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Cambridge Primary Science These workbooks are 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.
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CAMBRIDGE
Primary Science
• 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
Workbook 3
For more information on how to access and use your digital resource, please see inside front cover.
This resource is endorsed by Cambridge Assessment International Education
✓ P rovides learner support as part of a set of
resources for the Cambridge Primary Science curriculum framework (0097) from 2020
✓ H as passed Cambridge International’s rigorous quality-assurance process
✓ Developed by subject experts ✓ For Cambridge schools worldwide
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Jon Board & Alan Cross
Visit www.cambridgeinternational.org/primary to find out more.
Second edition
Digital access
Original material © Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
We are working with Cambridge Assessment International Education towards endorsement of this title.
Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
We are working with Cambridge Assessment International Education towards endorsement of this title.
1 Plants are living things Focus
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1.1 Alive or not alive
Look at these pictures. Draw each one in the correct group in the table.
match match match riverriver
river clouds clouds cloc plantplant plantclouds
SA
M
er
plant river plant
clouds plant clouds clock clouds clock sheep clock sheep
tree tree
sheep
cactus cactus
2 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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1.1 Alive or not alive
Not alive
SA
M
PL E
Alive
3 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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1 Plants are living things
Practice These are the seven rules to tell if something is a living thing. ... moves
...can have young
...needs water and food
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it is alive if it...
...can sense the world around
... grows
...makes waste
...needs air
M
Look at the things in the table. Use the rules to decide if they are alive or not. Grows
SA
Moves? Needs water and food
A goat
�
�
�
Makes waste
Needs air
Can sense
�
�
�
Has Alive? young
�
�
A cat
The Moon A tree
A dolphin An ant
4 Original material © Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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1.1 Alive or not alive
Complete these sentences using your answers from the table. Pick one thing that is alive and one thing that is not alive. is alive because
.
2 I know
is not alive because
.
Challenge
PL E
1 I know
SA
M
Sort these things into the three groups:
5 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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1 Plants are living things
1 Look at the eight pictures. a Sort these things into the three groups: b Draw each thing in the correct box. Things that were once Things that have never alive been alive
SA
M
PL E
Living things
2 Draw an object of your own in each box. 6 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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1.2 Plant parts
1.2 Plant parts
roots leaf
Focus
flower stem
SA
M
Use these words.
PL E
1 Colour this plant and label it.
7 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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1 Plants are living things
Practice Every part of the plant is important. 1 Draw an arrow from the plant part to its important job. important job
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plant part
To make food for the plant.
M
roots
To hold the plant down and absorb water from the soil.
SA
flower
To make seeds.
stem
To hold the plant parts up and transport water.
leaf 8 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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1.2 Plant parts
Challenge Sofia wonders what would happen if a plant did not have all these plant parts.
SA
M
PL E
1 Write in the bubbles what you think would happen to a plant without these plant parts.
9 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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1 Plants are living things
1.3 Plants need light Focus
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Four similar plants are put in different places.
M
A
SA
B
C
D
Look at the picture and answer the questions. 1 Plant
will grow well because it has most light.
2 Plants and because they have less light.
will grow less well
would grow better if it was moved to
3 Plant
.
10 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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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.
PL E
1 Draw what happens to the plants as they begin to grow. Plant with no light
SA
M
Plant with light
11 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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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? Look at the pictures and complete the sentence below each one. 2
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1
seed
seed
3
4
M
seed
SA
seed
1 Plant
and
strongly because
2 Plant
because
and
will not grow . will grow well
.
3 Plants need light so that the leaves can make
.
12 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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1.4 Plants need water and the right temperature
1.4 Plants need water and the right temperature Focus
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Plants need the right amount of water. They also need the right temperature.
Look at these pictures. Is each plant growing well? Plant B
Plant C
SA
M
Plant A
Read these sentences.
Complete them by adding the right letter A, B or C. 1 Plant
cannot grow well because it is too cold.
2 Plant
cannot grow well because it is too hot.
3 Plant
can grow well because it has the right temperature. 13
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1 Plants are living things
Practice Three seeds were grown in different places. B
sandy soil
C
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A
good soil
rocks
Complete these sentences.
A
M
Use these letters and words.
C
water
sandy
absorb
SA
root
good
1 Plant B grew the best because the
soil held enough enough
water for the plant to grow. The root could
water from the soil.
2 Plant
grew the least because the .
had no water. The root could not absorb any
3 Plant
grew a little because the
absorbed a little water. The
soil holds only a little water.
14 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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1.4 Plants need water and the right temperature
Challenge 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.
Height Day 1 Day 10
PL E
Here are the results on day 1 and day 10.
With water (in cm)
No water (in cm)
4
4
8
3
1 Draw the bar charts for each day. Day 1
8
6
SA
Plant height (cm)
7
5 4 3
Plant height (cm)
9
10
M
10
Day 10
9 8 7 6 5 4 3
2
2
1
1
0
water
no water
0
water
no water
15 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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1 Plants are living things
2 Which plant grew better? Why?
SA
M
PL E
3 How tall do you think the plant with water was on day 5?
16 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2 Mixing materials 2.1 Solids, liquids and gases Focus
SA
M
PL E
1 Label the things in the picture as solid, a liquid or gas.
17 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2 Mixing materials
Practice 1 Sort these materials into solid, liquid and gas groups.
PL E
brick
SHAMPOO
Add another material to each group.
shampoo
M
RICE
oil
SA
rice
Solid
oxygen
Liquid
air Gas
18 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2.1 Solids, liquids and gases
Challenge Use these words to finish the sentences.
liquid
solid
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1 A stays the same shape unless it is compressed, stretched, twisted or bent. changes shape easily.
2 A
Use these words to finish the sentences.
carbon dioxide
gases
solid
oxygen
nitrogen
M
3 Humans breathe a gas called 4 Vinegar is a
liquid
.
.
.
SA
5 Bicarbonate of soda is a
6 Mixing vinegar and bicarbonate of soda makes a gas called .
7 Air is a mixture of 8 Most of the air is a gas called
. . 19
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2 Mixing materials
2.2 Separating mixtures Focus 1 Label these diagrams.
mixture
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Use these words. magnet
sieve
mixture
N
M
S
SA
2 Fill in the missing words. Use these words.
magnet
seperate
separate
sieve
a We can use a of rice and beans.
to
a mixture
b We can use a of metal pins and sand.
to
a mixture
20 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2.2 Separating mixtures
Practice 1 a Draw lines to match each mixture to the sieve that can be used to separate it. b Finish each sentence. The
will go
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soil and roots
through the holes but the will not.
SA
M
rice and sand
rice and beans
The
will go
through the holes but the will not.
The
will go
through the holes but the will not.
21 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2 Mixing materials
Challenge
M
PL E
Zara has drawn two diagrams to show how she separated a mixture of sand and rocks.
Look at Zara’s diagrams. She has made some mistakes.
SA
She has not labelled all the equipment and all the materials in each diagram. Some of her diagram is not neat. 1 What mistake has she made in diagram 1?
2 What three mistakes has she made in diagram 2? a
b c 22 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2.3 Dissolving
2.3 Dissolving Focus Add the missing words to these sentences.
dissolve
PL E
Use these words. soluble
1 Sand is
insoluble
transparent
insoluble
in water.
2 Salt is
in cooking oil.
3 Salt is
in water.
.
M
4 The more water there is, the more salt can
5 When a solid dissolves in water the solid cannot be seen but .
SA
the water is still
23 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2 Mixing materials
Practice These children are doing an investigation that is unsafe.
SA
M
PL E
1 Circle three things that are dangerous.
2 Write two things these children should not do.
24 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2.3 Dissolving
Challenge Does more sugar dissolve when the water is warmer?
M
PL E
Zara and Marcus have investigated a science question.
SA
Here are their results.
Temperature of water
Number of teaspoons of sugar that dissolved
Cold
1
Warm
3
Hot
5
1 How many teaspoons of sugar dissolved in the warm water?
25 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2 Mixing materials
2 How many more teaspoons of sugar dissolved in the hot water than the cold water?
PL E
3 Explain the pattern in the results in the table.
4 Marcus and Zara were doing a fair test. What was the one thing they changed?
M
5 What was the one thing they measured?
SA
6 Write one thing they kept the same to make their test fair.
26 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2.4 Filtering
2.4 Filtering Focus 1 Write the correct sentence for each picture. Put the filter paper into the funnel.
Put a cup under the funnel.
SA
M
PL E
Pour the mixture into the filter paper.
27 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2 Mixing materials
Practice Sofia, Marcus and Zara are filtering dirty water. They all make different predictions.
The water will come out clean.
PL E
The water will still be very dirty when it comes out.
M
The water will be less dirty when it comes out.
SA
This is what happened.
28 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2.4 Filtering
1 a Was Sofia’s prediction correct? b How do you know? 2 a Was Marcus’s prediction correct?
PL E
b How do you know?
3 Was Zara’s prediction correct?
Challenge
Can these mixtures be separated using a filter? 1 a Water and sugar
M
b How do you know?
2 a Vinegar and salt
SA
b How do you know?
3 a Cooking oil and salt b How do you know?
29 Original material © Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2 Mixing materials
2.5 Separating materials from rocks Focus 1 Complete the grid using your answers to the questions below.
PL E
a
c
d
e
M
b
f
SA
a A material made from oil. (7 letters) b A gas that causes global warming. (6 letters/7 letters) c Materials that are not made but are found on planet Earth. (7 letters) d Metals are made from these. (4 letters) e This material is a fuel. (6 letters) f Making metal is called
(8 letters)
30 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2.5 Separating materials from rocks
Practice
PL E
1 Name three fuels.
2 What material do fuels contain?
3 What happens when fuels are burned?
M
4 Give an example of humans burning fuel.
SA
5 Why is global warming a problem?
Challenge
Cobalt mining fact file
What? A cobalt metal mine
Where? A country called D.R. Congo
Why? Cobalt is used to make mobile phone batteries
Who? Young children
31 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2 Mixing materials
M
PL E
Cobalt mining
SA
Cobalt is a metal used to make batteries for mobile phones and electric cars. Cobalt ore is mined in a country called the Democratic Republic of Congo, in Africa. Many people who live there are very poor. Children work in the mines to make money to live. They are not paid very much for the work. The mines are not safe so the children can get hurt or can become ill. Some children who work in the mine are only seven years old. They break the rocks to separate the cobalt ore from the rock. Some people who make mobile phones and electric cars try not to buy cobalt from mines that use children. Others do not find out where the cobalt they buy comes from.
32 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.
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2.5 Separating materials from rocks
1 What kind of material is cobalt? 2 What is cobalt used for?
PL E
3 How do they separate the cobalt ore from the rocks?
4 Why do the children work in the mine?
SA
M
5 What could people who buy mobile phones or electric cars do to help?
33 Original material Š Cambridge University Press 2021. This material is not final and is subject to further changes prior to publication.