Nature’s Treasures Class 6 Questions and Answers NCERT Solutions
Class 6 Science Chapter 11 Nature’s Treasures Question Answer
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Question 1.
Figure 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.
Answer:
Question 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. [ ]
(ii) Machines are a resource found in nature. [ ]
(iii) Natural gas is a non-renewable resource. [ ]
(iv) Air is a renewable resource. [ ]
Answer:
(i) Nature has all the resources to meet human needs. [True]
(ii) Machines are a resource found in nature, [False]
Corrected statement: Machines are human-made resources.
(iii) Natural gas is a non-renewable resource. [True]
(iv) Air is a renewable resource. [True]
Question 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. _____.
(a) Kerosene
(b) Petrol
(c) Diesel
(d) LPG
Answer:
(b) Petrol
(ii) An example of a renewable resource is ______.
(a) Coal
(b) Water
(c) Natural gas
(d) Petrol
Answer:
(b) Water
Question 4.
Classify the following as renewable or non-renewable resources- coal, natural gas, forests and minerals.
Answer:
Renewable resources- forests.
Non-renewable resources- coal, natural gas and minerals.
Question 5.
Why do we say that petroleum is a non-renewable resource?
Answer:
Petroleum is a fossil fuel and it takes millions of years to form from the remains of dead plants and animals that get buried deep inside the Earth. Petroleum is limited in nature and once used, it gets exhausted and cannot be produced or replenished within a short period of time. Thus, petroleum is said to be a non-renewable resource.
Question 6.
It is difficult to regrow forests. Justify this statement.
Answer:
It is difficult to regrow forests because forests take many years, even decades, to grow back fully. Trees and plants need a lot of time to reach their full size. The soil in areas where forests have been cut down or damaged might not be good for growing new trees. It may need special care to become healthy enough for growing new plants.
Question 7.
Make a list of five daily activities in which you use natural resources. Suggest ways by which you can reduce their use.
Answer:
Five daily activities where we use natural resources are: brushing teeth, washing clothes, cooking, driving vehicles using petrol and using paper.
The ways by which we can reduce the use of natural resources are: use of solar energy like solar cookers, use of public transport, using electric vehicles, using digital documents instead of papers etc.
Question 8.
List four activities that are possible due to the presence of air.
Answer:
(a) Breathing
(b) Flying kites
(c) Rotating windmills to generate electricity
(d) Blowing balloons
Question 9.
How can you contribute towards enhancing the green cover of your locality? Make a list of actions to be taken.
Answer:
A list of actions can take to enhance the green cover in our locality are:
- Planting trees in locality.
- Practice and promote 3Rs principle (Reduce, Reuse and Recycle).
- Keep the surroundings clean and throwing garbage in dustbins only.
- Spread awareness about benefits of planting trees.
Question 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?
(ii) Name one benefit and one drawback of using this type of energy for cooking.
Answer:
(i) Solar energy
(ii) One benefit of solar energy for cooking is that it is a renewable energy source and does not cause air pollution and global warming, so it is environment friendly.
Whereas, one drawback of using solar energy for cooking is that it cannot be used during a cloudy days or night as it requires sunlight to cook food. So, solar energy is not very convenient and reliable, specially during cloudy days and nights.
Question 11.
Cutting down trees on a large scale impacts the quality of the soil. Why do you think it is so?
Answer:
Trees help keep the soil in place with their roots. When trees are removed, the soil can wash away easily during rain, leading to soil erosion. Also, trees add nutrients to the soil through their fallen leaves, which decompose and enrich the soil. Without trees, the soil may lose these important nutrients.
Question 12.
Explain two ways in which human activities pollute the air. Propose one action which can help in reducing air pollution.
Answer:
Two ways in which human activities pollute the air are
(a) when cars, buses and trucks burn fossil fuel, they produce carbon dioxide and smoke that go into the air and causes air pollution.
(b) using fossil fuels to produce electricity in houses and factories causes release of smoke and carbon dioxide, which causes air pollution.
One action which can help in reducing air pollution is using electric vehicles for transportation as it does not produce smoke, so it does not contribute to the air pollution.
Question 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?
Answer:
Solar nanels need sunlight to generate electricity. Without sunlight for a week, the solar panels would not produce any electricity. This means the family would have to find another way to generate electricity. A gas stove does not rely on sunlight to cook food, so it would still work normally. Windmills depend on wind to pump water, and not on sunlight, so it will also remain unaffected in this case.
Question 14.
Fill up the blanks using the following terms(fossil fuels, forest, air, petroleum, coal, water and non-renewable resources)
Answer:
Question 15.
There is an increasing demand of trees to meet the requirements of industries and for housing. Therefore, trees are being felled. Is it justifled? Discuss and prepare a brief report.
Answer:
Report
Introduction Trees are very important for our environment. They provide us with clean air, shade, and many other benefits. However, there is a growing demand for trees to meet the needs of industries and for housing. This means more trees are being cut down, which can cause problems.
Problems Caused by Cutting Down of Trees
- Loss of homes: Animals lose their homes when trees are cut.
- Soil Erosion: Without tree roots to hold the soil in place, it can wash away easily by rain, leading to erosion.
- Climate Change: Trees help absorb carbon dioxide and produce oxygen. Cutting them down can increase the amount of carbon dioxide in the air, contributing to global warming, which in turn causes climate change.
- Less oxygen: Fewer trees mean less oxygen for humans and animals to breathe.
Is It Justified?
While it is important to meet the needs of people, it is also crucial to balance this with the conservation of trees.
What Can We Do?
(a) Plant More Trees: Replanting trees can help replace those that have been cut down.
(b) Use Resources Wisely: Reduce, reuse, and recycle materinis, like paper and wood, to lower the need for new trees.
(c) Choose alternative materials for housing and industrial need, where ever possible.
Conclusion : While there is a demand for trees to meet the requirements of industries and housing, it is important to ensure that this is done in a way that protects our environment. By planting more trees and using resources wisely, we can help in balancing human needs with the conservation of natural resources.
Question 16.
Propose a plan to use less water in your school. What steps would you take to maine this plan happen and how would it help the environment?
Answer:
Steps to use less water in school are:
(i) Fix leaks in taps.
(ii) Turning off taps when not in use
(iii) Use rain water harvesting to collect rain water and use it for other cleaning purposes.
(iv) Use sprinklers in school garden for watering plants rather than the water pipes.
(v) Spread awareness among the students regarding importance of saving water.
These steps helps the environment by reducing wastage of water. This helps in the conservation of water and makes sure that the water is available for future use.
NCERT Solutions for Class 6 Science Chapter 11 Nature’s Treasures
Intext Questions
Question 1.
Can you think of some uses of water in your daily life? (Page 211)
Answer:
Some uses of water in daily life are drinking, cooking, cleaning utensils, bathing, brushing teeth, washing clothes, gardening etc.
Question 2.
What are some of the activities for which we need heat and light from the Sun? (Page 214)
Answer:
We need heat and light from the Sun for drying clothes, growing plants, making of food by the plants, staying warm, generating solar energy which can be used by solar panels, evaporation of water from the oceans (water cycle) etc.
Question 3.
What will happen if the Sun is not visible for a few days? (Page 216)
Answer:
If the Sun is not visible for a few days, there will be darkness during the day, cold temperature, affect on the growth and food production of the plants etc.
Question 4.
Make a list of at least five products that we get from forests. (Page 217)
Answer:
Wood, fruits, rubber, paper and honey.
Question 5.
Do you know how rocks and minerals are transported from one location to another? (Page 221)
Answer:
Rocks and minerals can be transported from one place to another in several ways. When it rains, water in rivers and lakes can carry small rocks and minerals. The flowing water moves these materials from one place to another. Wind can also blow small particles of rocks and minerals from one place to another.
Question 6.
Suggest some ways to conserve the fossil fuels. (Page 223)
Answer:
Fossil fuels can be conserved by-
- using public transport.
- Walking or cycling to nearby places.
- Sharing car rides with friends and family going to the same place (car pooling).
- using renewable energy sources, like solar energy and wind energy.
- Following 3Rs principle: Reduce, Reuse and Recycle.
Question 7.
Can you list some alternatives for reducing air pollution? (Page 224)
Answer:
Using electric vehicles, car pooling, using public transport, walking or taking bicycles for small distances, etc.
