Welcome to BodhiClasses, your trusted platform for concept-based and value-driven learning. We simplify complex science concepts and align them with everyday life to foster deep understanding in young learners. In this post, we present complete and accurate NCERT solutions for Class 6 Science Chapter 11 – Nature’s Treasures, designed to build awareness about the natural resources that sustain life on Earth.
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 and Answers:
| Jumbled Name | Correct Name | Type of Resource |
|---|---|---|
| ocrk | rock | Non-renewable resource |
| refost | forest | Renewable resource |
| ndiw | wind | Renewable resource |
| atwre | water | Renewable resource |
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 human-made resources, not found in nature.
(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 from the remains of ancient plants and microorganisms. Once used, it cannot be replaced in a short span of time.
6. It is difficult to regrow forests. Justify this statement.
Forests take decades to grow naturally and support a balanced ecosystem. Once cut down, the soil quality, biodiversity, and climate conditions may change, making it difficult to restore them to their original state quickly.
7. Make a list of five daily activities in which you use natural resources. Suggest ways by which you can reduce their use.
| Daily Activity | Natural Resource Used | Way to Reduce Usage |
|---|---|---|
| Brushing teeth | Water | Turn off tap while brushing |
| Travelling to school | Petrol/Diesel | Use bicycle or public transport |
| Lighting a room | Electricity | Use LED bulbs, switch off lights |
| Cooking food | LPG/Natural gas | Cook with lid, use solar cooker |
| Using paper notebooks | Trees (wood) | Write on both sides, recycle |
8. List four activities that are possible due to the presence of air.
- Breathing by humans and animals
- Flying of kites and airplanes
- Generation of electricity using windmills
- Photosynthesis by plants using carbon dioxide
9. How can you contribute towards enhancing the green cover of your locality? Make a list of actions to be taken.
- Participate in tree plantation drives
- Take care of plants in the neighborhood
- Avoid plucking leaves and flowers unnecessarily
- Educate others about the importance of green spaces
- Encourage local authorities to create parks and plant trees
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?
Solar energy
(ii) Name one benefit and one drawback of using this type of energy for cooking.
Benefit: Environmentally friendly and reduces fuel cost.
Drawback: Not usable during cloudy or rainy days.
11. Cutting down trees on a large scale impacts the quality of the soil. Why do you think it is so?
Trees hold the soil together with their roots. When trees are cut, the soil becomes loose and is easily washed away by rainwater, leading to soil erosion and loss of fertility.
12. Explain two ways in which human activities pollute the air. Propose one action which can help in reducing air pollution.
Two ways:
- Burning of fossil fuels in vehicles and factories
- Burning garbage and crop residues
Action to reduce: Use public transport or electric vehicles to reduce emissions.
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?
Without sunlight, the solar panels would not generate electricity. This would affect lighting and other appliances dependent on solar power. Also, food drying and water heating through solar energy would be disrupted.
14. Fill up the blanks using the following terms— (fossil fuels, forest, air, petroleum, coal, water and non-renewable resource)
Example answer (depends on the original sentence, but here is a generic fill-in format):
- Trees grow in the forest.
- We breathe air to survive.
- Water is used for drinking and farming.
- Petroleum is a kind of fossil fuel.
- Coal is a non-renewable resource.
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.
While development is necessary, cutting trees on a large scale leads to deforestation, loss of biodiversity, climate imbalance, and soil erosion. Sustainable development practices like afforestation, using eco-friendly materials, and strict regulations on tree felling must be implemented.
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 to Reduce Water Usage in School:
- Install sensor-based taps to minimize water waste.
- Conduct awareness sessions for students and staff.
- Fix leaking pipes and taps immediately.
- Reuse water from handwashing for gardening.
- Collect rainwater for cleaning purposes.
Environmental Benefits:
- Saves freshwater resources
- Reduces dependency on groundwater
- Promotes responsible behavior in students
