Answer the following questions: 3x3=9
1.Enumerate the life sustaining elements present on the earth?
2.Mention the negative impacts on nature that is caused by the felling of trees?
3.Enumerate three movements of the ocean water.
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1) Living organisms contain relatively large amount of oxygen, carbon, hydrogen and sulfur along with sodium, magnesium, potassium these six elements are known as macrominerals.
2) Large scale tree cutting can lead to deforestation, a transformation of an area from forest to terrain with little vegetation . Plants create oxygen and absorb greenhouse gasses. The destruction of trees may therefore, encourage global warming.
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