Plant trees, maintain gardens, avoid burning waste, join local clean-ups, and promote community recycling. These actions help improve our environment and green cover.

10. In the illustration, food is being cooked. (i) What type of energy is used for cooking? (ii) Name one benefit and one drawback of this energy.

(i) Chemical energy from burning fuel is used to cook food.
(ii) Benefit: Quick heating permits prompt meals; Drawback: It causes pollution and high fuel costs.

11. Cutting down trees on a large scale impacts soil quality. Why is that?

Trees hold soil in place and provide organic matter. Their removal leads to soil erosion, reduces nutrient levels, and decreases overall fertility.

12. Explain two ways human activities pollute air. Propose one action to reduce air pollution.

Human activities release smoke from factories and exhaust from vehicles, which pollute the air. Using public transport and planting more trees can help reduce pollution.

13. A family uses solar panels, a gas stove, and a windmill. What happens if there is no sunlight for a week?

Without sunlight, solar panels cannot generate electricity. The family must rely on alternative energy sources while the gas stove and windmill continue operating independently.

14. Fill the blanks using these terms: fossil fuels, forest, air, petroleum, coal, water, and nonrenewable resource.

Coal and petroleum are examples of fossil fuels, which are nonrenewable resources. Forest, water, and air are renewable resources that support life.

15. Trees are increasingly cut for industries and housing. Is it justified? Discuss briefly.

Felling trees for industry and housing is not fully justified. Overcutting harms the environment by reducing oxygen production and wildlife habitats. Sustainable practices and reforestation are necessary.

16. Propose a plan to use less water in your school. What steps would you take, and how would this help the environment?

Install water-saving taps, fix leaks, and recycle water for gardening. Educate students about conservation. These actions will reduce wastage and protect our environment.