cambridge primary science 3 2ed workbook

This workbook is filled with exercises that help your students practise what they
have learnt and encourage them to think and work scientifically. Focus, Practice and
Challenge exercises provide clear progression through each topic, helping learners
see what they’ve achieved. The drawing and writing activities give learners more
experience with scientific vocabulary, which helps them to develop their language
skills. These different types of exercises and activities make the book ideal for use
in the classroom or as homework.

Cambridge Primary

Cambridge Primary Science

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Primary Science

Workbook 3

• Active learning opportunities help students apply their knowledge
to new contexts
• Three-tiered exercises in every topic help learners see and track their
own learning
• Varied exercise types keep learners interested
• Write-in for ease of use
• Answers to all activities can be found in the accompanying teacher’s resource

Science

9781108742771 Board and Cross Primary Science Workbook 3 CVR C M Y K

CAMBRIDGE

Workbook 3
Jon Board & Alan Cross

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Second edition

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CAMBRIDGE

Primary Science
Workbook 3
Jon Board & Alan Cross


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The exercises in this Workbook have been written to cover the Biology, Chemistry,
Physics, Earth and Space and any appropriate Thinking and Working Scientifically
learning objectives from the Cambridge Primary Science curriculum framework
(0846). Some Thinking and Working Scientifically learning objectives and the
Science in Context learning objectives have not been covered in this Workbook.
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Contents

Contents
How to use this book
1 ỵ Plants are living things
1.1
1.2
1.3
1.4

ỵ Alive or not aliveỵ
ỵ Plant parts ỵ
ỵ Plants need lightỵ
ỵ Plants need water and the right temperatureỵ

2
7
10
13

2 ỵ Mixing materials
2.1
2.2
2.3
2.4
2.5

ỵ Solids, liquids and gasesỵ
ỵ Separating mixturesỵ
ỵ Dissolvingỵ
ỵ Filteringỵ
ỵ Separating materials from rocksỵ

17
20
23
27
30

3 ỵ Light and shadowsỵ
3.1
3.2
3.3
3.4

ỵ Shadowsỵ
ỵ Changing shadowsỵ
ỵ Transparent materialsỵ
ỵ Translucent materialsỵ

34
37
40
43

iii

Contents

4 ỵ Staying aliveỵ
4.1
4.2
4.3
4.4

ỵ Human organsỵ
ỵ Animal groups and different life cyclesỵ
ỵ Food chainsỵ
ỵ Fossilsỵ

46
49
53
58

5 ỵ Forces and magnets
5.1
5.2
5.3
5.4
5.5

ỵ Forces and forcemetersỵ
ỵ Gravityỵ
ỵ Frictionỵ

ỵ Amazing magnetsỵ
ỵ Magnetic materialsỵ

62
65
68
72
75

6 ỵ The Earth and the Moon
6.1 ỵ The shape of the Earth, Sun and Moonỵ
6.2 ỵ The Moonỵ
6.3 ỵ The phases of the Moonỵ

iv

78
81
84


How to use this book

How to use this book
This workbook provides
questions for you to practise
what you have learned in
class. There is a topic to
match each topic in your
Learner’s Book. Each topic

contains the following
sections:
Focus: these questions help
you to master the basics

1.3 Plant and light

Practice: these questions
help you to become more
confident in using what you
have learned

Practice
Write the missing words.

leaves

small

tall

green

light

dark

[Black drawing of 2 plants in pots. One plant is tall with long stems and only
a few very small leaves. The other is shorter and has shorter stems, more
leaves and much larger leaves. The plants and leaves are a different shape

from those in the line drawing picture above.]
1 Living Things

Challenge: these questions
will make you think more
deeply

Challenge
Use the words to finish the sentences.

alive

not alive

Example: A ball is not alive.
A fish is ___________________.
A rock is __________________.
A cat can _____________.
A cat is ______________.

alive

not alive

food

move

The sun does not need ______________.
The sun is ________________.

1 Use the words to finish the sentences.
2 Write your own sentence about this living thing..
9

tree

leaves

big

small

tall

are

[b/w drawing
- Tall tree,
labeled ‘tree’
next to a lamp
post with
grass and sky
background]

v


1ỵ
Plants are living
things

1.1 Alive or not alive
Focus
1ỵ Look at these pictures. Draw each one in the correct group in the table.

ỵ

plant
river
ỵ

ỵ
2

match
match
ỵ match riverriver

clouds
plant

ỵ

clock
clouds

tree tree

ỵ

river

clouds clouc
ỵ plantplant plantclouds

sheep
ỵ clock

cactus
cactus

sheep


1.1 Alive or not alive

Alive

Not alive

3


1 Plants are living things

Practice
These are the seven rules to tell if something is a living thing.
...
moves

...can
have

young

it is alive
if it...

