Water

 

 Rainbow 🌈 Mental Exercise, daily activity 

1. Which of the following is a source of freshwater?

 A) Ground water
 B) Rainwater
 C) Surface run off water 
 D) All of above 

ANSWER= (D) All of above
Explain:- Fresh water is the water naturally available on earth's surface. 

 

2.  % of total drinking water available on earth is:

 A) 4.4
 B) 5.6
 C) 6.5 
 D) 0.3

ANSWER= (D) 0.3
Explain:- Only one third of water on the earth is suitable for drinking. 

 

3.Which of the following sources cannot be used for drinking purposes?

 A) sea water
 B) river water
 C) rain water
 D) lake water

ANSWER= (A) sea water
Explain:- sea water contains salt. Too much of salt is not good for health 

 

4. Condensation process is the opposite of ____.

 A) Evaporation 
 B) Transpiration 
 C) Sublimation 
 D) Freezing 

ANSWER= (A) Evaporation 
Explain:-Condensation is the process of conversion of water vapour into liquid, and evaporation is the process of conversion of liquid into water vapour. Thus, evaporation and condensation are opposite of each other.

 

5. The very first step of the water cycle is:

 A) Freezing 
 B) Evaporation 
 C) Condensation 
 D) Transpiration 

ANSWER= (B) Evorportion 
Explain:-  Evaporation is the process by which the surface of a liquid changes to a gas. Liquid water (in the ocean, lakes, or rivers) evaporates and turns into water vapour during the water cycle.

 

6. The process of collecting rainwater is called ____.

 A) Rainwater collecting
 B) Rainwater replenishing 
 C) Rainwater harvesting 
 D) Rainwater discharging 

ANSWER= (C) Rainwater harvesting. 
Explain:- Rainwater harvesting is the activity of directly collecting rainwater and storing it in big tanks for later use or of making rainwater percolate into the ground more efficiently to recharge groundwater.

 

7. Water exists in ____ forms.

 A) 4
 B) 1
 C) 2
 D) 3

ANSWER= (D) 3
Explain:-  Ice as  solid , water as liquid and steam as gas

Here's a video representation: