SCIENCE

YEAR 3

LEVELS 2 - 4

Name

Class

Total: Level:

1. Materials and their Properties

Tick ONE box to complete each sentence:

(a) Plastic is used for trays because it

... is light

... bends

... floats

(b) Wood is used for matches because it

... floats

... snaps

... burns

(c) Steel is used for nails because it

... does not bend easily

... rusts

... is shiny

1 mark

1 mark

1 mark

2. Teeth

(a) Most human babies are born without teeth.

Why do babies not need teeth?

.............................................................................................................

.............................................................................................................

.............................................................................................................

(b) How many sets of teeth do humans grow during their lives?

.............................................................................................................

(c) What do teeth do?

Tick TWO boxes.

grind up food

break down food chemically

help to taste food

tear off lumps of food

grow fillings

1 mark

1 mark

1 mark

1 mark

60 50 40 30 20 10 2 4 6 8 10 12

This side of the chart shows the mean(average) amount of sugar eaten inone year by a person in each place.

This side of the chart shows the mean(average) number of decayed teethfor a person in each place.

Mean (average) amount of sugar eaten, in kg Mean (average) number of decayed teeth

Use the information in the chart to answer these questions.

(d) Which place has the least tooth decay?

.............................................................................................................

(e) In which place do people eat the most sugar?

.............................................................................................................

(f) How could people alter their diets to reduce tooth decay?

.............................................................................................................

.............................................................................................................

1 mark

1 mark

1 mark

3. Fabrics (a) Some children carried out two fair tests on three different fabrics,

A, B and C.

First they hung a 100 g mass from the bottom of each fabric. Secondly they soaked each fabric in water.

What is the name of the force pulling downwards on the 100 g mass?

.............................................................................................................

(b) The table shows the results of their two tests.

fabric A fabric B fabric C

how far the fabricstreched, in cm

how much water wassoaked up, in cm³

0 6 15

35 52 9

Some children wanted a fabric which does not stretch.

Which fabric should they choose?

Tick ONE box.

A B C

1 mark

1 mark

(c) Which fabric soaked up most water?

.........................................................................

(d) Use the information in the table to give TWO reasons why fabric is C better for swimwear than fabric A.

(i) .........................................................................................................

(ii) ........................................................................................................

1 mark

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1 mark

4. Magnets (a) Vicky has a magnet in her hand.

There are some objects in the box.

Vicky is going to find out which objects are attracted by her magnet.

Compare the table of results by putting ONE tick so show the correct

result for each object.

One has been done for you.

wooden pencil

steel safety pin

plastic bead

cardboard box

copper wire

is attracted is not attracted

1 mark

1 mark

(b) Which TWO of these metals will attract the magnet?

Tick TWO boxes.

iron aluminium

brass steel

copper lead

(c) Complete the following sentences using either repel or attract.

(i) The North pole of a magnet is held near the North pole of another magnet.

The magnets .................................................... each other.

(ii) The South pole of one magnet is held near the North pole of another magnet.

The magnets .................................................... each other.

1 mark

1 mark

1 mark

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5. Lamp (a) At night, Ben switches on the lamp in his room.

There is a shadow of the chair on the floor.

Explain how the shadow is formed from the light of the lamp.

………………………………………………….........……….....……………

...............................................................................................................

(b) Ben looks at the window, and sees a reflection of the lamp.

shadow of chair

reflection oflamp

lamp

Why is there a reflection of the lamp in the window?

Tick ONE box.

There is a reflection of the lamp in the window because the window is . . .

shiny hard

strong solid

1 mark

1 mark

(c) Draw TWO arrowheads on the lines in the picture below to show how

light travels to let Ben see the reflection of the lamp.

1 mark

6. Rocks (a) Jo and Kelly tried scratching rock samples with a fingernail and

with steel. A fingernail is quite soft. Steel is hard.

They recorded their results.

Rock Scratched withfingernail steel

chalk

flintgranitesandstone

= made a scratch

a scratch= did not make

Which is the softest rock in the table?

............................................................................................................. (b) Use the table to decide if steel is harder than flint.

Tick ONE box.

yes no maybe can’t tell

(c) Explain your answer to part (b).

.............................................................................................................

.............................................................................................................

(d) Name ONE rock in the table which is harder than sandstone.

.............................................................................................................

1 mark

1 mark

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7. Growing Seeds (a) Martin and Jane are growing seeds.

Tick ONE thing all the seeds must have to start to grow.

light water

salt soil (b) The seeds start to grow.

Martin covers the seedlings with a polythene bag. Jane covers her seedlings with black paper.

After a few days the leaves of Jane's seedlings are yellow.

Why do the seedlings under the black paper have yellow leaves?

……………………………………..…………………………………………

1 mark

1 mark

(c) Martin's seedlings grow strong and healthy leaves.

Explain why the leaves are important to a plant.

……………………………………..…………………………………………

(d) Martin measures the roots of his pea seedlings.

Graph to show rate of growth of roots

Length ofroot (mm)

50

40

30

20

10

00 4 8 12 16 20 24

Day Look at the graph.

When are the roots growing fastest?

Tick ONE box.

day 0 to day 4

day 8 to day 12

day 16 to day 20

day 20 to day 24

1 mark

1 mark

8. Paper Towels (a) Each of four children examined a different type of paper towel.

Decide the kind of statement all the children have made.

Tick ONE box.

a prediction a measurement

a plan an observation

1 mark

(b) Robert and Lauren dropped water onto the four towels until they would hold not more water.

They recorded their results in a table.

Type of paper towel Amount of water soaked up (cm3)

Wipa 12

Soaka 18

Moppa 9

Cleana 15

They are trying to find out something about the towels.

What question were the children investigating?

...............................................................................................................

...............................................................................................................

(c) What is the ONE factor they changed as they carried out their investigation?

...............................................................................................................

1 mark

1 mark