Social Science Question(1 Marks)

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.

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

Carbon dioxide creates the greenhouse effect in the atmosphere.

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

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

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

The standard unit of measuring temperature is degree Celsius.

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

: The temperature at which the air becomes fully saturated is known as dew point.

Blanket of air surrounding the earth is known as the atmosphere.

There is no air on the moon and therefore no air pressure.

Different forms of precipitations are: dew, rainfall, hail, snowfall, fog, sleet.

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

Rain Gauge.

It has tendency to go down.

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

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.

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

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

When the level of carbon dioxide increases in the atmosphere due to factory smoke or car fumes, the heat retained increases the temperature of the earth. This is called global warming.

It is called loo.

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

Exosphere is the topmost layer of the atmosphere.

Nitrogen gas has the maximum proportion in air.

Stratosphere.

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.

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

It protects us from the harmful effect of the sunrays.

Without the greenhouse gas the earth would have been too cold to line in.

Stratosphere.

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.

What is the freezing and boiling point of water in celsius?

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

Mesosphere.

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

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

Insolation is the incoming solar energy intercepted by the earth.

Moisture in the air at any time is called humidity.

Troposphere layer makes weather phenomena possible.

Ionosphere layer makes radio communication possible.

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

This is the third layer of the atmosphere. It lies above the stratosphere. It extends up to the height of 80km. Meteorites burn in this layer on entering from the space.

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

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

Stratosphere contains a layer of ozone gas.

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.