NCERT Question-Answer Solution for Class 6 Science Chapter 11 – Nature’s Treasures
Complete NCERT Question–Answer Set for Class 6 Science (Curiosity Textbook) – Chapter 11: Nature’s Treasures
Class 6 Science NCERT Solution – Chapter 11: Nature’s Treasures
Nature’s Treasures – Full NCERT Question–Answer Solution (CBSE Class 6 Science – Curiosity Book)
SECTION 1: LET US ENHANCE OUR LEARNING – QUESTIONS & ANSWERS
Q1. 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.
Items: ocrk, refost, ndiw, atwre
Answer:
ocrk → rock (Non-renewable)
refost → forest (Renewable)
ndiw → wind (Renewable)
atwre → water (Renewable)
Q2. State whether the following statements are True or False. Correct the false statements.
(i) Nature has all the resources to meet human needs.
Answer: True.
(ii) Machines are a resource found in nature.
Answer: False.
Correct statement: Machines are human-made resources, not natural.
(iii) Natural gas is a non-renewable resource.
Answer: True.
(iv) Air is a renewable resource.
Answer: True.
Q3. Fill in the blanks using the most appropriate option.
(i) A fuel commonly used in two-wheelers is ______.
Options: Kerosene, Petrol, Diesel, LPG
Answer: Petrol
(ii) An example of a renewable resource is ______.
Options: Coal, Water, Natural gas, Petrol
Answer: Water
Q4. Classify the following as renewable or non-renewable resources: coal, natural gas, forests, minerals.
Answer:
Coal – Non-renewable
Natural gas – Non-renewable
Forests – Renewable
Minerals – Non-renewable
Q5. Why do we say that petroleum is a non-renewable resource?
Answer:
Petroleum takes millions of years to form and is available in limited quantities. Once used, it cannot be replaced quickly; therefore, it is non-renewable.
Q6. It is difficult to regrow forests. Justify this statement.
Answer:
Forests take many years to grow. New trees require time to mature, and biodiversity rebuilds slowly. Cutting forests destroys soil, habitats, and ecological balance, making regrowth difficult.
Q7. Make a list of five daily activities in which you use natural resources. Suggest ways to reduce their use.
Answer:
Activities and ways to reduce:
- Brushing teeth – Close tap while brushing.
- Bathing – Take bucket baths instead of long showers.
- Cooking – Use energy-efficient stoves.
- Travelling – Use cycles or public transport.
- Washing clothes – Use water judiciously, avoid wastage.
Q8. List four activities that are possible due to the presence of air.
Answer:
- Breathing
- Burning
- Movement of windmills
- Flying of kites and birds
Q9. How can you contribute towards enhancing the green cover of your locality? Make a list of actions to be taken.
Answer:
- Plant trees in empty spaces.
- Protect existing plants.
- Water plants regularly.
- Create awareness about tree planting.
- Participate in community tree drives.
Q10. In the illustration, food is being cooked.
(i) What type of energy is being used?
(ii) Name one benefit and one drawback of using this type of energy.
Answer:
(i) Solar energy
(ii) Benefit: Environment-friendly and free.
Drawback: Cannot be used at night or on cloudy days.
Q11. Cutting down trees on a large scale impacts soil quality. Why?
Answer:
Tree roots hold soil. Without trees, soil erodes, loses nutrients, and becomes infertile.
Q12. Explain two ways in which human activities pollute the air. Propose one action to reduce air pollution.
Answer:
Pollution ways:
- Burning fossil fuels.
- Industrial smoke.
Action: Use public transport or bicycles to reduce emissions.
Q13. A family uses solar panels, gas stove and windmill. What would happen if there were no sunlight for a week?
Answer:
Solar panels would not generate electricity. Other energy sources like gas and wind would still work but solar appliances would stop functioning.
Q14. Fill up the blanks using the words (fossil fuels, forest, air, petroleum, coal, water, non-renewable resource)
Answer:
Natural Resources → air, water, forest
Renewable Resources → air, water, forest
Non-renewable Resources → coal, petroleum, fossil fuels
Q15. Trees are being cut to meet industrial demand. Is it justified? Prepare a brief report.
