Science Stage 7 Paper 1 2022 45 minutes No additional materials are needed. INSTRUCTIONS • Answer all questions. • Write your answer to each question in the space provided. • You should show all your working on the question paper. INFORMATION • The total mark for this paper is 50. • The number of marks for each question or part question is shown in brackets [ ]. 3144_01_8RP © UCLES 2022 2 1 Look at the diagram of an animal cell. A B (a) Write down the name of structure A. [1] (b) Write down the function of structure A. [1] (c) Write down the name of structure B. [1] (d) Write down the function of structure B. [1] © UCLES 2022 S/S7/01 3 2 Look at the particle models for elements X, Y and Z. = one atom of X X = one atom of Y = one atom of Z Y Z (a) Write down two characteristics of an element. 1 2 [2] (b) Element X reacts with element Z. Look at the particle model of the substance made. Circle the type of substance made. compound mixture Explain your answer. [2] (c) Draw a particle model for a mixture of elements X and Y. [1] © UCLES 2022 S/S7/01 [Turn over 4 3 Mike makes an electrical circuit. lamp 1 lamp 2 (a) Mike wants to turn the lamps on and off. Which component does he add to his electrical circuit? [1] (b) Mike wants to add a buzzer to his electrical circuit. Draw the electrical symbol for a buzzer. [1] (c) Lamp 1 and lamp 2 are in a series circuit. Lamp 1 stops working. Explain why lamp 2 also stops working. [1] © UCLES 2022 S/S7/01 5 4 Look at the diagram of the Earth, Sun and Moon. Moon Earth Sun NOT TO SCALE (a) The Earth orbits the Sun. Name the force that keeps the Earth in its orbit. [1] (b) Explain what happens during a solar eclipse. You may use the diagram to explain your answer. [2] © UCLES 2022 S/S7/01 [Turn over 6 5 Mia investigates the rate of decomposition of slices of apple. Mia: • puts one slice of apple into each of the three dishes • keeps the dishes at different temperatures • records the mass of each slice of apple every day for five days. at 4°C at 20°C at 30°C (a) Write down the independent variable in this investigation. [1] (b) Mia wants her investigation to be a fair test. Identify three control variables for her investigation. 1 2 3 [3] (c) Mia measures the mass of each slice of apple every day for five days. She uses this information to calculate the rate of decomposition. (i) Which two pieces of equipment does Mia use to make these measurements? and [1] (ii) Describe how Mia uses these measurements to calculate the rate of decomposition. [1] © UCLES 2022 S/S7/01 7 6 Copper carbonate is a green solid. When copper carbonate is heated a black solid called copper oxide is made. Carbon dioxide is also made. (a) Write down the names of the reactant and the products in this reaction. reactant products [1] (b) A chemical reaction takes place when copper carbonate is heated. Write down two observations that show a chemical reaction takes place. 1 2 [2] (c) Which chemical is used to test for carbon dioxide? [1] © UCLES 2022 S/S7/01 [Turn over 8 7 Carlos investigates the energy stored in an elastic band. Here is his method. Carlos: • stretches the elastic band to a length of 10 cm • lets go of the elastic band • measures the distance the elastic band travels • repeats this experiment two more times. elastic band Carlos then measures the distances travelled when the elastic band is stretched to different lengths. He stretches the elastic band to lengths of 12 cm, 14 cm and 16 cm. Look at the results. length of the stretched elastic band in cm distance the elastic band travels in cm 1st experiment 2nd experiment 3rd experiment 10 78 46 80 12 120 125 124 123 14 220 220 215 218 16 380 370 400 383 average (a) Energy is stored in the stretched elastic band. There is an energy change when Carlos lets go of the elastic band. Complete the diagram to suggest the types of energy released. + stored energy [2] © UCLES 2022 S/S7/01 9 (b) Name the equipment Carlos uses to measure the distance the elastic band travels. [1] (c) (i) One of the results is anomalous. Circle the anomalous result in the table. [1] (ii) Look at the results when the elastic band is stretched to a length of 10 cm. Calculate the average distance the elastic band travels. Write your answer in the table. [1] (iii) Carlos thinks the result is anomalous because he pointed the elastic band upwards and not sideways. Suggest why this will make the result anomalous. [1] 8 Complete these sentences about the water cycle. Heat from the Sun causes water in seas, rivers and lakes to Clouds form when water vapour in the air . . Water falling as rain is called . Some of this water filters into the Earth’s surface. This water is called . [4] © UCLES 2022 S/S7/01 [Turn over 10 9 Look at the diagrams of the four arthropods, A, B, C and D. A B C D NOT TO SCALE Use the key to identify each arthropod. 