Water Resources - 2 Class 4 Worksheet SST

Q1: Fill in the Blanks.

(i) Water covers about __________% of the Earth's surface.

(ii) The process of water turning into vapor is called __________.

(iii) The largest source of freshwater on Earth is __________.

(iv) __________ is the natural cycle of water movement between the Earth's surface and the atmosphere.

(v) __________ is the term for water that falls from the atmosphere to the ground in the form of rain, snow, sleet, or hail.

(vi) A large body of water surrounded by land is called a __________.

(vii) __________ is the process of removing salt and other impurities from seawater to make it suitable for drinking and irrigation.

(viii) The three states of water are liquid, __________, and gas.

(ix) __________ is a human-made water storage area usually formed by building a dam across a river.

(x) The underground layer of rock or sediment that holds water is called an __________.

Q2: Multiple Choice Questions (MCQs).

(i) What percentage of Earth's water is freshwater?
(a) 25%
(b) 50%
(c) 75%
(d) 90%

(ii) Which of the following is a natural source of freshwater?
(a) Ocean
(b) Lake
(c) Saltwater river
(d) Saltwater well

(iii) What is the main purpose of a dam?
(a) Generating electricity
(b) Providing a place for fishing
(c) Creating a waterfall
(d) Stopping erosion

(iv) Which of the following is a water conservation method?
(a) Running the tap while brushing teeth
(b) Fixing leaky faucets
(c) Watering plants during the hottest part of the day
(d) Using a hose for car washing

(v) Where do underground water reserves called aquifers store water?
(a) In clouds
(b) In lakes
(c) In rivers
(d) In porous rock layers

Q3: True or False.

(i) Water cycle is a continuous process of water movement on Earth.

(ii) All the water on Earth is drinkable without any treatment.

(iii) Desalination is the process of making freshwater salty.

(iv) Lakes and rivers are examples of surface water.

(v) Precipitation includes water falling in the form of dew.

Q4: Match the Following.

Q5: Short Answer Questions.

(i) Explain the water cycle in your own words.

(ii) Why is it important to conserve water? Give two reasons.

(iii) Describe the process of desalination.

(iv) How do dams benefit society and the environment?

(v) Name and describe two sources of surface water.

You can find Worksheets Solutions here: Worksheet Solutions: Water Resources - 2