Let’s Investigate
Activity 1 (Page 208)
Aim :To prove that we need oxygen for our survival
Materials Required Nothing required.
Procedure :
- Take a deep breath in and then breathe out slowly.
- Take a deeper breath in again.
- Hold your breath for as long as you can and then breathe out slowly.
Observation : We observe that it is difficult to hold our breathe for a long time.
Conclusion : We can conclude that the air we breathe in has oxygen, and when we hold our breathe for a long time, the body does not get enought oxygen. Oxygen is essential to perform body’s functions. Thus, we need oxygen for our survival.
Viva Questions :
1. Name some gases other than oxygen present in the air.
2. What is use of oxygen in the air?
Activity 2 (Page 209-210)
Aim : To observe the rotation of a firki (paper pinwheel) by wind.
Materials Required Square paper of size 15 × 15(cm), a pair of scissors, an all-pin and a soft stick.
Procedure :
1. Cut the square paper with scissors by following steps (1 to 5) shown below.
2. Hold the firki in hand and run or keep it in front of blowing air.
Observation : Firki starts to rotate when blowing air passes through it.
Conclusion : Wind can rotate firki or things similar to it like windmills.
Viva Questions :
1. How can you rotate firki in a closed room?
2. What is blowing air caused ?
Activity 3 (Page 212)
Aim : To observe the wastage of water in our daily activities.
Materials Required Clothes, utensils, vegatables, plants, brush.
Procedure :
- Carry out the daily activities like hand washing, washing clothes, washing utensils, cooking, etc in your house.
- Observe how water is wasted while carrying out the above activities.
- Make a table with columns of how water is wasted and suggest ways to reduce wastage of water.
Observation : Water being wasted in our daily activities.
Result The table of wastage of water in our daily activities is given below.
Hence, there are many ways to reduce wastage of water.
Viva Questions :
1. What are the activities in our daily life which leads to wastage of water?
2. What are the ways of saving water?
Activity 4 (Page 218-219)
Aim : To observe different types of soil.
Materials Required Different samples of soil.
Procedure :
1. Collect different samples of soils from different areas around your school and home.
2. Observe each soil sample carefully and note its colour.
Observation : We observe that the soil samples collected from different places have different colours.
Conclusion : We can conclude that the soil samples are of different colours because they contain different materials. Also, there are different types of soils.
Viva Questions :
1. How is soil formed?
2. What are the uses of soil?
Activity 5 (Page 222-223)
Aim : To find out the type of fuels used by different type of vehicles.
Materials Required Different type of vehicles.
Procedure :
- Conduct a survey of vehicles in your neighbourhood.
- Observe the different types of fuels they used.
- Record the information.
Observation : Different types of vehicles use different types of fuels as given in the following table.
| Type of vehicle | Type of Fuel used |
| Two wheelers | Petrol |
| Autorickhaws | Diesel, CNG |
| Cars, | Petrol, diesel, |
| Buses | Diesel, CNG, |
| Trucks, Lorries. | Diesel. |
Conclusion Petrol and diesel are the two most widely used fuels for vehicles.
Viva Questions :
1. What are fossil fuels?
2. Name the fuel which cleaner than petrol or diesel.
Activity 6 (Page 225)
Aim : To find out the natural resources use in our daily life.
Materials Required Clothes, clay toys, firewood, kites, food.
Procedure :
1. Carry out the different activities like wash clothes, make clay toys, collect firewood, make kites etc.
2. Make a list of these activities and write down the natural resources that were used directly or indirectly.
Observation : Many natural resources like air, water, soil are used in our everyday life.
Result The natural resources use in our daily life are given in following take.
| Activity | Natural resource |
| 1. Washing clothes | Water |
| 2. Making clay toys | Soil |
| 3. Collecting firewood | Wood |
| 4. Making kites | Resilient Bamboo |
| 5. Having breakfast | Water |
Viva Questions :
1. How do we get the resources like air, water, soil, etc.
2. Why do we need to conserve our natural resources?
Do it Yourself (DIY)
1. Aim To observe the traditional water harvesting practices in your locality.
2. Aim To observe the renewable and non-renewable resources used in our daily life.