ANSWER THE FOLLOWING QUESTIONS
1.Which two gases make the bulk of the atmosphere?
2.Which gas creates green house effect in the atmosphere?
3.Draw a flow chart showing the various components of environment.
4.What does lithosphere provide us?
5.Mention the basic components of natural environment.
6.How is atmosphere important for us?
7.Distinguish between biotic and abiotic components of environment.
8.How is environment important for us?
Answers
Answer:
1. The two gases that make the bulk of the atmosphere are: Oxygen (21%) & Nitrogen (78%)
2. Greenhouse gases include carbon dioxide, methane, nitrous oxide and other gases that accumulate in the atmosphere and create the heat-reflective layer that keeps the Earth at a livable temperature. These gases form the insulation that keeps the planet warm enough to support life.
4. Lithosphere provide us forests, grasslands for grazing land for agriculture and human settlements. It is a rich source of minerals.
5. The basic components of natural environment are - land, water, air, plants and animals.
6. The atmosphere helps to protect living organisms from genetic damage by solar ultraviolet radiation, solar wind and cosmic rays. The current composition of the Earth's atmosphere is the product of billions of years of biochemical modification of the paleoatmosphere by living organisms.
Question no. 8 is same as Question no. 6
For question no. 7 refer to the attachment.
Answer:
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