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SATs / End of key stage 2 Science Assessment: Chemistry

In this assessment, students will review their understanding of various topics across the Chemistry programmes of study at key stage 2. This is a timed activity. It may take approximately 45 minutes to complete.

'SATs / End of key stage 2 Science Assessment: Chemistry' worksheet

Key stage:  KS 2

Curriculum topic:  End of Key Stage Assessments

Curriculum subtopic:  Starter Assessment

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

In this assessment, we'll review your understanding of Chemistry at key stage 2.  This is a timed activity and will take approximately 45 minutes to complete the assessment. Don't worry if it takes you a bit longer.

Choose THREE materials which are good thermal conductors

steel

wool

copper

wood

aluminium

Malik makes a simple electrical circuit using wires, a battery and a bulb. He leaves a break in the circuit which he uses to test the electrical conductivity.

Predict which THREE of these objects, when connected to the circuit, will make the bulb light.

metal paperclip

plastic ruler

graphite pencil sharpened at both ends

wooden lolly stick

gold ring

Which THREE of these materials are non-magnetic

gold

glass

iron

steel

diamond

From the list choose the material which is.....

  • not magnetic
  • not transparent
  • not an electrical conductor
  • waterproof

 

Which one is it?

newsaper

plastic straw

copper pipe

 

Plastic is used for the outside of an electric cable because it is ...

waterproof

an electrical conductor

an electrical insulator

colourful

Which of these materials would you NOT use to make a saucepan out of?

metal

glass

china

plastic

How many reasons would you choose to explain why plastic is good for making these toy bricks?

 

light

strong

colourful

soft

magnetic

sticky

easy to shape/mould

melts easily

easy to swallow

If you were to rub different types of rock on a rough surface you would find that some of them were quite soft, with a little of the rock wearing off, while others were hard and nothing was left behind. From your knowledge of rocks, tick the ones that you think would wear away. (Tick two boxes)

 

           
Granite  Slate Chalk   Sandstone Flint   Marble

 

granite

slate

chalk

sandstone

flint

marble

Choose TWO rocks from this list that are PERMEABLE.

 

 

           
Granite  Slate Chalk   Sandstone Flint   Marble

 

 

granite

slate

chalk

sandstone

flint

marble

Chalk and limestone are both soft rocks.

Marble and slate are much harder rocks which were made when rocks like limestone and chalk were squashed together for millions of years.

Which of these rocks is most likely to contain fossils?

Tick two answers.

chalk

limestone

marble

slate

T. Rex lived millions of years ago. Like modern animals, T. Rex would have been made up of muscles, bones and other tissues.

 

Which parts of T. Rex would be preserved by fossilisation?

Tick three answers.

claws

eyes

muscle

skull

teeth

tongue

Which THREE of these statements are true for SOLIDS? 

they have a flat surface

they can be poured

they can be cut or shaped

they do not take the shape of their container

they occupy a definite amount of space

Which THREE statements are true about LIQUIDS? 

they flow back if 'pushed'

they turn to a gas if cooled

they spread out to fill their container

their surface is flat

they take the shape of their container

What is the word that describes what happens when a solid changes in to a liquid?

solidifying

vanishing

melting

dissolving

What is the word that describes what happens when a liquid turns into a solid?

freezing

melting

cooling

moulding

All gases have which two of these properties?

colourless

easy to compress

have a definite volume

can spread to fill a container

poisonous

Complete the following statement:

If a gas is cooled enough, it condenses into a __________.

Here is a list of different substances. Decide whether each one will dissolve in cold water or not and then complete the chart at the bottom.

Column A

Column B

orange juice
dissolves
custard powder
doesn't dissolve
aspirin
doesn't dissolve
candle wax
dissolves
gravy granules
doesn't dissolve
sugar
doesn't dissolve
tea leaves
doesn't dissolve
sand
dissolves
salt
dissolves
hot chocolate powder
dissolves

Which of the following will leave a solid behind when the liquid is evaporated?

distilled water

tap water

sea water

pure alcohol

cup of tea

Fruit Shoot drink

If you had a mixture of pebbles, sand and salt - what would be your best choice for separating the pebbles from the sand and salt?

sieve

filter

cup of water

One method of separating different mixtures is called FILTRATION. This uses a special filter paper (like in a coffee machine) with tiny holes in.

If you put a piece of filter paper in a funnel and poured some salty water/sand mixture into it, what do you think would be left behind in the filter paper?

sand

salt

nothing

Match up these changes of state with the correct stage in the water cycle.

