Download [PDF] April 2020 CAIE P2 Questions 1113 Science Cambridge Lower Secondary Checkpoint

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This document has 20 pages. Blank pages are indicated. IB20 05_1113_02/3RP © UCLES 2020 [Turn ove r   Cambridge Lower Secondary Checkpoint SCIENCE 1113/02 Paper 2 April 2020 45 minutes You must answer on the question paper. No additional materials are required. 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 1113/02/A/M/20 1 A farmer breeds goats for their milk. (a) The farmer uses selective breeding. These are the steps he uses. They are in the wrong order. A He breeds the female goat with a male goat. B He repeats the steps for several generations. C He chooses a female goat that produces a lot of milk. D He breeds the female offspring with a male goat. E He chooses a female offspring that also produces a lot of milk. Put the steps in the correct order. One has been done for you. E [2] (b) The characteristic the farmer chooses in his female goats is producing lots of milk. Suggest one other characteristic the farmer wants in his goats. [1]

3 © UCLES 2020 1113/02/A/M/20 [Turn over (c) Natural selection is the way new varieties of animals form in the wild. Which scientist developed the idea of natural selection? Circle the correct answer. Copernicus Darwin Galileo Pasteur Rutherford [1]

4 © UCLES 2020 1113/02/A/M/20 2 Aiko wants to increase the rate of reaction between sodium carbonate and dilute nitric acid. (a) Match the way that she can do this to why it works. Draw only two straight lines. way why it works more crowded particles so more collisions increase the temperature of nitric acid particles have less energy so more collisions particles move faster so more collisions increase the concentration of nitric acid has bigger particles so that there are more collisions [2] (b) Lumps of sodium carbonate react more slowly with dilute nitric acid than powdered sodium carbonate. Use ideas about collisions to explain why. [2]

5 © UCLES 2020 1113/02/A/M/20 [Turn over 3 Chen and Yuri draw a distance / time graph for their journeys. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 11 0 100 90 80 70 60 50 40 30 20 10 0 time in seconds distance in metresChen Yu r i 120 Use the distance / time graph to answer the questions. (a) How many metres did Chen move in the first 8 seconds? m [1] (b) How many seconds did Yuri stop moving during his journey? s [1] (c) Average speed can be calculated from the graph. (i) Complete the equation for average speed. average speed = [1] (ii) Calculate Yuri’s average speed during the whole journey. Yuri’s average speed m / s [2]

6 © UCLES 2020 1113/02/A/M/20 4 (a) Look at the picture of a camel. Camels live in hot dry deserts. They have many adaptations to help them survive. Complete the table to explain how a camel’s adaptations help it survive. The first one has been done for you. adaptation explanation fat in hump only so that the rest of the body has less insulation large flat feet …………………………………………………………. thick eyelashes …………………………………………………………. does not produce sweat …………………………………………………………. [3] (b) Animals that live in the cold have different adaptations. Suggest two adaptations that help animals survive in the cold. 1 2 [2]

7 © UCLES 2020 1113/02/A/M/20 [Turn over 5 Mike makes a salt called magnesium sulfate. He adds magnesium to dilute sulfuric acid. magnesium ribbon dilute sulfuric acid o o o o He keeps adding magnesium to the dilute sulfuric acid until no more hydrogen gas is given off. Some unreacted magnesium is left in the magnesium sulfate solution. (a) Describe how Mike separates the unreacted magnesium from the magnesium sulfate solution. [1] (b) Describe how Mike makes a dry sample of magnesium sulfate from magnesium sulfate solution. [1] (c) Write a word equation for the reaction between magnesium and sulfuric acid. + + [2]

8 © UCLES 2020 1113/02/A/M/20 6 Lily and Angelique use the internet to find this information about evaporation. rate of evaporation energy of molecules rate of evaporation air pressure Evaporation can happen when liquids are hot or cold. Evaporation is related to the energy of molecules. The rate of evaporation can change. (a) What happens to the rate of evaporation when the air pressure increases? [1] (b) (i) What happens to the rate of evaporation when the energy of molecules increases? [1] (ii) Write down one way the energy of molecules could be increased. [1]

