Chapter 11 of Class 6 Science, Nature’s Treasures, explains the basic features that make an organism live. Through simple questions and answers, students can easily understand this chapter.
Let Us Enhance Our Learning
1. Fig. 11.9 shows items related to natural resources. Match them with their jumbled-up names. Make another table and write the names of these resources. Classify these resources as renewable or non-renewable.
Jumbled words:
- ocrk → rock
- atwre → water
- ot → oil
Table:
| Resource | Renewable / Non-renewable |
| Rock | Non-renewable |
| Water | Renewable |
| Oil (Petroleum) | Non-renewable |
2. State whether the following statements are True [T] or False [F]. If False, correct them.
(i) Nature has all the resources to meet human needs.
[T]
(ii) Machines are a resource found in nature.
[F]
Correction: Machines are man-made resources.
(iii) Natural gas is a non-renewable resource.
[T]
(iv) Air is a renewable resource.
[T]
3. Fill in the blanks using the most appropriate option-
(i) A fuel that is commonly used in two wheelers like scooters or bikes is (b) Petrol
(ii) An example of a renewable resource is (b) Water
4. Classify the following as renewable or non-renewable resources—coal, natural gas, forests and minerals.
- Coal – Non-renewable
- Natural gas – Non-renewable
- Forests – Renewable
- Minerals – Non-renewable
5. Why do we say that petroleum is a non-renewable resource?
Petroleum is called a non-renewable resource because it takes millions of years to form and once used, it cannot be replaced quickly.
6. It is difficult to regrow forests. Justify this statement.
Forests take many years to grow. Trees need proper soil, water and climate. Once forests are cut down, it takes decades to regrow them.
7. Make a list of five daily activities in which you use natural resources. Suggest ways by which you can reduce their use.
Activities:
- Drinking water
- Cooking food (LPG)
- Using electricity
- Travelling in vehicles
- Using paper
Ways to reduce use:
- Save water
- Switch off lights when not needed
- Use public transport
- Recycle paper
- Avoid wastage of fuel
8. List four activities that are possible due to the presence of air.
- Breathing
- Burning of fuels
- Flying of kites and airplanes
- Movement of windmills
9. How can you contribute towards enhancing the green cover of your locality? Make a list of actions to be taken.
- Plant more trees
- Take care of plants
- Stop cutting trees
- Spread awareness
- Participate in plantation drives
10. In the given illustration, we see that food is being cooked. Answer the following questions-
(i) What type of energy is being used for cooking?
Heat energy (from LPG or fuel)
(ii) Name one benefit and one drawback of using this type of energy for cooking.
Benefit: Cooks food quickly.
Drawback: Produces pollution.
11. Cutting down trees on a large scale impacts the quality of the soil. Why do you think it is so?
Trees hold soil with their roots. When trees are cut, soil erosion increases and soil becomes less fertile.
12. Explain two ways in which human activities pollute the air. Propose one action which can help in reducing air pollution.
Two ways:
- Smoke from vehicles
- Smoke from factories
One action: Use public transport or plant more trees.
13. A family uses solar panels to generate electricity, a gas stove to cook food and a windmill for pumping water from a well. What would happen if there were no sunlight for a week?
Solar panels would not produce electricity. The family would need another source of electricity.
14. Fill up the blanks using the following terms—(fossil fuels, forest, air, petroleum, coal, water and non-renewable resource)
Natural Resources: air, water, forest
Renewable Resources: forest, water
Natural gas is a: fossil fuel
Petroleum and coal are: non-renewable resources
15. There is an increasing demand of trees to meet the requirements of industries and for housing. Therefore, trees are being felled. Is it justified? Discuss and prepare a brief report.
No, it is not justified. Cutting too many trees causes deforestation, soil erosion and climate change. Instead, we should plant more trees and use resources carefully.
16. Propose a plan to use less water in your school. What steps would you take to make this plan happen and how would it help the environment?
Plan:
- Repair leaking taps
- Use buckets instead of running taps
- Spread awareness among students
- Collect rainwater
Benefit:
It will save water and protect the environment.