Answer:
No, it is not justified. Cutting trees causes soil erosion, reduces rainfall, destroys habitats, increases pollution, and harms biodiversity. Sustainable alternatives must be used.
Q16. Propose a plan to use less water in your school. What steps would you take? How will it help the environment?
Answer:
Plan:
- Fix leaking taps.
- Install water-saving taps.
- Use collected rainwater for gardening.
- Awareness campaigns.
Helps environment: Conserves freshwater, reduces wastage, protects water bodies.
SECTION 2: IN-CHAPTER TEXT QUESTIONS (WITH ANSWERS)
Q1. How long can you hold your breath? How do you feel when you hold your breath?
Answer:
We can hold our breath for a few seconds. We feel uncomfortable because the body needs oxygen.
Q2. What makes a firki rotate?
Answer:
Moving air or wind rotates the firki.
Q3. Can you think of more uses of water in daily life?
Answer:
Yes, washing clothes, bathing, cooking, watering plants, cleaning floors.
Q4. What conclusion can you draw from Table 11.1 on water wastage?
Answer:
Water is wasted in many activities. We must reduce wastage by closing taps, reusing water, and avoiding unnecessary use.
Q5. Identify human activities that lead to water pollution.
Answer:
Throwing plastic, industrial waste, chemicals, sewage into water bodies.
Q6. What will happen if the Sun is not visible for a few days?
Answer:
We will need artificial lights. Plants will not make food. Some solar appliances will stop working.
Q7. According to Bhoomi and Surya, which statement about energy from the Sun is correct?
Answer:
Bhoomi’s statement is correct. The cow gets energy from plants, and plants get energy from the Sun.
Q8. What are some activities that need sunlight?
Answer:
Drying clothes, drying chilies, plant growth, using solar cookers.
Q9. Discuss five products that we get from forests.
Answer:
Wood, fruits, honey, medicinal plants, rubber.
Q10. What differences do you observe in soil samples?
Answer:
Colour, texture, presence of pebbles, organic matter, insects.
Q11. Which fuels are widely used in vehicles?
Answer:
Petrol and diesel.
Q12. Suggest ways to conserve fossil fuels.
Answer:
Use public transport, walk or cycle, use renewable energy.
SECTION 3: ACTIVITY-BASED QUESTIONS (WITH ANSWERS)
Q1. Activity 11.1 – What do we learn about breathing from this activity?
Answer:
It shows our body needs oxygen continuously; we cannot hold breath for long.
Q2. Activity 11.2 – What makes the firki rotate?
Answer:
Wind causes rotation.
Q3. Activity 11.3 – What actions reduce water wastage?
Answer:
Close taps, use buckets, fix leaks, reuse water for plants.
Q4. Activity 11.4 – What differences do you notice in soil using a magnifying lens?
Answer:
We can see more particles, small insects, grains, and organic matter not visible to the naked eye.
Q5. Activity 11.5 – What are the common types of fuels used in vehicles?
Answer:
Petrol, diesel, CNG.
Q6. Activity 11.6 – Which natural resources are used in daily activities?
Answer:
Air, water, soil, sunlight, plants, animals.
SECTION 4: ADDITIONAL NCERT-STYLE REASONING QUESTIONS (WITH ANSWERS)
Q1. Why is air considered a renewable resource?
Answer:
Air is continuously replenished through natural cycles like photosynthesis and wind movement.
Q2. Why do we need to conserve water even though Earth has so much of it?
Answer:
Most water is salty. Only a small portion is freshwater, and even less is easily accessible.
Q3. Why is it harmful to burn fossil fuels?
Answer:
They release smoke and carbon dioxide, causing air pollution and global warming.
Q4. How do forests maintain soil fertility?
Answer:
Dead leaves decay into humus and enrich soil nutrients.
Q5. Why is the Sun called the main source of energy on Earth?
Answer:
Plants use sunlight to make food; animals depend on plants; all energy chains start with the Sun.