Clouds
Building Background Clouds
Building Background Visualizing
What are the sentences about? Circle the answer.
Read the sentences and draw what happens last.
Water Cycle
(1) The sun warms water and air. The water evaporates, or
changes into water vapour.
(2) The warm air rises and meets colder air. The water vapour
condenses, or changes into tiny water drops or ice crystals.
The drops and crystals form clouds.
(3) The water drops and
ice crystals join together.
They float in the sky.
Their different shapes and sizes
are always changing.
We can look at them to find out about
different kinds of weather.
① rain
② puddles
③ clouds
④ forests
Which is true about clouds? Circle the correct answer.
2
1.
① Clouds float in the sky.
② Clouds run on the ground.
2.
① Their shapes and sizes are always the same.
② Their shapes and sizes are always changing.
Four Corners Workbook
(4) When they become too heavy they fall
to Earth as rain, sleet, hail or snow.
Clouds
3
Building Vocabulary High-Frequency Words part, different, kind, of
Building Vocabulary Key Words
Read the sentences and draw a picture correctly.
Fill in the blanks with the correct words from the Word Bank.
[ Word Bank ]
water
air
clouds
drop
heavy
There are different kinds of leaves.
rain
snow
vapour
Leaves have different shapes and sizes.
Some leaves are large. And some leaves are small.
The sun warms
water and air
They also form in different parts of the forest.
.
The water evaporates, or changes into
water
vapour
.
The warm air rises and meets colder air.
The water vapour condenses, or changes into
tiny water
drops
.
clouds ,
When they become too heavy they fall
to Earth as rain , sleet, or snow .
The water drops form
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Four Corners Workbook
Clouds
5
Comprehension Comprehension Check
How are clouds made? Look at the pictures and write the numbers of
them in the order of how clouds are made.
1.
2.
3
(
)→(
2
Comprehension Comprehension Check
Look at the picture and mark( ) on Yes or No.
3.
)→(
1
)
Read the sentences and number them in order.
1. The warm air rises and meets colder air. The water vapour
condenses, or changes into tiny water drops or ice crystals.
Cirrus clouds are white and feathery.
Yes
No
Sometimes these clouds are called pigs’ tails.
Yes
No
Cirrus clouds may form on a rainy day.
Yes
No
These clouds are made of ice crystals.
Yes
No
Circle the answer.
2. The water drops and ice crystals join together.
3. The sun warms water and air. The water evaporates, or changes
into water vapour.
(
3
)→(
1
)→(
2
)
1. What are cirrus clouds sometimes called?
① pigs’ tails
③ dukes’ feathers
2. When do cirrus clouds form in the sky?
① on a rainy day
③ on a fine day
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Four Corners Workbook
② mares’ tails
④ ice crystals
② on a windy day
④ on a snowy day
Clouds
7
Comprehension Comprehension Check
Look at the picture and read the sentences. Then circle the sentence
which might come next.
Comprehension Comprehension Check
What are the sentences below about? Circle the correct answer.
1.
Cumulus clouds look like puffy cotton balls.
They often form low in the sky.
They are like damp sheets.
They hang low and often cover the whole sky.
If you see them, rain or snow may be on the way.
① stratus clouds
① Sometimes they seem to make pictures in the sky.
② Sometimes these clouds are called mares’ tails.
② cirrus clouds
③ cumulus clouds
Write the words from the Word Bank.
[ Word Bank ]
2.
white and feathery
low
damp sheets
1. What do cirrus clouds look like?
When cumulus clouds become large and dark,
they turn into nimbus storm clouds.
① This means that the sun may be on its way.
② This means that rain may be on its way.
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Four Corners Workbook
2. Where do cumulus clouds hang in the sky?
3. If you see stratus clouds, what can you
expect?
snow
rain
high
white and feathery
low
rain or snow
Clouds
9
Comprehension Comprehension Check
Comprehension Comprehension Check
Look at the pictures and answer the questions.
Cirrus Clouds
Cumulus Clouds
Mark( ) on True or False.
Stratus Clouds
1. When water drops and ice crystals in the sky
become too heavy, they fall to Earth as rain or
snow.
True
False
2. Cirrus clouds are made of ice crystals.
True
False
3. Cumulus clouds often form high in the sky.
True
False
4. When cumulus clouds become large and dark,
they turn into nimbus storm clouds.
True
False
5. Stratus clouds hang low and often cover the
whole sky.
True
False
1. Which one is true about cirrus clouds?
① These clouds are made of ice crystals.
② Sometimes these clouds change into nimbus storm clouds.
Write about how clouds are made in three sentences.
2. What do cumulus clouds look like?
① mares’ tails
③ sands
② puffy cotton balls
④ ice crystals
3. What might you see soon if you see stratus clouds in the sky?
① fallen leavers
③ snow or rain
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Four Corners Workbook
② hail
④ water vapour
Clouds
11
Building Sentence Structure Describing Words and Action Verbs
Look at the pictures and circle all the describing words in the
sentences.
Writing What Can You See on a Snowy Day?
Look at the picture. What clouds may you see? How are those clouds
made? Write a paragraph about it.
1. Cirrus clouds are white and feathery.
2. Cirrus clouds may form on a fine day.
3. Cumulus clouds look like puffy cotton balls.
It is a snowy day.
Circle all the action verbs in the sentences.
1. Cirrus clouds form high in the sky where it is very cold.
2. When cumulus clouds become large and dark, they turn into
nimbus storm clouds.
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Four Corners Workbook
Clouds
13
Listening Practice
MEMO
Listen to the sentence and fill in the blanks.
cycle
1. Clouds are part of the water __________.
heavy they fall to Earth as rain, sleet, hail or __________.
snow
2. When they become too __________
Cirrus clouds form high in the sky where it is very __________.
cold
3. __________
cotton __________.
balls
4. Cumulus clouds look like puffy __________
snow may be _________
on _________
the _________.
way
5. If you see stratus clouds, rain or _________
Listen to the paragraph and fill in the blanks.
float in the sky. Their different __________
shapes and __________
sizes are always
6. Clouds __________
weather
changing. We can look at them to find out about different kinds of __________.
rises and __________
meets colder air. The water __________
vapor
7. The warm air __________
ice
crystals The drops
condenses, or changes into tiny water drops or __________
__________.
form clouds.
and crystals __________
feathery Sometimes these clouds are called
8. Cirrus clouds are white and __________.
mares’ __________.
tails
__________
large and __________,
dark they turn into nimbus
9. When cumulus clouds become __________
storm __________.
clouds This means that __________
rain may be on its way.
__________
damp __________.
sheets They __________
hang __________
low and
10. Stratus clouds are like __________
whole sky.
often cover the __________
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Four Corners Workbook
Clouds
19
Four Corners
WORKBOOK
Clouds
Publisher Jae-yoon Chung
Managing Director Hannah Lee
Senior Editor Jung-ah Kim
Project Editor Reese Ji
Written by Jeong Hee Choi
Proofread by Alwin G. Fontenot
Recorded by Yeasung Media Tech
Illustrated by Donghyun Lee, Youngjoo Jung
Designed by DOD Design
Printed by POD KOREA
Copyright © 2008 by Language World Co., Ltd.
All rights reserved. No part of this publication may be reproduced or distributed in any form
or by any means, or stored in a database or retrieval system,
without the prior written consent of Language World Co., Ltd., including, but not limited to,
in any network or other electronic storage or transmission, or broadcast for distance learning.
www.lwbooks.co.kr
First Edition in 2008
ISBN 978-89-256-0001-7