(i) what is atmosphere? (ii) which two gases make a bull if the atmosphere? (iii) what is weather? (iv) what is air pressure?
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- i) Atmosphere is a blanket of air surrounding the Earth's surface. Atmosphere contains oxygen which is essential for animals to breathe and get energy from food
- ii) Nitrogen and oxygen are the two major constituents of the atmosphere gases.
- iii)state of the atmosphere at a particular place during a short period of time. It involves such atmospheric phenomena as temperature, humidity, precipitation (type and amount), air pressure, wind, and cloud cover.
- iv) It is the pressure exerted on Earth's surface due to the weight of the overlying air molecules.
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