Column A

Column B

melting
water droplets form clouds
condensing
ice changes to water
freezing
snowflakes form
evaporating
water changes into vapour

Which TWO of these weather conditions increase the rate of evaporation?

hailstones

strong breeze

sunshine

fog

Soil contains lots ands lots of different-sized particles ("bits"). What type of particles do all types of soil contain?

sand

rock

chalk

In natural habitats, leaves and other parts of plants fall on to the surface of the soil where they rot down to form compost. This compost acts as a natural...

fertiliser

insulator

waterproof layer

Is it possible to get the substance (like salt) back out of the liquid?

no, they're combined into a single substance now

yes, you boil it and collect the gas

yes, you evaporate the liquid away

When bicarbonate of soda is added to vinegar the two react together: the mixture fizzes and carbon dioxide gas is released.

Is it possible to reverse this reaction?

yes, you bubble the gas back through the liquid to get the vinegar and bicarbonate back again

no, gases are always released from irreversible reactions

no, new chemicals are formed so the reaction cannot be reversed

Which one of the following changes is NOT reversible?

your ice lolly melting on a hot day

baking dough into bread

dissolving a spoonful of coffee in water

Imagine that your friend said that salt, instant coffee and boiled sweet could all be retrieved from a solution in water (in other words their dissolving is reversible). How could you see if they are right?

filter it

evaporate the water

heat it up

When vinegar and bicarbonate of soda are added together an exciting fizzing reaction takes place - it's often used in pretend volcanos. The gas given off in this reaction is carbon dioxide. Why do you think that this change cannot be reversed?

 

 Watch this video to see the reaction:

changes involving chemicals can never be reversed

once released, the carbon dioxide cannot be recaptured

once released, the carbon dioxide cannot be put back to form the original chemicals

  • Question 1

Choose THREE materials which are good thermal conductors

CORRECT ANSWER
steel
copper
aluminium
EDDIE SAYS
Saucepans and radiators are made from metals because they transfer heat quickly and easily.
  • Question 2

Malik makes a simple electrical circuit using wires, a battery and a bulb. He leaves a break in the circuit which he uses to test the electrical conductivity.

Predict which THREE of these objects, when connected to the circuit, will make the bulb light.

CORRECT ANSWER
metal paperclip
graphite pencil sharpened at both ends
gold ring
EDDIE SAYS
Metals are good electrical conductors. The graphite in a pencil is a form of carbon. Although carbon is a non-metal, it is also a good conductor of electricity!
  • Question 3

Which THREE of these materials are non-magnetic

CORRECT ANSWER
gold
glass
diamond
EDDIE SAYS
Iron is a magnetic metal. Steel is mostly made of iron (about 98%) so is also magnetic. Although gold is a metal it's important to remember that there are only three magnetic metals: iron, nickel (try a newish 2p coin which is nickel underneath) and also cobalt.
  • Question 4

From the list choose the material which is.....

  • not magnetic
  • not transparent
  • not an electrical conductor
  • waterproof

 

Which one is it?

CORRECT ANSWER
plastic straw
EDDIE SAYS
Copper is a conductor, newspaper is nearly right, but it's not waterproof, so the answer is a plastic straw.
  • Question 5

 

Plastic is used for the outside of an electric cable because it is ...

CORRECT ANSWER
an electrical insulator
EDDIE SAYS
With an electric cable you do not want to come into contact with the strands of metal carrying the electric current, so the plastic coating (known as insulation) keeps you safe by protecting you from the electricity. The plastic does not conduct electricity - it is an insulator.
  • Question 6

Which of these materials would you NOT use to make a saucepan out of?

CORRECT ANSWER
plastic
EDDIE SAYS
Plastic's no good as saucepans have to be heated and the plastic will melt. Metal is the commonest material for saucepans, heat-resistant glass is often used as well as china/pottery ones.
  • Question 7

How many reasons would you choose to explain why plastic is good for making these toy bricks?

 

CORRECT ANSWER
light
strong
colourful
easy to shape/mould
melts easily
EDDIE SAYS
Plastic is great for these bricks: it melts at a fairly low temperature and so is easy to shape, it's light and strong and easy to colour. You might have said it's sticky as the bricks 'stick' together easily! Luckily the plastic isn't actually sticky!
  • Question 8

If you were to rub different types of rock on a rough surface you would find that some of them were quite soft, with a little of the rock wearing off, while others were hard and nothing was left behind. From your knowledge of rocks, tick the ones that you think would wear away. (Tick two boxes)

 

           
Granite  Slate Chalk   Sandstone Flint   Marble

 

CORRECT ANSWER
chalk
sandstone
EDDIE SAYS
Both chalk and marble are soft enough to have little bits of them rubbed off on sandpaper, so you can see a smear of rock left behind. The others are much harder and the surface may just scratch a little.
  • Question 9

Choose TWO rocks from this list that are PERMEABLE.

