Around 97% of water available on earth is________ water

(a)

fresh

(b)

pure

(c)

salty

(d)

polluted

Which of the following is not a part of water cycle?

(a)

evaporation

(b)

condensation

(c)

rain

(d)

distillation

Which of the following processes add water vapour to the atmosphere?
i. Transpiration
ii. Precipitation
iii. Condensation
iv. Evaporation

(a)

ii and iii

(b)

ii and iv

(c)

i and iv

(d)

i and ii

About 30% of the fresh water is found in?

(a)

glaciers

(b)

ground water

(c)

other sources of water

(d)

0.3%

Using R.O. (Reverse Osmosis) plant at home eliminates lot of non-potable water. The best way to effectively use the expelled water of R.O. plant is________.

(a)

make the expelled water go and seep near the bore well

(b)

use it for watering plants

(c)

to drink the expelled water after boiling and cooling

(d)

to use for cooking as the water is full of many nutrients

Name the places where water is found as ice.

What are the types of rain water harvesting?

Give reason for the following statement – Sewage should not be disposed of in rivers or oceans before treatment.

The fresh water available on earth is only 3%. We cannot increase the amount of water. In that case, how can sustain the water level?

What is potable water? List down its characteristics.

a. Identify the districts that get only low annual rainfall in Tamilnadu.
b. Identify the districts that get a medium annual rainfall in Tamilnadu.
c. State the districts that enjoy high annual rainfall in Tamilnadu