...needs
water and
food

...can sense
the world
around

...
grows

...makes
waste

...needs
air

2ỵ aỵ Look at the things in the table. Use the rules to decide if they are alive
or not.
Moves Needs
water
and
food
A goat
A cat

The Moon
A tree
A dolphin
An ant

4

�

�

Grows

Makes
waste

Needs
air

�

�

�

Can
Has Alive
sense young

�

�

�


1.1 Alive or not alive

bỵ Complete these sentences using your answers from the table.
Pick one thing that is alive and one thing that is not alive.
Aỵ I know

is alive because

.

Bỵ I know

is not alive because

.

Challenge
Look at the pictures below.

rain

plastic building block

wood

frog spawn
fan

crab

rock

tree

5


1 Plants are living things

3ỵaỵSort the things shown in the picture into the three groups
bỵ Draw each thing in the correct box.
Living things

Things that were
once alive

4ỵ Draw an object of your own in each box.

6

Things that have
never been alive

1.2 Plant parts

1.2 Plant parts
Focus

roots
leaf

flower
stem

1 Colour this plant and label it.
Use these words.

7


1 Plants are living things

Practice
Every part of the plant is important.
2ỵ Draw an arrow from the plant part to its important job.
Plant part

Important job

To make food for the
plant.
roots

To hold the plant down
and absorb water from
the soil.
flower

To make seeds.
stem

To hold the plant parts
up and transport water.
leaf
8


1.2 Plant parts

Challenge
Sofia wonders what would happen if a plant did not have all these
plant parts: roots, flower, stem, leaf.
3 Write in the bubbles what you think would happen to a plant
without these plant parts.

9


1 Plants are living things

1.3 Plants need light
Focus
Four similar plants are put in different places.

A
B

C

D

1 Look at the picture and answer the questions. Use the letters A, B, C or D.
will grow well because it has most light.

a Plant

,
and
b Plants
because they have less light.

would grow better if it was moved to

c Plant
.
10

will grow less well


1.3 Plants need light

Practice

Two similar plants are growing.
One is in the light, the other is in a dark box.
The plants have water.
2ỵ Draw what happens to the plants as they begin to grow.

11


1 Plants are living things

Challenge
Look at the four seeds below and the places they will grow.
They all get enough water, but will they grow well?
3 Look at the pictures and complete the sentences in the questions.
2

1

seed

seed

3

4
seed

seed
seed

a Plant

and
.

strongly because
b Plant
because

will not grow

and

will grow well

.

c Plants need light so that the leaves can make

12

.


1.4 Plants need water and the right temperature

1.4 Plants need water and
the right temperature
Focus
Plants need the right amount of water.

They also need the right temperature.
Look at these pictures. Is each plant growing well?
Plant A

Plant B

Plant C

1 Read these sentences.
Complete them by adding the right letter A, B or C.
a Plant

cannot grow well because it is too cold.

b Plant

cannot grow well because it is too hot.

c Plant
temperature.

can grow well because it has the right

13


1 Plants are living things

Practice
Three seeds were grown in different places.

A

B

sandy soil

C

good soil

stones

2 Complete these sentences.
Use these letters and words.

C

A

stones

water

absorb

sandy

root

good

a Plant B grew the best because the

soil held enough
enough

water for the plant to grow. The root could
water from the soil.
b Plant

grew the least because the
.

had no water. The root could not absorb any
c Plant

grew a little because the

absorbed a little water. The
water.
14

soil holds only a little


1.4 Plants need water and the right temperature

Challengeỵ
Arun had two plants that were the same.
He gave water to one plant.

He did not give water to the other plant.
Every day he measured the height of the plants.
Here are the results on day 1 and day 10.
Height

With water (cm)

No water (cm)

Day 1

4

4

Day 10

8

3

3ỵaỵ Draw the bar charts for each day.
Day 1

Day 10

9

9

8

8

7

7
Plant height (cm)

10

Plant height (cm)

10

6
5
4
3

6
5
4
3

2

2

1

1

0

0

water

no water

water

no water

15