Social Science Question(1 Marks)

The amount of insulation decreases from the equator towards the poles. Therefore, the temperature decreases in the same manner. That’s why poles are covered with snow.

Barometre.

Nitrogen and oxygen are two gases which make up the bulk of the atmosphere.

It was invented by Anders Celsius.

The average weather condition of a place for a longer period of time represents the climate of a place.

Moving air is called wind. Wind always blows from high pressure to low pressure.

The movement of air from high pressure area to low pressure areas is called wind.

Carbon dioxide gas absorbs and trap heat in the air.

When water evaporates from land and different water bodies, it becomes water vapour.

Wet clothes take longer time to dry on a humid day because the air has a plenty of water vapor already present in it and is not able to accommodate more water vapor.

Ionosphere.

When hot air rises from surrounding area rushes there to fill in the gap. That is how air circulation takes place.

Wind Vane shows the direction of the wind.

Stratosphere.

Green plants use carbon dioxide to make their food and release oxygen.

The hot and dry local wind of northern planes of India is called loo.

When air is heated, it expands, becomes lighter and goes up. Cold air is denser and heavy. That is why it tends to sink down.

The pressure exerted by the weight of air on the surface of the earth is called air pressure.

Carbon dioxide released in the atmosphere creates a greenhouse effect in the atmosphere.

It has tendency to go down.

The earth is surrounded by a huge blanket of air called atmosphere.

Mesosphere.

Exosphere is the topmost layer of the atmosphere.

A wind is named after the direction from which it blows, e.g. the wind blowing from the west is called westerly.

Nitrogen gas has the maximum proportion in air.

Stratosphere.

When air is heated, it expands, becomes lighter and goes up.

The degree of hotness and coldness of the air is known as temperature.

The hot and dry local wind of northern plane of India is called loo.

Precipitation that comes down to the earth in liquid form is called rain.

Ozone layer protects us from the harmful effect of the sun rays.

The total percentage of oxygen in the air is nearly 21%.

Air pressure is highest at the sea level.

When trees on hill sides are cut, rainwater flows down the bare mountains and can cause flooding of low lying areas.

Ozone protects us from the harmful effect of the sun rays.

Air moves from high pressure areas to low pressure areas.

Carbon dioxide released in the atmosphere creates a greenhouse effect by trapping the heat radiated from the earth.

Winds can be broadly divided into three types: Permanent winds, Seasonal winds and Local winds.

Three components of cyclone are wind velocity, rain and tidal surge.

Moisture in the air at any time is called humidity.

The standard unit of measuring temperature is degree Celsius.

Carbon dioxide creates greenhouse effect by trapping the heat radiated from the earth.

Insolation is the incoming solar energy intercepted by the earth.

It is called loo.

Troposphere layer makes weather phenomena possible.

Weather is hour-to-hour, day-to-day condition of the atmosphere. On the other hand, the average weather condition of a place for a longer period of time represents the climate of a place.

A wind is named after the direction from which it blows.

It protects us from the harmful effect of the sunrays.

Ionosphere layer makes radio communication possible.

Carbon dioxide creates the greenhouse effect in the atmosphere.