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Class 6 Science Chapter 11 Nature’s Treasures Notes & Solutions

Class 6 Science Chapter 11 Nature’s Treasures notes and NCERT solutions. Get easy concepts, book solutions, important questions, answers and revision material.

Nature’s Treasures

Class VI Science (Curiosity) Fresh Worksheet

Chapter 11

Student Details

Name:
Class:VI
Section:
Date:
Instructions: Read every question carefully. Write complete answers wherever required. Use examples from your surroundings whenever possible.

Section A: Multiple Choice Questions

1. Which of the following is a renewable resource?
A. Coal
B. Petroleum
C. Sunlight
D. Natural gas
2. Which resource is formed over a very long period of time?
A. Wind
B. Coal
C. Sunlight
D. Rainwater
3. Approximately what fraction of Earth’s surface is covered by water?
A. About 10%
B. About 30%
C. About 71%
D. About 95%
4. Which process changes water vapour into tiny water droplets?
A. Evaporation
B. Condensation
C. Melting
D. Freezing
5. Which of these helps in increasing groundwater recharge?
A. Rainwater harvesting
B. Cutting trees
C. Throwing waste into drains
D. Leaving taps open
6. Which gas is needed by green plants for photosynthesis?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
7. Which natural resource provides habitat for many plants and animals?
A. Forest
B. Petrol
C. Plastic
D. Cement
8. Which of the following is a fossil fuel?
A. Wind
B. Coal
C. Sunlight
D. Flowing water
9. Which organisms are important in decomposition?
A. Microorganisms
B. Only birds
C. Only fish
D. Only reptiles
10. Which movement is associated with protection of trees by hugging them?
A. Green Revolution
B. Chipko Movement
C. White Revolution
D. Space Movement

Section B: Fill in the Blanks

1. Resources obtained directly from nature are called __________ resources.
2. Coal, petroleum and natural gas are examples of __________ fuels.
3. The continuous movement of water between Earth and the atmosphere is called the __________.
4. Collecting and storing rainwater for later use is called __________.
5. The variety of living organisms in an area is called __________.
6. The breaking down of dead organic matter into simpler substances is called __________.
7. LPG is commonly used for cooking and __________.
8. The Sun is the main source of energy for __________ on Earth.

Section C: True or False

Write True or False.

StatementAnswer
1. Petroleum can be formed again within a few years.
2. Forests provide habitats for many organisms.
3. Water is present only in rivers and lakes.
4. Rainwater harvesting can help conserve water.
5. Soil formation is a very rapid process.
6. Plants depend on sunlight to make food through photosynthesis.
7. CNG is a fossil-fuel based cleaner-burning vehicle fuel.
8. Cutting forests on a large scale can disturb ecosystems.
9. All natural resources are unlimited.
10. Decomposers help return nutrients to the soil.

Section D: Match the Following

Column AColumn B
1. CoalA. Variety of life
2. Rainwater harvestingB. Traditional tree protection movement
3. BiodiversityC. Fossil fuel
4. Chipko MovementD. Collecting rainwater
5. DecompositionE. Breakdown of organic matter
6. Solar energyF. Energy from the Sun
7. EcosystemG. Living organisms and their surroundings interacting together
8. MineralsH. Naturally occurring substances used for many purposes

Section E: Classify the Resources

Write R for renewable and NR for non-renewable.

ResourceR / NR
Sunlight
Coal
Forests
Petroleum
Wind
Natural gas
Minerals
Water

Section F: Very Short Answer Questions

1. What is meant by a natural resource?
2. Give two examples of renewable resources.
3. Give two examples of non-renewable resources.
4. Name two sources of fresh water.
5. What is rainwater harvesting?
6. What is biodiversity?
7. What is an ecosystem?
8. Name two products obtained from forests.
9. What are minerals?
10. Name two fuels commonly used in vehicles.

Section G: Short Answer Questions

1. Why should natural resources be used carefully?
2. Why is petroleum called a non-renewable resource?
3. How does a forest help protect soil?
4. Explain two ways in which people can conserve water at home.
5. How does decomposition help an ecosystem?
6. Why are forests important for biodiversity?
7. How can excessive use of fossil fuels affect the environment?
8. What is sustainable development?

Section H: Think and Answer

1. A tap in a school washroom keeps dripping throughout the day. Why is this a problem? Suggest two solutions.
2. A forest is cleared to construct many buildings. Predict three changes that may occur in the area.
3. A village receives heavy rainfall for a few days but faces water shortage later. How could rainwater harvesting help the villagers?
4. Your friend says, “The Sun gives us light, but it is not connected with other natural resources.” Do you agree? Explain.
5. Why can planting trees be helpful even though trees cannot immediately replace a mature forest?

Section I: Case-Based Questions

Case Study 1: Water Conservation

A school noticed that a large quantity of water was being wasted because some taps were left open after students used them. The school repaired leaking taps, placed reminders near water points and started collecting rainwater from the roof.

a. Name one source of water mentioned in the case.
b. Which method is being used to collect rainwater?
c. Write two other ways by which the school could save water.
d. How does saving water help the environment?

