[PDF] Cambridge Lower Secondary Progression Test - Science 2018 Stage 8 - Paper 2 Question.pdf | Plain Text

SCIENCE_S8_02_8RP © UCLES 2018 *7631031431* Cambridge Lower Secondary Progression Test Science paper 2 Stage 8 45 minutes Name ………………………………………………….………………………. Additional materials: Calculator Ruler READ THESE INSTRUCTIONS FIRST Answer all questions in the spaces provided on the question paper. You should show all your working on the question paper. 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. For Teacher’s Use Page Mark 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Total

2 S/S8/02 © UCLES 2018 For Teacher’s Use 1 Foods contain a mixture of different constituents. The table shows the masses of different constituents and the energy content in 100 g of some foods. foodmass of carbohydrate in gmass of fat in gmass of vitamin C in mgenergy content in kJ bread 47 3 0 1030 butter 0 81 0 3010 raw potato 18 0 20 340 (a) The masses of the constituents in each food do not add up to 100 g. Name one other constituent present in each of the foods. ...................................................................................................................................... [1] (b) Use the information from the table to answer these questions. (i) Which constituent in butter provides the most energy? ..............................................................................................................................[1] (ii) Which constituent in bread provides the most energy? ..............................................................................................................................[1] (c) Cooked potato contains much less vitamin C than raw potato. Suggest why. ...................................................................................................................................... [1]

3 S/S8/02 © UCLES 2018 [Turn over For Teacher’s Use 2 Mia investigates shadows. She puts a piece of card between a flashlight and a screen. flashlightcardscreen A B C D E (torch) A shadow forms on the screen. Which answer shows the size of the shadow? Circle the correct answer. A to B A to C A to E B to C B to D [1]

4 S/S8/02 © UCLES 2018 For Teacher’s Use 3 Blessy does an experiment with light. She uses a single incident light ray and a curved glass block. single incident light ray in aircurved glass block What is happening to the ray of light as it goes from the air into the glass block? ................................................................................................................................................. ................................................................................................................................................. Why does this happen? ................................................................................................................................................. ................................................................................................................................................. [2] 4 Priya notices that the pressure inside one of her car tyres is too low. She pumps up the tyre to a higher pressure. (a) What happens to the number of particles in the car tyre? ...................................................................................................................................... [1] (b) What happens to the distance between particles as the pressure increases? ...................................................................................................................................... [1] (c) One of the tyres gets a puncture (small hole). What happens to the pressure inside the tyre? ...................................................................................................................................... [1]

5 S/S8/02 © UCLES 2018 [Turn over For Teacher’s Use 5 Class 8 have a quiz about sound. Their teacher gives them six sentences. Decide if each sentence is true or false. Write your answers on the dotted lines. Sound Quiz 1 Sound causes air particles to vibrate. ................................................. 2 The bigger the vibrations of the air particles the quieter the sound. ................................................. 3 Sound waves can move through air, water and a vacuum. ................................................. 4 When there is no sound the particles stop moving. ................................................. 5 A high pitched sound is always loud. ................................................. 6 Air particles are closer together in a compression than a rarefaction. ................................................. [3]

6 S/S8/02 © UCLES 2018 For Teacher’s Use 6 Chen investigates rusting. • He puts distilled water into four beakers. • He adds different amounts of salt to three of the beakers. • He puts one iron nail into each beaker. iron nail with no salt iron nail with 1 g of salt iron nail with 2 g of salt iron nail with 3 g of salt After one week Chen records his observations. amount of salt added in gobservation 0small amount of rust 1most of the nail in the water is rusty 2all of the nail in the water is rusty 3all of the nail in the water is very rusty (a) (i) Which variable is Chen changing in his investigation? ..............................................................................................................................[1] (ii) Write down one variable Chen needs to control. ..............................................................................................................................[1] (iii) What conclusion can Chen make from his investigation? .................................................................................................................................. ..............................................................................................................................[1]

7 S/S8/02 © UCLES 2018 [Turn over For Teacher’s Use (b) (i) Which element dissolved in the water reacts with iron during rusting? ..............................................................................................................................[1] (ii) Chen sets up another beaker. This time he puts the iron nail in without any water. He then seals the top of the beaker. Explain why the iron nail in this beaker does not rust. .................................................................................................................................. ..............................................................................................................................[1]

8 S/S8/02 © UCLES 2018 For Teacher’s Use 7 A scientist called Frederick Gowland Hopkins studied the growth of newborn rats. He used two groups of rats, group A and group B. • Group A rats were fed on a simple diet with milk. • Group B rats were fed on a simple diet without milk. After 18 days he changed the diets so only group B got the milk. The results of this experiment are shown in the graph. 0 40 60 80 25 18 time in days body mass in grams 50 group B group A day 18 simple diet without milk simple diet with milk Key Describe the patterns shown by the graph between (a) day 0 to day 18 group A ............................................................................................................................ group B ............................................................................................................................ [2] (b) day 18 to day 50 group A ............................................................................................................................ group B ............................................................................................................................ [2]

