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This document has 20 pages. Blank pages are indicated. IB20 10_0846_02/5RP © UCLES 2020 [Turn ove r  Cambridge Primary Checkpoint SCIENCE 0846/02 Paper 2 October 2020 45 minutes You must answer on the question paper. No additional materials are needed. INSTRUCTIONS • Answer all questions. • Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs. • Write your name, centre number and candidate number in the boxes at the top of the page. • Write your answer to each question in the space provided. • Do not use an erasable pen or correction fluid. • Do not write on any bar codes. • You should show all your working in the booklet. • You may use a calculator. INFORMATION • The total mark for this paper is 50. • The number of marks for each question or part question is shown in brackets [ ].

2 © UCLES 2020 0846/02/O/N/20 1 (a) The picture shows a plant. ......................................... ......................................... ......................................... ......................................... Complete the four labels on the diagram. [1] (b) Complete the sentence. Water is taken in through the and transported through the . [2]

3 © UCLES 2020 0846/02/O/N/20 [Turn over 2 The table shows information about two substances. substance property does it dissolve in water? does it dissolve in ethanol? salt yes no sugar yes yes Blessy wants to separate a mixture of salt and sugar. (a) She tries to use a magnet to separate the substances. This does not work. Explain why using a magnet does not work. [1] (b) Blessy adds water to some of the mixture. She stirs the mixture and then filters it. Explain why this does not separate the mixture of salt and sugar. [1] (c) Blessy separates the remaining mixture of salt and sugar. Describe what she does. [2]

4 © UCLES 2020 0846/02/O/N/20 3 Carlos investigates forces. (a) Which apparatus does he use to measure force? [1] (b) He writes his results in a table. type of force force pull 4.8 push 6.1 twist 5.3 Carlos has not put the unit for force in the table. What is the unit for force? [1]

5 © UCLES 2020 0846/02/O/N/20 [Turn over 4 Hassan has smart glass in his windows. He can switch the smart glass on and off. smart glass switched onsmart glass switched off Describe what happens to the smart glass in the two pictures. When the smart glass is switched on Hassan can see through it because it is . When the smart glass is switched off Hassan cannot see through it because it is . [2]

6 © UCLES 2020 0846/02/O/N/20 5 Chen and Aiko investigate how seeds germinate. in the fridge pot seed soil in a warm classroom (a) Give one reason why this is a fair test. [1] (b) Here are the results for the pot in the warm classroom. day number of seedlings in the warm classroom pot 1 0 2 1 3 2 4 4 Draw a line graph of the results. Label the y-axis. 0 123 day ..................................... 4 1 2 3 4 5 6 ..................................... 5 [3]

7 © UCLES 2020 0846/02/O/N/20 [Turn over (c) Here are the results for both pots. Complete the table to predict the number of seedlings on day 5. day number of seedlings in the warm classroom pot number of seedlings in the fridge pot 1 0 0 2 1 0 3 2 1 4 4 2 5 [2] (d) Use Chen and Aiko’s results to write a conclusion for their investigation. [1]

8 © UCLES 2020 0846/02/O/N/20 6 Different materials have different properties. Look at the table. It shows some properties of six materials. material hardness (1 = soft and 10 = hard) melting point (1 = low and 10 = high) solubility in water strength (1 = weak and 10 = strong) A 9 10 soluble 9 B 4 10 insoluble 1 C 3 9 insoluble 10 D 10 10 insoluble 10 E 4 4 insoluble 6 F 9 9 insoluble 9 (a) Which material in the table dissolves in water? [1] (b) It is not possible to tell which of material C or material D is the stronger. Explain why. [1] (c) Mike sorts the materials into two groups. Group 1 – materials A, D and F Group 2 – materials B, C and E Which property did Mike use to sort the materials? [1]

9 © UCLES 2020 0846/02/O/N/20 [Turn over 7 Pierre has five pictures showing him running. E D C B A He draws arrows on the pictures. (a) Which picture shows the direction of the force of gravity? Circle the correct answer. A B C D E [1] (b) Air resistance slows him down. Which picture shows the direction of air resistance? Circle the correct answer. A B C D E [1]

10 © UCLES 2020 0846/02/O/N/20 8 Oliver investigates what happens to materials when they are heated. Here are his results. material before heating after heating A silver solid white solid B green solid black solid C colourless liquid gas D white solid white solid E white solid colourless liquid (a) Which material does not change when Oliver heats it? [1] (b) Which material boils when Oliver heats it? [1] (c) Which material melts when Oliver heats it? [1]

11 © UCLES 2020 0846/02/O/N/20 [Turn over 9 An electromagnet attracts magnetic objects. Look at the picture of an electromagnet. + − Which objects does the electromagnet attract? Tick () the correct objects. aluminium spoonobject copper wire iron key plastic toy steel nail wooden ruler [2]

12 © UCLES 2020 0846/02/O/N/20 10 Lily counts the number of different organs in a human body. How many lungs do humans have? How many kidneys do humans have? How many livers do humans have? How many stomachs do humans have? [1] 11 This question is about forces. Decide if each statement is true or false. Tick () the correct box. [2] true false forces make objects change speed friction is a force pitch is a force weight is a force

13 © UCLES 2020 0846/02/O/N/20 [Turn over 12 Safia makes a musical instrument. She pulls a rubber balloon over the top of a cup. Safia pinches the rubber balloon rubber balloon cup Safia pinches the rubber balloon with her fingers and then lets the rubber go. A sound is made. (a) Why does the rubber balloon make a sound? [1] (b) Describe how Safia can increase the volume of the sound. [1] (c) Describe how Safia can increase the pitch of the sound. [1]

14 © UCLES 2020 0846/02/O/N/20 13 The diagram shows a feeding relationship between three living organisms. corn mouse owl (a) What is the name of this type of diagram? [1] (b) Describe the feeding relationship between these three organisms. [1] (c) Corn is the producer in this relationship. Explain why. [1]

15 © UCLES 2020 0846/02/O/N/20 [Turn over (d) Owls are predators. Name one feature owls have which makes them good predators. Explain how this feature is useful. feature explanation [2] 14 Mia connects an electrical circuit. switch lampswire cell She closes the switch. The lamps are very bright. Mia adds two more lamps to the electrical circuit. Describe what happens. [1]

16 © UCLES 2020 0846/02/O/N/20 15 The table shows some boiling points of substances. substance boiling point in °C A 15 B 1095 C 100 D 0 E 444 (a) What is the meaning of the term boiling point? [2] (b) Which substance could be water? Explain why. [2]

17 © UCLES 2020 0846/02/O/N/20 [Turn over 16 The teacher of class 5 uses a model to show part of the solar system. ball C ball B ball A Ball A is the Moon. It moves around ball B. (a) Name ball B and ball C. ball B ball C [1] (b) Describe how the teacher moves ball B and ball C. [2]

18 © UCLES 2020 0846/02/O/N/20 17 Yuri draws his name on a piece of paper. (a) He looks at his name in a mirror. Yu r i mirro r Tick () the box next to the image Yuri sees in the mirror. Yu r i Yu r i Yu r i iruY [1] (b) Complete these sentences about mirrors. Rays of light from the object are by the mirror. We can see the image because the rays of light . [2]

19 © UCLES 2020 0846/02/O/N/20 BLANK PAGE

20 Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge Assessment International Education Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at www.cambridgeinternational.org after the live examination series. Cambridge Assessment International Education is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of the University of Cambridge Local Examinations Syndicate (UCLES), which itself is a department of the University of Cambridge. © UCLES 2020 0846/02/O/N/20 BLANK PAGE