5D Changing State Questions PDF

8/9/2019 5D Changing State Questions PDF

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John Buchan Middle School 1

John Buchan Middle School

Science Test Revision

5D Changing State

52 min

50 marks

Name




Level 3

1. Changes

(a) Kim and Juan change the way some things look. The pictures below show thechanges.

Which changes are reversible?

Tick ONE box for each change.

Is this change reversible?

Yes No

Bread

Paper

Plasticine Plasticine snail

Ice

Toast

Ash

Water

2 marks




2. Drying sponge

(a) Dinesh puts a wet sponge on some scales.He records its mass during the day.

He draws a graph of his results.

50

40

30

20

10

0

0 1 2 3 4 5 6

Time (hours)

Mass ofsponge

(g)

What is the mass of the wet sponge at the start of the investigation?

..................................................... g1 mark

5




(b) Describe how the mass of the wet sponge changes over the first four hours.

......................................................................................................................1 mark

(c) What process causes the mass of the drying sponge to change?

......................................................................................................................1 mark

(d) What is the mass of the dry sponge?

..................................................... g1 mark

(e) Some other children discuss Dinesh’s results.Look at their ideas below.

Use the graph to help you write true or false next to each idea.

The sponge driedmost quickly in thefirst two hours.

Bob

Ruth

The sponge wasstill drying afterfive hours.

Komal

There was 20g ofwater in thesponge at the start.

1 mark




Level 4

3. Sweets

(a) Alisha and Peter have some small sweets.

Peter puts one on his tongue.

Peter made a plan to test his idea that the sweet dissolves.

How long did Peter plan to leave the sweet in water?

....................................................hours1 mark






(d) Alisha made a plan to test her idea that the sweet melts rather than dissolves.

Where should Alisha put her sweet to test her idea that it melts?

Tick ONE box.

a cold place a hot place

a dry place a wet place

1 mark

4. Keeping cool

(a) Jamal is thinking about how to keep ice cubes from changing into water on a hotday.

Jamal says ‘I think if you put the ice cubes inside lots of plastic bags they will stayfrozen for longer.’

Tick ONE box to show what sort of statement Jamal has made.

an observation a prediction

a conclusion a measurement

1 mark




(b) Jamal puts four ice cubes in different numbers of plastic bags.

He records the time it takes the ice cubes to change to water.

Name the process that describes the change from ice to water.

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

1 mark

(c) Jamal records his results in a table.

Number ofplastic bags

Time for ice to changeto water (minutes)

0 140

1 160

2 205

3 225

Choose ONE word from the box below to complete the sentence about the plasticbags.

dissolved condensed heated insulated evaporated

The table shows that the ice is ............................................... by the plastic bagsso that the ice changes to water more slowly.

1 mark




(d) Tick ONE box to show the temperature of water when it changes to ice.

–10°C 0°C 10°C 100°C

1 mark

5. Water cycle

(a) Evaporation and condensation are changes that happen in the water cycle.

Are evaporation and condensation reversible? Write yes or not on each row.

Change Is the change reversible?

evaporation

condensation

1 mark

(b) This diagram shows the water cycle.

Water changes to vapourand rises into the air.

Water vapour coolsand forms clouds.

rivers and seas.Rain falls tothe ground.

2 3

41

1 mark




In which stage of the water cycle above does condensation occur?Tick ONE box.

1 2 3 4

(c) If the temperature is very cold, the rain cools down and changes.

What change will happen to the rain if it gets very cold?

.......................................................................................................................1 mark




6. Toffee

(a) Adrian and his dad are cooking toffee. The pictures below show how they makethe toffee.

1. Put a metal tray into afreezer for an hour.

2. Stir sugar into some coldwater.

3 Heat the mixture until itturns golden brown.

4 Pour the mixture into thecold tray from the freezer

What happens to sugar when it is put into cold water and stirred?

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

1 mark

(b) What happens to some of the water when the mixture is heated?

..............................................................................................................……1 mark




(c) The mixture becomes very hot.

Tick ONE box to show what Adrian should measure to find out how hot themixture is.

weight temperature

volume time

1 mark

(d) Adrian carefully stirs the hot mixture with a wooden spoon.

The handle of the wooden spoon stays cool.

Tick ONE box to explain why the handle of the wooden spoon stays cool.

Wood cannot get hot.

Wood is a poor conductor of heat.

Wood is a hard material.

Wood is a poor insulator of heat.

1 mark

(e) Adrian takes the tray out of the freezer. He pours the runny mixture into the metaltray. He leaves the tray on a table for 10 minutes.

The mixture becomes solid.

Why does the runny mixture become solid?

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

1 mark




7. Solids, liquids and gases

(a) Lorna has a bottle of nail varnish.

Write solid, liquid or gas to label each part of the diagram.

1 mark

(b) Lorna stands at the front of the classroom.She takes the lid off the nail varnish bottle.

The table below shows the time it took for the smell of the varnish to reachdifferent children.

ChildTime taken to smell

varnish (seconds)A 20

B 5

C 12

Complete the diagram below by writing A, B or C on each line to show theposition of each child.

Lorna with

nail varnish …………… …………… ……………1 mark




(c) Water can be a solid, a liquid or a gas.

Draw THREE lines to match the name given to water when it is a solid, a liquidand a gas.

ice

water

water vapour

solid

liquid

gas

1 mark

(d) Answer the questions in the table by ticking the correct box in each row.

Question Solid Liquid Gas

Which forms duringevaporation?

Which keeps its own

shape?Which forms duringcondensation?

Which spreads out to fillany sized container?

2 marks




8. In the kitchen

(a) Layla collects different objects from the kitchen.

foil

plasticfood wrap

glass

rollingpin

candle

She looks at some of the properties of the materials these objects are made from.

Write a or in each empty box in the table to show the properties of thematerials.

Material/Object Flexible Hard Transparent

aluminium foil

wax candle

wooden rolling pin

plastic food wrap

glass1 mark

(b) Aluminium foil is flexible.

Give ONE use of aluminium foil in the kitchen where it is important that the foilis flexible.

.....................................................................................................................1 mark




(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 withbicarbonate 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 inthe box below.

water vapour condensation steam smoke

window

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

1 mark




(ii) Why does the level of the water inside the saucepan go down if the watercontinues to boil?

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

1 mark

Level 5

9. Ice experiments

(a) Safia and Josh are doing experiments with ice cubes.

First Safia puts ice cubes on a plate over a bowl of hot water.

ice

bowl

hot water

water droplets

plate

After some time, Safia sees droplets of water drip from underneath the plate.Water from the melting ice cannot pass through the plate and the bowl hasnot moved.

Explain how the water droplets formed in the bowl underneath the plate.

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

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

.....................................................................................................................2 marks




(b) In winter, people put salt on the road to make the ice melt.

Josh investigates the effect of salt on melting ice.

He puts the same amount of ice in two funnels.

He adds salt to the ice in one funnel.

cm3

20

18

16

14

12

10

8

6

4

2

Ice only

cm3

20

18

16

14

12

10

8

6

4

2

Ice and salt

The ice starts to melt. Every ten minutes, Josh measures how much water is ineach cylinder.

The graph below gives Josh’s results.

One axis on the graph has been labelled.

Write the label and the units for the other axis.

volume of water (cm )3...........................................

14

12

10

8

6

4

2

00 10 20 30 40 50 60 70 80 90 100

with salt

without salt

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

( )

1 mark




(c) What has Josh found out about the effect of salt on melting ice?

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

..................................................................................................................... 1 mark

(d) Josh concludes ‘The more salt I add, the steeper the line on the graph will be’.Josh’s results on the graph do not support his conclusion.

Tick ONE box to show why his results do not support his conclusion.

The line on the graphdid not get steeper.

He used the sameamount of ice each time.

He did not try differentamounts of salt.

He only measured thewater every ten minutes.

1 mark

10. Washing day

(a) Some children have washed a jumper.

Why does the jumper feel heavier after it is washed?

......................................................................................................................1 mark




(b) The children want to find out how long the jumper takes to dry.

They hang the jumper up to dry.

Name the process that completely dries the jumper.

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

1 mark

(c) The children weigh the jumper every hour.

They make a graph of their results.

How many hours did the jumper take to dry?

.....................................................…hours1 mark




(d) The children repeat their test the next day. They wash and dry the same jumper inthe same way. The jumper dries more quickly.

Give ONE possible reason why the jumper dries more quickly when they repeattheir test.

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

1 mark

11. Melting ice

(a) It is cold and there is snow and ice on the pavement.

What word describes the change of water into ice?

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

1 mark




(b) Ben and Sakra want to find a way to make the ice melt quickly so the pavement issafe to walk on.

Ben measures the temperature of some ice cubes.The temperature is – 4ºC.

Mark – 4ºC on the thermometer.

1 mark

(c) Sakra puts three ice cubes on three separate dishes. She leaves one uncovered,she covers one with a tablespoon of salt and one with a tablespoon of flour.

Ben and Sakra record how long it takes each ice cube to melt.

Test A B C

Description

Time for icecube to melt

(minutes)100 40 130




Sakra and Ben draw a graph of their results.

Complete the labels by writing A, B or C under each bar on the graph below toname which test each bar shows.

1 mark

(d) Ben says that flour seems to make the ice melt more slowly.

Tick ONE box to show a possible reason for flour making ice melt more slowly.

Flour lets heat passthrough quickly.

Flour dissolves ice.

Flour is at a lowertemperature than ice. Flour insulates ice.

1 mark



12. The water cycle

(a) This picture shows part of the water cycle.

stream

river

sea

Tick ONE box to say what the arrow shows.

cold water rising water vapour condensing

water evaporating gas changing to liquid

1 mark

(b) Tick ONE box in each row to show if each sentence is true or false.

Clouds form ...

True False

from water produced by condensation.

from water vapour in the air.

1 mark

(c) In the water cycle, water from the sea becomes rain water.

Why is rain water not salty when it comes from salty sea water?

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

......................................................................................................................1 mark

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5D Changing State Questions PDF