NCERT Class VI Science Solutions: Chapter 14-Water Part 1

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Question 1:

Fill up the blanks in the following:

  1. The process of changing of water into its vapour is called _________________.

  2. The process of changing water vapour into water is called _________________.

  3. No rainfall for a year or more may lead to _________________ in that region.

  4. Excessive rains may cause _________________.

Answer:

The process of changing of water into its vapour is called evaporation.

As showin in images is a result for evaporation in the water cycle

Evaporation in the Water Cycle

As showin in images is a result for evaporation in the water cycle

The process of changing water vapour into water is called condensation.

As showin in images is a result for condensation water cycle

Condensation Water Cycle

As showin in images is a result for condensation water cycle

No rainfall for a year or more may lead to drought in that region.

As showin in images is a result for drought

Result for Drought

As showin in images is a result for drought

Excessive rains may cause flood.

As showin in images is a result for flood

Result for Flood

As showin in images is a result for flood

Question 2:

State for each of the following whether it is due to evaporation or condensation:

  1. Water drops appear on the outer surface of a glass containing cold water.

  2. Steam rising from wet clothes while they are ironed.

  3. Fog appearing on a cold winter morning.

  4. Blackboard dries up after wiping it.

  5. Steam rising from a hot girdle when water is sprinkled on it.

Answer:

  1. Water drops appear on the outer surface of a glass containing cold water. Condensation.

  2. Steam rising from wet clothes while they are ironed. Evaporation

  3. Fog appearing on a cold winter morning. Condensation

  4. Blackboard dries up after wiping it. Evaporation

  5. Steam rising from a hot girdle when water is sprinkled on it. Evaporation

Question 3:

Which of the following statements are “true”?

  1. Water vapour is present in air only during the monsoon. ( )

  2. Water evaporates into air from oceans, rivers and lakes but not from the soil. ( )

  3. The process of water changing into its vapour, is called evaporation. ( )

  4. The evaporation of water takes place only in sunlight. ( )

  5. Water vapour condenses to form tiny droplets of water in the upper layers of air where it is cooler. ( )

Answer:

  1. Water vapour is present in air only during the monsoon. (False)

  2. Water evaporates into air from oceans, rivers and lakes but not from the soil. (False)

  3. The process of water changing into its vapour, is called evaporation. (True)

  4. The evaporation of water takes place only in sunlight. (False)

  5. Water vapour condenses to form tiny droplets of water in the upper layers of air where it is cooler. (True)