Q.4 Explain the terms in one to two sentences-
a. Atmosphere
b. Troposphere
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a) The atmosphere is the blanket of gases which surrounds Earth. It is held near the surface of the planet by Earth's gravitational attraction. Without the atmosphere there could be no life on Earth.
b) The troposphere is the lowest layer of Earth's atmosphere, and is also where nearly all weather conditions take place. It contains 75% of the atmosphere's mass and 99% of the total mass of water vapour and aerosols.
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ATMOSPHERE
The mixture of gases that surrounds the earth or any other star, planet, etc.
TROPOSPHERE
The lowest layer of the earth’s atmosphere, between the surface of the earth and about 6 to 10 kilometres above the surface
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