On the planet Earth, most of the freshwater exists as ice caps and glaciers. Out of the remaining freshwater, the largest proportion:

The annual range of temperature in the interior of the continents is high as compared to coastal areas. What is/are the reason/reasons?

1. Thermal difference between land and water.

2. Variation in altitude between continents and oceans.

3. Presence of strong winds in the interior.

4. Heavy rains in the interior as compared to coasts.

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'Climate is extreme, rainfall is scanty and the people used to be nomadic herders.' The above statement best describes which of the following regions?

Which of the following is/are unique characteristic/characteristics of equatorial forests?

1. Presence of tall, closely set trees with crowns forming a continuous canopy.

2. Co-existence of large number of species.

3. Presence of numerous varieties of epiphytes.

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During a thunderstorm, the thunder in the sky is produced by the:

1. Meeting of cumulonimbus clouds in the sky,

2. Lightning that separates the nimbus clouds.

3. Violent upward movement of air and water particles.

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Which of the following phenomena might have influenced the evolution of organisms?

1. Continental drift

2. Glacial cycles

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