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The Water Cycle 2

Students will answer questions about the water cycle in more detail using their understanding of changes of state.

'The Water Cycle 2' worksheet

Key stage:  KS 2

Curriculum topic:  States of Matter

Curriculum subtopic:  Water Cycle: Evaporation and Condensation

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10


As water moves through the water cycle, it may exist as a solid. liquid or gas. There is water vapour in the air around us, even though we cannot see it until it condenses into water droplets.

Wind and heat cause the droplets to rise up into the air. As the droplets rise, the temperature falls, and the droplets form clouds.

 


When the air is very cold, the water droplets freeze, and fall as snow. Sometimes, high up on mountains, the snow does not melt because the temperature does not rise above freezing all year round.

However, in other places, melting ice flows down the mountain to create rivers which then flow to the sea.

Match up these changes of state with the correct stage in the water cycle.

Column A

Column B

melting
water droplets form clouds
condensing
ice changes to water
freezing
water changes into vapour
evaporating
snowflakes form

Which TWO of these weather conditions increase the rate of evaporation?

hailstones

strong breeze

sunshine

fog

When evaporation occurs over the seas and oceans, which dissolved material is left behind? 

seaweed

sugar

salt

sand

Why is sea water salty? TWO of these explanations are correct...

a giant poured it in

it is washed off the land

dissolved from rocks

aliens dumped it

Which reversible process separates a mixture of salt and water?

evaporation

evolution

condensing

contracting

How does the temperature change as we travel up into the atmosphere? 

it gets warmer

it does not change

it gets cooler

Rain, sleet, snow and hailstones are collectively called... 

prediction

perspiration

precipitation

The rainwater which gathers in streams and rivers eventually flows where? 

to the sea

up the hills

into the clouds

Which one of these forces acts on the falling rain and water to carry it from high ground to the lowest level (sea level)? 

magnetism

gravity

friction

Many scientist are worried about global warming.


They predict that the temperature of the Earth will rise. If this happens, what might happen to the ice at the North and South Poles? 

sink

freeze

melt

  • Question 1

Match up these changes of state with the correct stage in the water cycle.

CORRECT ANSWER

Column A

Column B

melting
ice changes to water
condensing
water droplets form clouds
freezing
snowflakes form
evaporating
water changes into vapour
  • Question 2

Which TWO of these weather conditions increase the rate of evaporation?

CORRECT ANSWER
strong breeze
sunshine
EDDIE SAYS
Think hair dryer! A strong stream of warm air!
  • Question 3

When evaporation occurs over the seas and oceans, which dissolved material is left behind? 

CORRECT ANSWER
salt
EDDIE SAYS
Seaweed and sand are not dissolved in sea water, we can see them clearly. Sea water contains lots of different salts, not just the salt you put on your fish and chips!
  • Question 4

Why is sea water salty? TWO of these explanations are correct...

CORRECT ANSWER
it is washed off the land
dissolved from rocks
EDDIE SAYS
Over millions of years of the water cycle, salts have been washed off the land into the seas. As the water evaporates, the salts are left behind.
  • Question 5

Which reversible process separates a mixture of salt and water?

CORRECT ANSWER
evaporation
EDDIE SAYS
You can try this for yourself! Make a salty solution and leave it in an open container in a warm, dry place. Check it after a few days!
  • Question 6

How does the temperature change as we travel up into the atmosphere? 

CORRECT ANSWER
it gets cooler
EDDIE SAYS
The cooling water vapour condenses into clouds as the temperature falls.
  • Question 7

Rain, sleet, snow and hailstones are collectively called... 

CORRECT ANSWER
precipitation
  • Question 8

The rainwater which gathers in streams and rivers eventually flows where? 

CORRECT ANSWER
to the sea
  • Question 9

Which one of these forces acts on the falling rain and water to carry it from high ground to the lowest level (sea level)? 

CORRECT ANSWER
gravity
  • Question 10

Many scientist are worried about global warming.


They predict that the temperature of the Earth will rise. If this happens, what might happen to the ice at the North and South Poles? 

CORRECT ANSWER
melt
EDDIE SAYS
If the ice at the poles melts, there will be more water in the oceans!
---- OR ----

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