i. Troposphere layer is the most important layer of the atmosphere.
ii. As we go up the layers of atmosphere, the pressure falls rapidly.
iii. The trade winds, westerlies and easterlies are the permanent winds.
iv. Cold air is denser and heavy.
v. The air pressure is highest at sea level and decreases with height.
vi. The upper most layer of the atmosphere is known as exosphere.
i. When air is heated, it expands, becomes lighter and goes up. True
ii. High pressure is associated with clear and sunny skies. False
iii. All living beings on this earth depend on the atmosphere for their survival. True
iv. Carbon dioxide is the most plentiful gas in the air. False
v. Green plants produce oxygen during photosynthesis. True
vi. The air pressure is highest at sea level and decreased with height. True
Ans. Our earth is surrounded by a huge blanket of air called atmosphere.
Ans. Rain Gauge
Ans. Wind Vane shows the direction of the wind.
Ans. The standard unit of measuring temperature is degree Celsius.
Ans. It was invented by Anders Celsius.
Ans. On the Celsius scale the water freezes at 0°C and boils at 100°C.
Ans. Weather is hour-to-hour or day to day condition of the atmosphere.
Ans. Ozone protects us from the harmful effect of the sun rays.
Ans. Stratosphere layer is almost free from Clouds.
Ans. Precipitation that comes down to the earth in liquid form is called rain.
Ans. The hot and dry local wind of northern plane of India is called loo.
Ans. Green plants use carbon dioxide to make their food and release oxygen.
Ans. Ozone layer protects us from the harmful effect of the sun rays.
Ans. The degree of hotness and coldness of the air is known as temperature.
Ans. Insolation is the incoming solar energy intercepted by the earth.
Ans. On the moon there is no air and hence no air pressure.
Ans. Moisture in the air at any time is known as humidity.
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