INTRODUCTION - Chapter 14 Water class 6 ncert solutions Science - SaraNextGen [2024-2025]

Updated By SaraNextGen

On April 24, 2024, 11:35 AM

Question 1:

Fill in the blanks:

(a) The process of changing water into its vapour state is called _______ __.

(b) The process of changing water vapour into water is called _______ __.

(c) No rainfall for a year or more may lead to _______ __ in the region.

(d) Excessive rains may cause _______ __.

Answer:

(a) The process of changing water into its vapour state is called _evaporation__.

(b) The process of changing water vapour into water is called _condensation__.

(c) No rainfall for a year or more may lead to __drought__ in the region.

(d) Excessive rains may cause __floods__.

Question 2:

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

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

(b) Steam rising from wet clothes while they are ironed.

(c) Fog appearing on a cold winter morning.

(d) Blackboard dries up after wiping it.

(e) Steam rising from a hot girdle when water is sprinkled on it.

Answer:

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

(b) Steam rising from wet clothes while they are ironed. (Evaporation)

(c) Fog appearing on a cold winter morning. (Condensation)

(d) Blackboard dries up after wiping it. (Evaporation)

(e) Steam rising from a hot girdle when water is sprinkled on it. (Evaporation)

Question 3:

Which of the following statements are ‘True’?

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

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

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

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

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

Answer:

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

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

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

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

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