Water Class 2 Worksheet Science

Q1: Multiple Choice Questions (MCQs)

(i) How much of the Earth's surface is covered with water?
(a) One-third
(b) One-fourth
(c) Two-fourths
(d) Three-fourths
Ans: (d) 

(ii) What is the main source of freshwater on Earth?
(a) Rivers
(b) Groundwater
(c) Oceans
(d) Rain
Ans: (b) 

(iii)  Which of these is not a source of drinking water?
(a) River
(b) Well
(c) Polluted water
(d) Rainwater
Ans: (c)

(iv) Where are large dams built?
(a) In oceans
(b) On rivers
(c) On lakes
(d) On mountains
Ans: (b)

(v) Which of these cannot be used to grow crops?
(a) Water
(b) Well water
(c) Sea water
(d) Polluted water
Ans: (c)

Q2: Fill in the Blanks

(i) What is the process by which water changes into water vapour naturally called? This process is known as _____________.
Ans: Evaporation.

(ii) Rainwater flows away into nearby ponds, lakes, and rivers. Some rainwater percolates into the ground, reaching groundwater reservoirs and ___________.
Ans: Wells.

(iii) Rainwater harvesting is a process of collecting and storing rainwater for ____________ use.
Ans: Future.

(iv) ___________ is a valuable source of freshwater on Earth, and its level is known as the water table.
Ans: Groundwater.

(v) Droughts occur when a region does not receive __________ rainfall for successive years.
Ans: Adequate.

Q3: True/False

(i) The Earth is called the Blue Planet because half of its surface is covered with water.
Ans: False
The Earth is called the Blue Planet because three-fourths of its surface is covered with water.

(ii) Hydroelectric power plants generate electricity using wind energy.
Ans: False
Hydroelectric power plants use the force of flowing water, not wind energy, to generate electricity.

(iii) Check dams are built to accelerate the flow of rainwater in natural streams.
Ans: False
Check dams are built to impede the flow of rainwater in natural streams.

(iv) Groundwater is a source of clean drinking water found only in deep wells.
Ans: False
Groundwater can be obtained from shallow wells or deep tube wells.

(v) Rainwater harvesting is a process used to collect and store rainwater for current use only.
Ans: False
Rainwater harvesting is done to collect and store rainwater for future use as well.