 

 

           
Granite  Slate Chalk   Sandstone Flint   Marble

 

 

CORRECT ANSWER
chalk
sandstone
EDDIE SAYS
Interestingly the two soft rocks were also the permeable ones - water can slowly soak into both chalk and sandstone because the spaces between the grains or particles of rock are big enough. The others have smoother surfaces with small, tightly packed grains that won't let water through.
  • Question 10

Chalk and limestone are both soft rocks.

Marble and slate are much harder rocks which were made when rocks like limestone and chalk were squashed together for millions of years.

Which of these rocks is most likely to contain fossils?

Tick two answers.

CORRECT ANSWER
chalk
limestone
EDDIE SAYS
Chalk and limestone are sedimentary rocks.
Marble and slate are metamorphic rocks; they are made when sedimentary rocks are squashed under lots of pressure and at high temperatures.
What do you think would happen to any of the fossils in sedimentary rock when it changes to metamorphic rock?
  • Question 11

T. Rex lived millions of years ago. Like modern animals, T. Rex would have been made up of muscles, bones and other tissues.

 

Which parts of T. Rex would be preserved by fossilisation?

Tick three answers.

CORRECT ANSWER
claws
skull
teeth
EDDIE SAYS
Remember, the hard parts of an animal (like its bones) are preserved by fossilisation. Softer parts like the eyes, tongue and muscle are broken down by bacteria and other micro-organisms.
  • Question 12

Which THREE of these statements are true for SOLIDS? 

CORRECT ANSWER
they can be cut or shaped
they do not take the shape of their container
they occupy a definite amount of space
EDDIE SAYS
Solids, like wood/metal/plastic/etc. are materials that you can hold (as long as it's not hot!), they occupy a definite amount of space and don't change their shape (unless you can squeeze them, like clay), unlike gases (which spread out everywhere) and liquids (which take on the shape of their containers).
  • Question 13

Which THREE statements are true about LIQUIDS? 

CORRECT ANSWER
they flow back if 'pushed'
their surface is flat
they take the shape of their container
EDDIE SAYS
Liquids, like water/oil/milk/mercury, are 'runny' which means that when you pour a liquid into a container, it takes on the shape of that container (like a drinks can) and when it's sitting there it has a flat surface.
  • Question 14

What is the word that describes what happens when a solid changes in to a liquid?

CORRECT ANSWER
melting
EDDIE SAYS
Solids have to melt before turning into liquids.
  • Question 15

What is the word that describes what happens when a liquid turns into a solid?

CORRECT ANSWER
freezing
EDDIE SAYS
When liquids freeze, they turn into solids. For example, when you put water in the freezer it turns into ice.
  • Question 16

All gases have which two of these properties?

CORRECT ANSWER
easy to compress
can spread to fill a container
EDDIE SAYS
Many gases are colourless and poisonous but all are easy to compress (squash) and can spread out to fill a container. For example, spray some deodorant or perfume in the corner of the room and see how long before your friend can smell it on the other side of the room.
  • Question 17

Complete the following statement:

If a gas is cooled enough, it condenses into a __________.

CORRECT ANSWER
liquid
EDDIE SAYS
When a gas, like oxygen, is cooled down enough, the particles it is made of lose energy and move slower and slower until they form a liquid. For oxygen this happens at .... minus 183 degrees Celsius (-183C)!
  • Question 18

Here is a list of different substances. Decide whether each one will dissolve in cold water or not and then complete the chart at the bottom.

CORRECT ANSWER

Column A

Column B

orange juice
dissolves
custard powder
doesn't dissolve
aspirin
dissolves
candle wax
doesn't dissolve
gravy granules
dissolves
sugar
dissolves
tea leaves
doesn't dissolve
sand
doesn't dissolve
salt
dissolves
hot chocolate powder
doesn't dissolve
EDDIE SAYS
As time goes by and you have a chance to experience more and more substances you learn the sort of thing that dissolves in cold water - for example, just try making a nice cup of cold chocolate (with hot choc powder and cold water) and see what you think!
  • Question 19

Which of the following will leave a solid behind when the liquid is evaporated?

CORRECT ANSWER
tap water
sea water
cup of tea
Fruit Shoot drink
EDDIE SAYS
They all will unless the liquid is pure: only pure (distilled) water and pure alcohol are pure liquids with no dissolved solids in to leave behind when they evaporate away.
  • Question 20

If you had a mixture of pebbles, sand and salt - what would be your best choice for separating the pebbles from the sand and salt?

CORRECT ANSWER
sieve
EDDIE SAYS
You need something with fairly big holes to catch the pebbles and let the sand/salt mixture through - a sieve's best.
  • Question 21

One method of separating different mixtures is called FILTRATION. This uses a special filter paper (like in a coffee machine) with tiny holes in.

If you put a piece of filter paper in a funnel and poured some salty water/sand mixture into it, what do you think would be left behind in the filter paper?

CORRECT ANSWER
sand
EDDIE SAYS
The tiny holes in the filter paper will be able to trap the grains of sand, and stop them getting through, so you would see the sand stuck in the filter. The salty water will have passed through the holes with no difficulty.
  • Question 22

Match up these changes of state with the correct stage in the water cycle.

CORRECT ANSWER

Column A

Column B

melting
ice changes to water
condensing
water droplets form clouds
freezing
snowflakes form
evaporating
water changes into vapour
  • Question 23

Which TWO of these weather conditions increase the rate of evaporation?

CORRECT ANSWER
strong breeze
sunshine
EDDIE SAYS
Think hair dryer! A strong stream of warm air! As the water particles evaporate from the surface of the water (the warmth makes them jiggle around faster), they are blown away and this creates space for more particles to evaporate into.
  • Question 24

Soil contains lots ands lots of different-sized particles ("bits"). What type of particles do all types of soil contain?

CORRECT ANSWER
rock
EDDIE SAYS
Soil is formed as rocks are worn down by weathering. Lots do contain sand, but by no means all.
  • Question 25

In natural habitats, leaves and other parts of plants fall on to the surface of the soil where they rot down to form compost. This compost acts as a natural...

CORRECT ANSWER
fertiliser
EDDIE SAYS
There are masses of important minerals locked away in all that dead plant material which are released back into the soil as it rots into compost - so it acts as a natural fertiliser.
  • Question 26

Is it possible to get the substance (like salt) back out of the liquid?

CORRECT ANSWER
yes, you evaporate the liquid away
EDDIE SAYS
Imagine a pond with fish swimming around in it: what happens if the water evaporates away? The fish are left behind (they are solid(ish!)) and cannot evaporate. It's the same with solids like salt that dissolve - evaporate the liquid and they are left behind.
  • Question 27

When bicarbonate of soda is added to vinegar the two react together: the mixture fizzes and carbon dioxide gas is released.

Is it possible to reverse this reaction?

CORRECT ANSWER
no, new chemicals are formed so the reaction cannot be reversed
EDDIE SAYS
When a reaction happens, new chemicals are formed. In this case a gas is one of them and the carbon dioxide disappears off into the air. Even if you could get it back there's no way of returning to the original vinegar and bicarbonate of soda - it's IRREVERSIBLE.
  • Question 28

Which one of the following changes is NOT reversible?

CORRECT ANSWER
baking dough into bread
EDDIE SAYS
The molten lolly can be frozen into a solid again, the coffee can be recovered by evaporating the water but once dough is baked into bread it cannot be made back into dough by any process: it's irreversible.
  • Question 29

Imagine that your friend said that salt, instant coffee and boiled sweet could all be retrieved from a solution in water (in other words their dissolving is reversible). How could you see if they are right?

CORRECT ANSWER
evaporate the water
EDDIE SAYS
All solutions are a liquid (usually water) with a solid in tiny particles spread around in it. If you gently evaporate the water away, the solid will be left behind (just like the fish in a pond in Africa as the water level goes down).
  • Question 30

When vinegar and bicarbonate of soda are added together an exciting fizzing reaction takes place - it's often used in pretend volcanos. The gas given off in this reaction is carbon dioxide. Why do you think that this change cannot be reversed?

 

 Watch this video to see the reaction:

CORRECT ANSWER
once released, the carbon dioxide cannot be put back to form the original chemicals
EDDIE SAYS
When two things react and release a gas that's going to be a permanent (irreversible) change: you cannot collect that gas and somehow add it back into what's left and expect it to magically return to its original state!
---- OR ----

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