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.
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.
Natural resources
Answer:
| Resource | Category |
| Water | Renewable resource |
| Wind | Renewable resource |
| Forest | Renewable resource |
| Rock | Non-renewable resource |
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.
Answer:
True
(ii) Machines are a resource found in nature.
Answer:
False;
Machines are a resource created by human beings.
(iii) Natural gas is a non-renewable resource.
Answer:
True
(iv) Air is a renewable resource.
Answer:
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 takes millions of years to form. It is found in limited quantities and once used, it gets exhausted. It cannot be produced or replenished within a reasonable period of time. Hence, petroleum is called non-renewable resource.
Question 6.
It is difficult to regrow forests. Justify this statement.
Answer:
Though forests are renewable natural resource and nature keeps on renewing them. But indiscriminate felling of trees makes it difficult to regrow forests. Forest are being destructed to use the land for cultivation, building houses, factories, making space for cattle grazing, extraction of oil, mining, construction of dams or to obtain wood for making furniture and using it as fuel. If we keep on doing so, it would become difficult to regrow forests. Additionally, the ecological balance and biodiversity that develop in a forest over centuries cannot be easily replicated. Therefore, we must preserve and use forests responsibly so that they get enough time to regenerate.
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:
- We use water for watering plants.
- We can avoid using a hose pipe for watering plants as a lot of water is wasted through it.
- We use water for taking shower.
- Instead of shower, we can take bath using a bucket and mug.
- We use fuels in vehicles.
- We can use public transport or carpool to save fuel.
- We use electricity and coal is used to generate electricity.
- We can use stairs (at least up to 3 floors ) to climb instead of taking lift.
- We use electricity to run fans and lights. We should switch off fans and lights in unoccupied rooms.
Question 8.
List four activities that are possible due to the presence of air.
Answer:
Activities that are possible due to the presence of air:
- Breathing
- Flying kites
- Inflating tyres and balloons
- Drying clothes
Question 9.
How can you contribute towards enhancing the green cover of your locality? Make a list of actions to be taken.
Answer:
- I can contribute towards enhancing the green cover of my locality by adopting following practices:
- I can plant more and more trees and help clean up parks, playgrounds, and other green areas by picking up litter.
- I can take care of the plants and trees growing in or around my locality.
- I can encourage the people in my locality to plant more trees by informing them about the importance of growing 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 or Sun’s energy
(ii) Benefit: Solar energy does not cause pollution.
Drawback: This energy is not available during rainy or cloudy weather.
Question 11.
Cutting down trees on a large scale impacts the quality of the soil. Why do you think it is so?
Answer:
Yes, large scale cutting of trees causes soil erosion. The roots of trees help to hold the soil. When trees are cut down, the roots are no longer holding the soil together and physical factors such as wind and water can easily displace the soil. Besides this, the leaves that fall from the trees decay and enrich the soil with nutrients. These nutrients are used by the plants and trees growing there.
Question 12.
Explain two ways in which human activities pollute the air. Propose one action which can help in reducing air pollution.
Answer:
We use automobiles to travel and fossil fuels are used as a source of energy. Burning of fossil fuels in automobiles releases harmful smoke and gases which cause air pollution. Another cause of air pollution is burning of leaves, trash, and other materials. On burning, these materials also release harmful gases in the air and cause air pollution. Carpooling and public transit are excellent ways to reduce air pollution. No-fuel options like walking and biking are also good options to reduce air pollution.
Question 13.
A family uses solarpanels to generate electricity, a gas stove to cook food and a windmill for pumping waterfrom a well. What would happen if there were no sunlight for a week?
Answer:
This family uses solar energy to generate electricity. If there were no sunlight for a week, electricity generation will stop.
Question 14.
Fill up the blanks using the following terms— (fossil fuels, forest, air, petroleum, coal, water and non-renewable resource)
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 justified? Discuss and prepare a brief report.
Answer:
No, it is wrong to cut the trees for self-need and to meet the increasing demands of human populations.
Reasons for the same are given below:
- Forests are a natural home for many wild animals, including birds and insects. Forests provide food and shelter to them.
- Trees provide us with fresh oxygen for breathing.
- Trees control soil erosion.
- Trees also protect us from various natural calamities like drought, flood, etc.
- Trees provide us with food which is the basic need of humans.
- We should try to plant more and more trees to keep our ecological balance.
Question 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?
Answer:
Water is an important natural resource. We should always try to conserve it. We can take following actions to conserve water in our school:
- We should fill our drinking water cup half. If required, we can take more.
- We should close taps properly after use.
- We can reduce the wastage of water by not flushing the toilet unnecessarily.
- Water used for washing hands can be reused for watering plants.
- We can get the leaky taps and pipes fixed.
- We can set up roof-top rainwater harvesting in the school.