9 S/S8/02 © UCLES 2018 [Turn over For Teacher’s Use 8 Youssef and Safia investigate light rays. They • use a single incident ray and a curved glass block • measure angle A • measure angle B. AB curved glass block single incident light ray in air (a) What equipment do they use to measure angle A? ...................................................................................................................................... [1] (b) They repeat the experiment to get six sets of readings. Draw a results table to record all the measurements they make. [2]

10 S/S8/02 © UCLES 2018 For Teacher’s Use 9 Mike investigates how light affects photosynthesis. Here is the equipment he uses. lampboiling tube can be moved away from lamp boiling tube water pondweed metre rule He counts the number of bubbles of gas the pondweed makes in one minute. (a) Which gas is produced by the pondweed during photosynthesis? Circle the correct answer. carbon dioxide nitrogen oxygen water vapour [1] (b) The boiling tube is moved away from the lamp. Complete the sentence. As the amount of light that reaches the pondweed ........................................................... the rate of photosynthesis ........................................................... . [2] (c) Light is a factor that affects the rate of photosynthesis. Suggest one other factor that affects the rate of photosynthesis. ...................................................................................................................................... [1]

11 S/S8/02 © UCLES 2018 [Turn over For Teacher’s Use 10 The diagram shows the structure of copper chloride. = copper = chlorine (a) Describe how you can tell from the diagram that copper chloride is a compound. ...................................................................................................................................... [1] (b) Chlorine is a non-metal. Tick ( ) the correct sentence. Chlorine is a solid at room temperature because it has a high melting point. Chlorine conducts electricity because its molecules are close together. Chlorine is a gas at room temperature because it has a low boiling point. Chlorine conducts heat because its molecules are far apart. [1] (c) Copper is a metal used to make cooking pots. Use ideas about properties to explain why. .......................................................................................................................................... ...................................................................................................................................... [1] (d) Copper has a melting point of 1084 °C. What does this tell you about the forces holding the particles together in solid copper? ...................................................................................................................................... [1]

12 S/S8/02 © UCLES 2018 For Teacher’s Use 11 This question is about electromagnets. (a) Here is a list of apparatus. • a coil of copper wire • an iron rod • electric wires • an electric cell Draw a labelled diagram to show how you can use this apparatus to make an electromagnet. [2] (b) Suggest one advantage of using an electromagnet compared to a bar magnet. ...................................................................................................................................... [1]

13 S/S8/02 © UCLES 2018 [Turn over For Teacher’s Use 12 When we breathe in, oxygen travels from the air to the blood. Oxygen passes through these structures. alveolus bronchiole bronchus nose trachea These structures are not in the correct order. Complete the diagram by writing the names of each structure that oxygen passes through in the correct order. oxygen in the air oxygen in the blood ........................ ........................ ........................ ........................ ........................ [3]

14 S/S8/02 © UCLES 2018 For Teacher’s Use 13 Calcium carbonate is heated strongly. Calcium oxide and carbon dioxide are formed. Write the word equation for this reaction. ............................................................................................................................................. [1] 14 Blessy and Gabriella go to an aerobics class to improve their fitness. They both do the same exercises for the same time. The graph shows how their heart rates change during the exercise. 0 50 60 70 80 90 100 heart rate in beats per minute110 120 130 140 12345 time in minutes 678910 Blessy Gabriella The instructor says that the graph shows that Gabriella is fitter than Blessy. Explain two ways the graph shows this. ................................................................................................................................................. ................................................................................................................................................. ................................................................................................................................................. ............................................................................................................................................. [2]

15 S/S8/02 © UCLES 2018 [Turn over For Teacher’s Use 15 Mike finds this information about the world record for the 1500 m race. 280 270 260 250 240 world record time in seconds 230 220 210 200 191019301950 year197019902010 Calculate the world record speed for the 1500 m race in the year 1930. Write your answer to two significant figures. ................................................................................................................................................. ................................................................................................................................................. ................................................................................................................................................. ................................................................................................................................................. speed .................................. m / s [3] 16 Beryllium reacts with oxygen to form a compound. (a) Write down the name of this compound. ...................................................................................................................................... [1] (b) Explain what is meant by the word compound. .......................................................................................................................................... .......................................................................................................................................... ...................................................................................................................................... [2]

16 S/S8/02 © UCLES 2018 For Teacher’s Use 17 The diagram shows the magnetic field around a bar magnet. N S The bar magnet is turned through 180°. Draw the magnetic field and arrows around this bar magnet. S N [2] Copyright © UCLES, 2018 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. 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..