9 © UCLES 2020 1113/02/A/M/20 [Turn over 7 Water and minerals move through flowering plants. (a) Complete the sentences about how water and minerals move through a plant. Choose parts of a plant from the list. Each part can be used once, more than once or not at all. palisade mesophyll phloem root hair xylem Water and minerals enter plants through the cells. The water and mineral solution is transported in the stems through cells. The solution reaches the cells in the leaves and is used for growth. [3] (b) Plants need water to make sugar. Name two other things that plants need to make sugar. and [2]

10 © UCLES 2020 1113/02/A/M/20 8 The diagram shows different types of rocks and how they form. volcanic eruption igneous rock sediment sedimentary rockrock X magma (a) Sedimentary rocks can be turned into rock X by heat and pressure. What type of rock is X? [1] (b) Which layer of the Earth contains magma? Circle the correct answer. atmosphere inner core mantle outer core [1] (c) Sedimentary rocks often contain the remains of dead animals and plants from millions of years ago. What word is used to describe these remains? [1]

11 © UCLES 2020 1113/02/A/M/20 [Turn over (d) Different types of soil have different amounts of organic matter in them. Which type of soil contains the most organic matter? Circle the correct answer. clay loam sandy silt [1]

12 © UCLES 2020 1113/02/A/M/20 9 Sound can be reflected in the same way as light. Safia and Yuri investigate the relationship between the angle of incidence, x, and the angle of reflection, y. They use the apparatus in the diagram. 12 11 10 9 8 7 6543 2 1 board boardxy tube B tube A ticking clock sound meter Yuri  puts the ticking clock next to tube A  puts the sound meter next to tube B  uses the same value for angle x  uses different values of angle y. Safia writes down the sound level shown on the sound meter. Complete the table about the variables. variable to change 1. ………………………….……………....... variables to control 1. value for x 2. ………………………….……………....... 3. ………………………….……………....... variable to measure 1. ………………………….……………....... [4]

13 © UCLES 2020 1113/02/A/M/20 [Turn over 10 Look at the diagrams of cells. cheek cellnerve cell red blood cells (a) Describe one way the structure of a nerve cell is different to a cheek cell. [1] (b) The structure of a red blood cell is adapted for its function. Explain how. function adaptation [2]

14 © UCLES 2020 1113/02/A/M/20 11 Mia investigates the temperature change during some reactions. In each experiment Mia adds a solid to a liquid. She measures the temperature of the liquid before and after adding the solid. (a) Mia uses a measuring cylinder to measure the volume of liquid. The diagram shows part of her measuring cylinder of liquid. 1 2 3 4cm 3 What is the volume of liquid in the measuring cylinder? cm 3 [1]

15 © UCLES 2020 1113/02/A/M/20 [Turn over (b) Here are Mia’s results. liquid added temperature of liquid solid(s) added temperature of the liquid after solid is added change in temperature is the reaction exothermic or endothermic? water 17 copper sulfate 20 +3 …………. water 17 citric acid and sodium hydrogencarbonate 14 …………. …………. copper sulfate solution 18 zinc 22 …………. …………. (i) She does not include some important information in the headings of the table. Which unit is missing from the headings? [1] (ii) Calculate the change in temperature for each experiment. One has been done for you. Write your answers in the table. [1] (iii) Complete the table by writing endothermic or exothermic in the last column. [1]

16 © UCLES 2020 1113/02/A/M/20 12 Some objects become electrically charged. (a) Oliver draws a diagram of two charged objects. – – – – – – – – – + + + + + + + + + plastic rod cloth Explain how the objects become charged. [2] (b) Complete the sentences. Opposite charges . Like charges . [1]

17 © UCLES 2020 1113/02/A/M/20 (c) Oliver puts charged balloons next to each other. ABCD Balloon A has a positive charge. What are the charges on the other balloons? A is positive. B is . C is . D is . [1] 13 Diagrams are used to show how energy is transferred. Lamps transfer energy. electrical energy = 100 J ...................energy = 10 J thermal energy = 90 J Complete the diagram to show the type of energy that is 10 J. [1]

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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 1113/02/A/M/20 BLANK PAGE