[PDF] Cambridge Secondary Checkpoint - Science (1113) October 2018 Paper 2 Question.pdf | Plain Text

This document consists of 17 printed pages and 3 blank pages. IB18 10_1113_02/4RP © UCLES 2018 [Turn over   Cambridge International Examinations Cambridge Secondary 1 Checkpoint SCIENCE 1113/02 Paper 2 October 2018 45 minutes Candidates answer on the Question Paper. Additional Materials: Pen Calculator Pencil Ruler READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. You should show all your working in the booklet. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. The total number of marks for this paper is 50.

2 © UCLES 2018 1113/02/O/N/18 1 Draw a straight line from each function to the correct plant cell. Draw only two lines. [2] function plant cell transports water and minerals absorbs water and minerals from soil

3 © UCLES 2018 1113/02/O/N/18 [Turn over 2 Reactions between metals and non-metals form compounds. (a) Sulfur reacts with metals to form a type of compound called a sulfide. Complete the table to show the type of compound formed by different non-metals. One has been done for you. non-metal type of compound chlorine oxygen sulfur sulfide [2] (b) Iron reacts with a compound and oxygen to form rust. What is the name of this compound? [1] 3 Gabriella connects an electrical circuit. A1 A4 A2 A3 There are two lamps and four ammeters in the circuit. The lamps are identical. The reading on A 1 is 0.8 A. What are the readings on the other ammeters? A 2 is A. A 3 is A. A4 is A. [2]

4 © UCLES 2018 1113/02/O/N/18 4 The diagram shows a frog. Scientists classify animals with backbones into five main vertebrate groups. Classify the frog into its correct vertebrate group. Give one reason for your answer. vertebrate group reason [2]

5 © UCLES 2018 1113/02/O/N/18 [Turn over 5 Rajiv draws pictures of the stars in the night sky from his bedroom window. He draws a picture in January. He draws a picture in June. (a) Write down one difference between the two pictures. [1] (b) Rajiv draws another picture in January of the next year. Describe what the picture will look like. [1]

6 © UCLES 2018 1113/02/O/N/18 6 (a) (i) Name the process that plants use to make their own food. [1] (ii) Name one other product of this process. [1] (b) In an investigation, identical plants are placed in three different gases.  Each plant is given constant light.  The plants are kept in the same conditions for one week. The diagram shows the results of this investigation. gas Agas Bgas C gas Agas Bgas C at start after one week

7 © UCLES 2018 1113/02/O/N/18 [Turn over Describe the results of this investigation. plant kept in gas A plant kept in gas B plant kept in gas C [3]

8 © UCLES 2018 1113/02/O/N/18 7 Carlos investigates the reaction of zinc with dilute sulfuric acid. He puts zinc into a conical flask and then adds 25 cm 3 of cold dilute sulfuric acid. The diagram shows his apparatus. gas syringe zinc dilute sulfuric acid 10 20 30 40 50 60 70 80 90 100 Carlos then records the volume of gas in the syringe each minute. The diagrams below show some of his results. 2 minutes 1 minute 6 minutes 4 minutes 10 20 30 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 (a) Write down the volume of gas collected after 6 minutes. cm 3 [1] (b) Carlos repeats the investigation using 25 cm 3 of warm dilute sulfuric acid. Predict the volume of gas collected after 2 minutes. cm 3 [1]

9 © UCLES 2018 1113/02/O/N/18 [Turn over (c) Carlos then repeats the investigation using 25 cm 3 of more concentrated sulfuric acid. Explain why the reaction is faster. Use ideas about particles and collisions in your answer. [2] 8 Yuri draws a picture to show the air particles in front of a loudspeaker. air particles loudspeaker Write the letter C on the diagram where there is a compression of air particles. Write the letter R on the diagram where there is a rarefaction of air particles. [2]

10 © UCLES 2018 1113/02/O/N/18 9 The picture shows a mountaineer climbing Mount Everest. Mount Everest is nearly 9 km high. The air pressure at the top of the mountain is very low. This makes breathing very difficult. The mountaineer wears a tight fitting mask connected to a breathing apparatus. A chemical in the breathing apparatus removes waste gas from his breath. (a) Name the life process which provides the mountaineer with the energy for climbing. [1] (b) Which gas, found in the air, is needed for this process? [1] (c) Which waste gas needs to be removed from the mountaineer’s breath? [1] (d) Suggest why low air pressure at the top of mountains makes breathing more difficult. [2]

11 © UCLES 2018 1113/02/O/N/18 [Turn over 10 Youssef and Blessy investigate the reaction of metals with dilute hydrochloric acid. They put 10 cm 3 of hydrochloric acid into four test -tubes. They then add 0.1g of a different metal to each test -tube. Youssef and Blessy measure the time it takes for the metal to react completely. This is the reaction time. The table shows their results. metal reaction time in s calcium 15 iron 290 magnesium 23 zinc 230 (a) Put the metals in the table in order of reactivity. most reactive least reactive [1] (b) Write the word equation for the reaction between magnesium and hydrochloric acid. ++ [3] (c) Youssef and Blessy wear safety glasses during the investigation. Explain why. [1]

12 © UCLES 2018 1113/02/O/N/18 11 White light can be split into different colours by a glass prism. white light glass prism (a) Write down the name given to this splitting of white light. [1] (b) The white light is split into seven different colours. Complete the order of the seven colours. red yellow blue violet [2]

13 © UCLES 2018 1113/02/O/N/18 [Turn over 12 Substances are either elements, compounds or mixtures. (a) Look at the list of substances. carbon copper magnesium carbonate sulfur water Sort the substances into compounds and elements. One has been done for you. compound element carbon [2] (b) Read these sentences about mixtures. Tick () the box next to the correct sentence. Mixtures are pure substances. Mixtures can be separated by physical means. Mixtures contain only elements. Elements in mixtures are joined by chemical bonds. [1] (c) Magnesium carbonate reacts with an acid to make magnesium nitrate. Which acid must be used in this reaction? [1]

14 © UCLES 2018 1113/02/O/N/18 13 Chen draws a diagram to show water changing from a liquid to water vapour. water moleculeswater vapou r liquid Complete the sentences. All the water molecules in the liquid are moving. Some of the molecules have more .................................................... . These molecules move ...................................................... enough to escape the surface of the liquid. This is called .................................................. . This makes the liquid become .................................... . [4]

15 © UCLES 2018 1113/02/O/N/18 [Turn over 14 The diagram shows a model of the human heart. (a) Complete the table about the composition of the blood going to the lungs. Tick () the two boxes that describe the correct composition of this blood. concentration of carbon dioxide concentration of oxygen high low high low [1] (b) The blood vessel labelled X carries blood away from the heart. (i) What name is given to this type of blood vessel? [1] (ii) The blood vessel labelled X has very thick walls. Explain why this is necessary. [1] X blood from body blood to lungs

16 © UCLES 2018 1113/02/O/N/18 15 Blessy draws five different distance/time graphs on the same axes. distanceA B C D E time from Blessy (a) The distance axis shows how far an object is away from Blessy. Which graph shows an object moving towards Blessy? Circle the correct answer. A B C D E [1] (b) Describe what is happening to the speed of object B. [1]

17 © UCLES 2018 1113/02/O/N/18 16 Lily draws a diagram to explain the principle of moments. d1 d2 F1 F2 Use the diagram to explain the principle of moments. [2]

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