Q.1. Consider the following statements :
1. Dust particles are generally concentrated in the lower layers of the atmosphere; yet, convectional air currents may transport them to great heights.
2. The higher concentration of dust particles is found in subtropical and polar regions due to dry winds in comparison to equatorial and temperate regions.
3. Dust and salt particles act as hydrophobic nuclei around which water vapour condenses to produce clouds.
1. Dust particles are generally concentrated in the lower layers of the atmosphere; yet, convectional air currents may transport them to great heights.
2. The higher concentration of dust particles is found in subtropical and polar regions due to dry winds in comparison to equatorial and temperate regions.
3. Dust and salt particles act as hydrophobic nuclei around which water vapour condenses to produce clouds.
How many of the statements given above is/are correct ?
Anonymous Quiz
8%
A. Only one
54%
B. Only two
38%
C. Only Three
0%
D. None
Q.2.Which of the following represents the correct descending order of the top four most abundant gases in Earth's atmosphere by percentage composition ?
A. Nitrogen > Oxygen Argon > Carbon Dioxide
B. Oxygen Nitrogen Argon > Carbon Dioxide
C. Nitrogen Carbon Dioxide Oxygen > Argon
D. Oxygen Carbon Dioxide > Nitrogen > Argon
A. Nitrogen > Oxygen Argon > Carbon Dioxide
B. Oxygen Nitrogen Argon > Carbon Dioxide
C. Nitrogen Carbon Dioxide Oxygen > Argon
D. Oxygen Carbon Dioxide > Nitrogen > Argon
Q.3.With reference to the layers of the atmosphere, consider the following statements :
1. The thickness of the troposphere is greatest at the equator because heat is transported to great heights by strong convectional currents.
2. The air temperature at the tropopause is about -80°C over the poles and about -45°C over the equator.
3. In the mesosphere, temperature starts decreasing with the increase in altitude and reaches up to -100°C at a height of 80 km.
4. Radio waves transmitted from the Earth are reflected back to the Earth by the ionosphere.
1. The thickness of the troposphere is greatest at the equator because heat is transported to great heights by strong convectional currents.
2. The air temperature at the tropopause is about -80°C over the poles and about -45°C over the equator.
3. In the mesosphere, temperature starts decreasing with the increase in altitude and reaches up to -100°C at a height of 80 km.
4. Radio waves transmitted from the Earth are reflected back to the Earth by the ionosphere.
How many of the above statements are correct ?
Anonymous Quiz
8%
A. Only one
38%
B. Only two
39%
C. Only three
15%
D. All four