Question

Write True or False and correct the sentences if False :-

1) Oxygen is the most abundant gas as it forms 78% of the total volume of the atmosphere.

2) Increase in the level of carbon dioxide causes pollution.

3) 70 percent of the Earth's total is land.

4) Forests cause Global warming.

5) Plants produce Carbon dioxide and absorb oxygen.

6) Deforestation causes floods.

7) Planting trees helps to conserve natural environment.

8) Water is a biotic element of Physical environment.​

Answer 1

Answer:

1. false because nitrogen forms 78%
2. true.
3. false.
4. true.
5. false.
6. true.
7. true.
8. true.

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Answer 2

1. false because there is only 21% of oxygen.

2. false because only greenhouse gasses pollute.

3. true because the rest 30% includes water

4. false because not forest but pollution causes global warming.

5. true because of the process of photosynthesis plants take co2 and give o2.

6. true. because trees hold many gallons of water, if there are no trees floods occur.

7. true. because they play a crucial role in environment.

8. false. because it is abiotic element. all living organisms are considered as biotic.

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