Air

Consider the following statements:
1. Carbon dioxide released in the atmosphere creates a green house effect.
2. Without Carbon dioxide the earth would have been too hot to live in.
3. The increased level of Carbon dioxide is caus: ing global warming.
Which of the above mentioned statements is/are correct?

Consider the following statements:
1. Hydrogen and Oxygen are the main gases in the atmosphere.
2. Carbon dioxide, helium, ozone, argon and nitrogen are found in lesser quantities.
Which of the above mentioned statements is/are correct?

The gas needed by plants for thelr survival

Consider the following statements:
1. All the weather phenomena like rainfall, fog and hailstorm occur in stratosphere.
2. Stratosphere also contains a layer of ozone gas.
Which of the above mentioned statements is/are correct?

Consider the following:
Layer of atmosphere: Height
1. Troposphere: 13 km
2. Stratosphere: 50 km
3. Thermosphere: 80 km
4. Mesosphere: 80-400 km
Which of the above are matched correctly?

The radio waves transmitted from the earth are reflected back to the earth by

The most ideal condition for flying aeroplanes is found in

The Meteorites entering earth\’s atmosphere burn up in

Consider the following statements:
1. The uppermost layer of atmosphere is lonosphere.
2. Light gases like helium and hydrogen float into space from exosphere.
Which of the above mentioned statements is/are correct?

Consider the following statements:
1. The standard unit of measuring temperature is degree Celsius.
2. On the Celsius scale the water freezes at 4°C and boils at 100°C.
Which of the above mentioned statements is/are correct?

Consider the following statements:
1. Insolation is the incoming solar energy in- tercepted by the earth.
2. The amount of insolation increases from the equator towards the poles.
Which of the above mentioned statements is/are correct?

Consider the following statements:
1. Astronauts have to wear special protective space suits on moon to overcome high air pressure.
2. The air on moon\’s surface is denser than on the earth.
Which of the above mentioned statements is/are correct?

Consider the following statements:
1. The air pressure is the highest at sea level and decreases with height.
2. High pressure is assoclated with cloudy skies and wet weather.
3. Horizontally the distribution of air pressure is influenced by temperature of air at
a given place.
Which of the above mentioned statements is/are correct?

Consider the following statements:
1. A wind is named after the direction from which it blows.
2. The movement of air from high pressure area to low pressure areas is called wind.
Which of the above mentioned statements is/are correct?

Consider the following statements:
1. The land and sea breeze are examples of permanent winds.
2. The trade winds blow only during a particular period of the day or year in a small area.
Which of the above mentioned statements is/are correct?