Natural Resources - A 1. Observe. Observe the picture alongside and answer the questions. 1. Where do we see the birds? 2. Where is the cow grazing? 3. Locate the trees and the road. from?
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Natural Resources – Air, Water And Land Solutions :
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Class 6 chapter 1 textbook solutions
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Important points :
The elements available in nature which fulfil the basic needs of living things are called natural resources.
Air, water and land are important natural resources.
Soil has both biotic and abiotic constituents.
There are many constituents of air such as nitrogen, oxygen, carbon dioxide, inert gases, water vapour and dust particles.
The ozone layer is a protective shell of the earth.
Natural resources should be used carefully and sparingly
1. Fill in the blank
a) The layer of ozone gas absorbs ultraviolet rays that come from the sun to the earth.
b) Of the total water available on the earth, fresh water forms 0.3 percent.
c) Both biotic and abiotic constituents
are present in the soil.
2. Why is it said that – ?
a) The ozone layer is a protective shell of the earth.
Answer : Because ozone layer absorbs the harmful ultraviolet rays that come from sun to the earth.
b) Water is life.
Answer : Because without water we can not function properly, our metabolism is dependent on water, we can not survive without water
c) Seawater is useful even though it is not potable.
Answer : because Seawater supports vast quantity of marine life that serves as food for us. The plant life of sea, commonly known as phytoplankton, recycles oxygen for you and I to breathe. Seawater also moderates our climate.
3. What will happen if –
a) Microbes in the soil get destroyed.
Answer : If all the microbes in the soil get destroyed, then all the soil respiration and soil nutrient cycling will be stopped. The soil loses its nutrients and hence the plants will not get any nutrient from the soil. And there will be no plants on Earth as they will not get any nutrients and hence Earth will be destroyed
b) The number of vehicles and factories in your surroundings increases.
Answer : The increase in the number of vehicles and factories in surroundings will give rise to employment for many people. But at the same time, they will pose a threat to the entire environment. There will be more emission of carbon dioxide and other harmful gases that will lead towards heart and lung issues.
c) The total supply of potable water is finished.
Answer : If the potable water will finish then Non-potable water can be made potable through reverse osmosis or steam distillation, among others methods. The only problem is that these methods are generally expensive and energy intensive, so energy prices (not to mention water prices) would inevitably soar.
4. Match the following.
Group ‘A’ Group ‘B’
1) Carbon a) Generation of dioxide soil
2) Oxygen b) Rain
3) Water c) Plants and vapour food. production
4) Microbes d) Combustion
Answer : 1-c. 2-d. 3-b. 4-a
Explanation: