Science Test Revision

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1 John Buchan Middle School Science Test Revision 5D Changing State 52 min 50 marks Name John Buchan Middle School 1

2 Level 3 1. Changes (a) Kim and Juan change the way some things look. The pictures below show the changes. Which changes are reversible? Tick ONE box for each change. Is this change reversible? Yes No Bread Toast Ice Water Paper Ash Plasticine Plasticine snail 2 marks John Buchan Middle School 2

3 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 Mass of sponge (g) Time (hours) What is the mass of the wet sponge at the start of the investigation?... g 5 John Buchan Middle School 3

4 (b) Describe how the mass of the wet sponge changes over the first four hours.... (c) What process causes the mass of the drying sponge to change?... (d) What is the mass of the dry sponge?... g (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 dried most quickly in the first two hours. Bob Ruth The sponge was still drying after five hours. Komal There was 20g of water in the sponge at the start. John Buchan Middle School 4

5 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?...hours John Buchan Middle School 5

6 (b) Peter took photographs of the sweet in the beaker at the beginning and the end of his investigation. What part of his plan did Peter change when he carried out the investigation? (c) Look at the photographs A and B. Use the evidence in photographs A and B to write a conclusion for Peter s investigation John Buchan Middle School 6

7 (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 4. Keeping cool (a) Jamal is thinking about how to keep ice cubes from changing into water on a hot day. Jamal says I think if you put the ice cubes inside lots of plastic bags they will stay frozen for longer. Tick ONE box to show what sort of statement Jamal has made. an observation a prediction a conclusion a measurement John Buchan Middle School 7

8 (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.... (c) Jamal records his results in a table. Number of plastic bags Time for ice to change to water (minutes) Choose ONE word from the box below to complete the sentence about the plastic bags. dissolved condensed heated insulated evaporated The table shows that the ice is... by the plastic bags so that the ice changes to water more slowly. John Buchan Middle School 8

9 (d) Tick ONE box to show the temperature of water when it changes to ice. 10 C 0 C 10 C 100 C 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 evaporation condensation Is the change reversible? (b) This diagram shows the water cycle. Water changes to vapour Water vapour cools 2 3 and rises into the air. and forms clouds. 1 rivers and seas. Rain falls to the ground. 4 John Buchan Middle School 9

10 In which stage of the water cycle above does condensation occur? Tick ONE box (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?... John Buchan Middle School 10

11 6. Toffee (a) Adrian and his dad are cooking toffee. The pictures below show how they make the toffee. 1. Put a metal tray into a freezer for an hour. 2. Stir sugar into some cold water. 3 Heat the mixture until it turns golden brown. 4 Pour the mixture into the cold tray from the freezer What happens to sugar when it is put into cold water and stirred?... (b) What happens to some of the water when the mixture is heated?... John Buchan Middle School 11

12 (c) The mixture becomes very hot. Tick ONE box to show what Adrian should measure to find out how hot the mixture is. weight temperature volume time (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. (e) Adrian takes the tray out of the freezer. He pours the runny mixture into the metal tray. He leaves the tray on a table for 10 minutes. The mixture becomes solid. Why does the runny mixture become solid?... John Buchan Middle School 12

13 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. (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 reach different children. Child Time 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 the position of each child. Lorna with nail varnish John Buchan Middle School 13

14 (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 liquid and a gas. ice solid water liquid water vapour gas (d) Answer the questions in the table by ticking the correct box in each row. Question Solid Liquid Gas Which forms during evaporation? Which keeps its own shape? Which forms during condensation? Which spreads out to fill any sized container? 2 marks John Buchan Middle School 14

15 8. 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 in each empty box in the table to show the properties of the materials. Material/Object Flexible Hard Transparent aluminium foil wax candle wooden rolling pin plastic food wrap glass (b) Aluminium foil is flexible. Give ONE use of aluminium foil in the kitchen where it is important that the foil is flexible.... John Buchan Middle School 15

16 (c) Layla knows some changes are reversible. Tick THREE boxes to show which changes are reversible. cooling water cooking bread boiling an egg mixing vinegar with bicarbonate of soda freezing water into ice 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... John Buchan Middle School 16

17 (ii) Why does the level of the water inside the saucepan go down if the water continues to boil?... 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. plate ice water droplets bowl hot water 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 has not moved. Explain how the water droplets formed in the bowl underneath the plate marks John Buchan Middle School 17

18 (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. Ice only Ice and salt cm cm The ice starts to melt. Every ten minutes, Josh measures how much water is in each 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 with salt volume of water (cm 3... ) without salt ( ) John Buchan Middle School 18

19 (c) What has Josh found out about the effect of salt on melting ice? (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 graph did not get steeper. He did not try different amounts of salt. He used the same amount of ice each time. He only measured the water every ten minutes. 10. Washing day (a) Some children have washed a jumper. Why does the jumper feel heavier after it is washed?... John Buchan Middle School 19

20 (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.... (c) The children weigh the jumper every hour. They make a graph of their results. How many hours did the jumper take to dry?... hours John Buchan Middle School 20

21 (d) The children repeat their test the next day. They wash and dry the same jumper in the same way. The jumper dries more quickly. Give ONE possible reason why the jumper dries more quickly when they repeat their test Melting ice (a) It is cold and there is snow and ice on the pavement. What word describes the change of water into ice?... John Buchan Middle School 21

22 (b) Ben and Sakra want to find a way to make the ice melt quickly so the pavement is safe to walk on. Ben measures the temperature of some ice cubes. The temperature is 4ºC. Mark 4ºC on the thermometer. (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 ice cube to melt (minutes) John Buchan Middle School 22

23 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 to name which test each bar shows. (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 pass through quickly. Flour is at a lower temperature than ice. Flour dissolves ice. Flour insulates ice. John Buchan Middle School 23

24 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 (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. (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? John Buchan Middle School 24

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