Level 3
1.
Popcorn
(a)
Sasha watches her father make some popcorn.
These pictures show what he does.
1. Put the corn in a saucepan.
2. Add some oil.
3. Put a lid on and heat the corn.
4. Add some salt.
lt
sa
Use the pictures.
Tick ONE box after each sentence to show if it is true or false.
The pictures show that as the corn pops, it...
True
False
gets bigger.
changes to a darker colour.
changes shape.
gets smoother.
2 marks
John Buchan Middle School
1
(b)
After the corn is cooked it is hot.
What should Sasha measure to find out how hot the popcorn is?
Tick ONE box.
Sasha should measure the...
mass.
temperature.
volume.
time to cook.
1 mark
(c)
Look at the pictures above.
Tick ONE box to show what is most likely to cause the corn to change.
salt
oil
heat
saucepan
1 mark
(d)
When corn is popped, a new material is formed.
This change is not reversible.
Describe a different non-reversible change where another new material is
formed.
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1 mark
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2
2.
Flames
(a)
Halim watches dead leaves in a bonfire. He can see smoke rising from the fire.
Tick ONE box to show what the smoke is.
Smoke is ...
liquid from
evaporation.
new materials made
by burning.
liquid from melting.
new materials made
by the leaves.
1 mark
(b)
The next day, Halim’s teacher holds some materials over a candle flame.
Describe ONE thing in the picture that Halim’s teacher has done to help
make the investigation safe.
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1 mark
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3
(c)
Halim records the results in a table.
Write yes or no in each row to show whether the changes are reversible.
Material
Does it burn?
wood
yes
bread
yes
Is the change
reversible?
1 mark
(d)
Halim wants to know what other materials will burn.
Tick the boxes next to all the materials below that burn in a candle flame.
One has been done for you.
cardboard
cotton wool
stone
kitchen foil
newspaper
steel wool
2 marks
John Buchan Middle School
4
Level 4
3.
In the kitchen
(a)
Layla collects different objects from the kitchen.
glass
foil
rolling
pin
plastic
food wrap
candle
She looks at some of the properties of the materials these objects are made from.
Write a
or
materials.
in each empty box in the table to show the properties of the
Material/Object
Flexible
Hard
Transparent
aluminium foil
wax candle
wooden rolling pin
plastic food wrap
glass
1 mark
(b)
Aluminium foil is flexible.
Give ONE use of aluminium foil in the kitchen where it is important that the foil
is flexible.
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1 mark
John Buchan Middle School
5
(c)
Layla knows some changes are reversible.
Tick THREE boxes to show which changes are reversible.
cooling water
cooking bread
boiling an egg
freezing water into ice
mixing vinegar with
bicarbonate of soda
burning a candle
dissolving salt in water
2 marks
(d)
Layla watches some water boiling near a window.
The picture shows what she can see on the window.
(i)
Write the missing label for the picture below by choosing from the words in
the box below.
water vapour
condensation
steam
smoke
window
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1 mark
John Buchan Middle School
6
(ii)
Why does the level of the water inside the saucepan go down if the water
continues to boil?
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1 mark
4.
Adding water
(a)
Safara wants to find out what happens when solids are mixed with water.
She adds water to four different solids and stirs the mixtures. After 20 minutes
she draws pictures of her results.
colourless
liquid
cloudy
liquid
solid
pieces
brown
solid
beaker A
beaker B
colourless
liquid
beaker C
coloured
liquid
bubble
beaker D
The table below names the four solids that Safara mixed with water.
Which solid was in each beaker?
Write A, B, C or D to complete each row of the table.
Solid
Beaker
soil
vitamin tablet
plastic beads
salt
1 mark
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(b)
Explain what happened to the solid in beaker C.
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1 mark
(c)
In which beaker was there a non-reversible change?
Beaker ............................................
1 mark
(d)
Safara wants to separate the soil from her mixture of soil and water.
Tick ONE box to show which equipment would be best for separating the soil
from the water.
35
30
25
20
15
10
5
0
1 mark
John Buchan Middle School
8
(e)
Safara wants to separate the salt from her mixture of salt and water.
Describe how Safara could get solid salt back from the salt and water mixture.
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1 mark
5.
Acid rain
(a)
Sometimes rain mixes with pollution in the air to form acid rain.
Some children want to find out what happens when acid rain falls on rocks.
Vinegar can be used to show the effects of acid rain. The children
add vinegar to chalk rock. The pictures below show what happens.
bubble
vinegar
dish
Chalk rock
Chalk rock and
vinegar
Bubbles are produced.
Write true or false next to each sentence below.
The change is non-reversible.
...............................................
The bubbles evaporate.
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1 mark
John Buchan Middle School
9
(b)
Write solid, liquid or gas next to each material in the table.
Material
Solid, liquid or gas?
inside the
bubble
vinegar
chalk rock
1 mark
(c)
The children test more rocks. The table below shows their results.
Rock
Are bubbles produced
when vinegar is added?
granite
no
sandstone
no
limestone
yes
slate
no
pumice
yes
Look at these pictures of a statue. The statue is in a city that has acid rain.
Statue when new
Same statue after 200 years
Use the table to name ONE rock that this statue could have been made from.
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1 mark
John Buchan Middle School
10
Level 5
6.
Yeast
(a)
Yeast is a type of micro-organism.
Class 6G know that bread needs yeast to rise.
The yeast must be mixed with water and sugar.
They want to find out if the temperature of the water affects the yeast.
They put sugar in a bottle and add water at a temperature of 20°C.
Name the scientific word that describes what happen to the sugar when it is
mixed with water.
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1 mark
(b)
The class then add yeast to the sugar and water in the bottle.
They put a balloon over
the top of the bottle.
They time how long it takes
for the balloon to stand up.
Write true or false next to each statement about the investigation.
True or false?
A gas is produced by the yeast.
..........................
A reversible change has happened.
..........................
The balloon is flexible.
..........................
1 mark
John Buchan Middle School
11
(c)
The class repeat the test using water at different temperatures.
The teacher adds the same amount of yeast, sugar and water each time.
The table below shows their results.
Temperature of water
(ºC)
3
20
30
50
Time taken for balloon
to stand up (mins)
52
18
16
4
Describe how the temperature of the water affects the time taken for the balloon
to stand up.
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2 marks
(d)
A cook book says that yeast works most quickly with water at a temperature of
20ºC to 30ºC.
(i)
Tick ONE box to show if the results in the table support the information in
the cook book.
yes
(ii)
no
Use examples from the results table to help you explain your answer.
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1 mark
John Buchan Middle School
12
7.
Burning Candles
(a)
Dianne put a wax candle on some scales.
The teacher lit the candle and left it to burn.
Dianne noticed a liquid around the bottom of the wick.
What is this liquid?
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1 mark
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13
(b)
Write the name of the process when a solid turns to a liquid.
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1 mark
(c)
Dianne measured the mass of the candle every 30 minutes.
Her results are shown on this graph.
Look at the graph.
What happened to the mass of the candle while it was burning?
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1 mark
(d)
Gareth said, ‘When the candle wax burns, the change can be reversed.’
Dianne did not agree with him. She said, ‘This change is irreversible’.
Explain why Dianne is correct.
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1 mark
John Buchan Middle School
14