Homework Practice

Printable assignment

Water: A Precious Resource: Practice 001

Core Ideas

Question 1mcq

Why is freshwater considered limited even though most of Earth is covered with water?

A.Most Earth water is salty or locked in ice and not easily usable.

B.All water on Earth is equally drinkable.

C.Freshwater is made only in factories.

D.There is no water in oceans.

Question 2mcq

Which source is generally not directly suitable for drinking without removing salts?

A.Rainwater collected cleanly

B.Sea water

C.Groundwater from a safe well

D.Treated tap water

Question 3mcq

A student says, “Water cannot become scarce because oceans are huge.” What is the best reply?

A.Ocean water is already underground.

B.Oceans contain no water.

C.Ocean water is salty and not easily available for most daily freshwater needs.

D.Scarcity happens only because people do not like water.

Question 4mcq

Which pie chart conclusion is scientifically correct if a tiny slice represents usable freshwater?

A.Most water is available as tap water.

B.Freshwater is more than salt water.

C.All groundwater is polluted.

D.Usable freshwater is a small fraction of total water.

Question 5mcq

Why must cities plan water use carefully?

A.Demand can exceed available usable freshwater.

B.Water cannot flow through pipes.

C.Rain never becomes groundwater.

D.Plants do not need water.

Try These Situations

Question 6mcq

Which process returns water vapour to liquid droplets in clouds?

A.Infiltration

B.Condensation

C.Combustion

D.Fertilisation

Question 7mcq

How does rain help recharge groundwater?

A.Rainwater changes into petrol underground.

B.Rainwater cannot enter soil.

C.Some rainwater seeps into soil and fills underground spaces.

D.Rainwater only forms clouds again immediately.

Question 8mcq

A paved parking lot is built over open ground. How may this affect groundwater recharge?

A.It will increase all groundwater instantly.

B.It will stop evaporation from oceans.

C.It will make clouds disappear.

D.It may reduce seepage of rainwater into the ground.

Question 9mcq

Which sequence is part of the water cycle?

A.Evaporation

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condensation

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precipitation

B.Rusting

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melting

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burning

C.Pollination

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fertilisation

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germination

D.Conduction

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magnetism

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sewage

Question 10mcq

Why is a recharge pit often filled with gravel and sand?

A.To stop all water from entering soil.

B.To let rainwater filter and seep into the ground.

C.To make water evaporate faster only.

D.To produce electricity from stones.