Case Study 2: Forest Conservation

A village depends on a nearby forest for fruits, medicinal plants, fuelwood and other useful materials. The villagers decide to stop unnecessary cutting of trees and plant new trees in degraded areas.

a. Write two benefits the villagers receive from the forest.
b. Why should unnecessary cutting of trees be avoided?
c. How can new trees help the village in the future?

Section J: Observe and Reason

Sun Plant Soil
1. Which natural resource is represented by the yellow object?
2. Why do plants need sunlight?
3. How are plants connected with soil?
4. Explain how natural resources are interconnected.

Section K: Application-Based Questions

1. Your family wants to reduce its use of fossil fuels. Suggest four practical actions.
2. You notice plastic waste being thrown near a local water body. What problems could this create? What would you do?
3. Suggest five actions that students can take to increase the green cover around their school.
4. A locality has very little groundwater during summer. Suggest a simple community plan to improve water availability.

Section L: Activity Corner

Activity 1: Natural Resource Survey

Look around your home or classroom. List five natural resources that are being used directly or indirectly.

ResourceWhere is it used?How can we save it?

Activity 2: Water Wastage Check

Observe your home or school for one day. Identify three situations where water may be wasted.

PlaceHow water is wastedSuggested solution

Activity 3: Tree Plantation Plan

Prepare a simple plan for planting trees in your school.

Step 1: Choose a suitable place.
Step 2: Select suitable tree species.
Step 3: Arrange tools and planting material.
Step 4: Plan regular watering and care.
Step 5: Decide how students will monitor the plants.

Section M: Challenge Questions

1. Why is a resource considered renewable only when its use does not exceed its natural rate of replacement?
2. Imagine that all forests in your region disappeared. Describe four effects that could follow.
3. Explain how the Sun, plants, animals, soil and decomposers are connected in an ecosystem.
4. Why should renewable energy sources be developed even though fossil fuels are still available?
5. A windmill can work when there is sufficient wind even if the Sun is hidden by clouds. Explain why.

Section N: Quick Revision Grid

TopicRemember
Natural resourcesUseful materials or forms of energy obtained from nature.
Renewable resourcesResources that can be replenished naturally within a reasonable period when properly managed.
Non-renewable resourcesLimited resources that take extremely long periods to form.
Water conservationUsing water carefully and preventing unnecessary wastage.
Rainwater harvestingCollecting and storing rainwater for later use or groundwater recharge.
ForestProvides habitat, food, useful products, soil protection and many ecosystem benefits.
SoilForms slowly through weathering of rocks and the addition and breakdown of organic matter.
Fossil fuelsCoal, petroleum and natural gas; formed over millions of years.
BiodiversityThe variety of living organisms in an area.
ConservationProtection and responsible use of resources.

Answer Key

Section A: MCQs

1. C
2. B
3. C
4. B
5. A
6. C
7. A
8. B
9. A
10. B

Section B: Fill in the Blanks

1. natural
2. fossil
3. water cycle
4. rainwater harvesting
5. biodiversity
6. decomposition
7. heating
8. life

Section C: True or False

1. False
2. True
3. False
4. True
5. False
6. True
7. True
8. True
9. False
10. True

Section D: Match the Following

1. C
2. D
3. A
4. B
5. E
6. F
7. G
8. H

Section E: Classification

Sunlight — R
Coal — NR
Forests — R
Petroleum — NR
Wind — R
Natural gas — NR
Minerals — NR
Water — R when naturally replenished and responsibly managed

Suggested Answers: Sections F and G

1. A natural resource is something obtained from nature that is useful to living beings or people.

2. Sunlight and wind are examples of renewable resources.

3. Coal and petroleum are examples of non-renewable resources.

4. Rainwater and groundwater are sources of fresh water.

5. Rainwater harvesting means collecting and storing rainwater for later use or for helping groundwater recharge.

6. Biodiversity means the variety of living organisms found in a particular area.

7. An ecosystem consists of living organisms and the non-living surroundings with which they interact.

8. Timber and fruits are two products obtained from forests.

9. Minerals are naturally occurring inorganic substances with characteristic composition and structure.

10. Petrol and diesel are commonly used vehicle fuels. Some vehicles also use CNG or electricity.

11. Natural resources should be used carefully because many are limited and excessive use can damage ecosystems.

12. Petroleum takes millions of years to form, so it cannot be replaced quickly after being used.

13. Tree roots help hold soil together and reduce soil erosion. Forest vegetation also slows the movement of rainwater.

14. Water can be saved by repairing leaking taps, using only the required amount, reusing suitable water and avoiding unnecessary running of taps.

15. Decomposition breaks down dead material and returns useful nutrients to the environment and soil.

16. Forests provide food and shelter for many organisms, so their protection supports biodiversity.

17. Excessive fossil-fuel use can increase air pollution and greenhouse-gas emissions.

18. Sustainable development means meeting present needs while keeping enough resources and a healthy environment for future generations.

Teacher’s Note

This worksheet uses fresh questions and explanations for practice. Students should try the questions independently before checking the answer key.

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