1a has two claws go to 2 1b does not have claws go to 3 2a has a segmented tail Orconectes punctimanus 2b does not have a segmented tail Cancer pagurus 3a has wings Schistocerca gregaria 3b does not have wings Enantiulus armatus Write the letter of the correct arthropod next to its name. Orconectes punctimanus Cancer pagurus Schistocerca gregaria Enantiulus armatus [2] © UCLES 2022 S/S7/01 11 10 Angelique has bottles of four different solutions, W, X, Y and Z. The bottles have lost their names. She tests each solution with Universal Indicator. Here are her results. solution colour when Universal Indicator added W green X yellow Y purple Z red (a) Draw a line to match the correct solution to its name. solution name W sodium hydroxide (strongly alkaline) X distilled water (neutral) Y citric acid (weakly acidic) Z hydrochloric acid (strongly acidic) [3] (b) Which hazard label is put onto a bottle containing a corrosive liquid? Tick () the correct box. [1] © UCLES 2022 S/S7/01 [Turn over 12 11 Ahmed finds this information about six substances. substance property A high boiling point B low melting point C gas at room temperature D shiny E magnetic F ductile (a) Use these properties to sort the six substances into metals and non-metals. One has been done for you. metal non-metal E [2] © UCLES 2022 S/S7/01 13 (b) Ahmed investigates the electrical conductivity of three metals, X, Y and Z. Here is his equipment. metal Here are his results. metal brightness of lamp X dim Y bright Z bright Ahmed concludes that metals Y and Z are better electrical conductors than metal X. Suggest an improvement to Ahmed’s experiment to find out which is the better electrical conductor, Y or Z. Explain your suggestion. improvement explanation [2] © UCLES 2022 S/S7/01 [Turn over 14 12 This question is about sound. (a) Describe how sound travels through a material. [1] (b) Look at the bar chart. It shows the speed of sound through different materials. 6000 5000 4000 speed of sound 3000 in m / s 2000 1000 0 glass aluminium air material (i) Suggest why sound travels quicker through glass than through air. [1] (ii) Predict the speed of sound through water. m/s Explain your answer. [2] (iii) Sound does not travel in a vacuum. Explain why. [1] © UCLES 2022 S/S7/01 15 BLANK PAGE © UCLES 2022 S/S7/01 © UCLES 2022 21 S/S7/01 calcium 40 38 Sr strontium 88 56 Ba barium 137 88 potassium 39 37 Rb rubidium 85 55 Cs caesium 133 87 actinoids lanthanoids – Ca K – actinoids 20 19 Ra 24 23 radium 89–103 magnesium sodium Fr 57–71 Mg Na francium 89 12 11 22 cerium 140 90 Th thorium 232 lanthanum 139 89 Ac actinium – 231 protactinium Pa 91 141 praseodymium Pr 59 58 Ce 57 – – dubnium Db 105 181 tantalum Ta 73 93 niobium Nb 41 51 vanadium V 23 Cr 24 238 uranium U 92 144 neodymium Nd 60 – seaborgium Sg 106 184 tungsten W 74 96 molybdenum Mo 42 52 chromium relative atomic mass rutherfordium Rf 104 178 hafnium Hf 72 91 zirconium Zr 40 48 titanium Ti La lanthanoids yttrium Y 39 45 scandium Sc 9 7 name atomic symbol Be beryllium Li lithium atomic number 4 3 Key 2 1 – neptunium Np 93 – promethium Pm 61 – bohrium Bh 107 186 rhenium Re 75 – technetium Tc 43 55 manganese Mn 25 – plutonium Pu 94 150 samarium Sm 62 – hassium Hs 108 190 osmium Os 76 101 ruthenium Ru 44 56 iron Fe 26 27 28 29 30 – americium Am 95 152 europium Eu 63 – meitnerium Mt 109 192 – curium Cm 96 157 gadolinium Gd 64 – darmstadtium Ds 110 195 platinum Pt Ir iridium 78 106 palladium Pd 46 59 nickel Ni 77 103 rhodium Rh 45 59 cobalt Co – berkelium Bk 97 159 terbium Tb 65 – roentgenium Rg 111 197 gold Au 79 108 silver Ag 47 64 copper Cu – californium Cf 98 163 dysprosium Dy 66 – copernicium Cn 112 201 mercury Hg 80 112 cadmium Cd 48 65 zinc Zn B C – einsteinium Es 99 165 holmium Ho 67 – nihonium Nh 113 204 thallium Tl 81 115 – fermium Fm 100 167 erbium Er 68 – flerovium Fl 114 207 lead Pb 82 119 tin Sn In indium 50 73 germanium Ge 32 28 silicon 49 70 gallium Ga 31 27 aluminium Si 14 13 Al 12 carbon 11 boron 6 – mendelevium Md 101 169 thulium Tm 69 – moscovium Mc 115 209 bismuth Bi 83 122 antimony Sb 51 75 arsenic As 33 31 phosphorus P 15 14 nitrogen N 7 – nobelium No 102 173 ytterbium Yb 70 – livermorium Lv 116 – polonium Po 84 128 tellurium Te 52 79 selenium Se 34 32 sulfur S 16 16 oxygen O 8 – lawrencium Lr 103 175 lutetium Lu 71 – tennessine Ts 117 – astatine At 85 127 iodine I 53 80 bromine Br 35 35.5 chlorine Cl 17 19 fluorine F 9 – oganesson Og 118 – radon Rn 86 131 xenon Xe 54 84 krypton Kr 36 40 argon Ar 18 20 neon Ne 10 4 5 helium 8 1 7 hydrogen 6 2 5 He 4 H 3 1 Group The Periodic Table of Elements 16 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 annually and is available to download at https://lowersecondary.cambridgeinternational.org/ Cambridge Assessment International Education is part of Cambridge Assessment. Cambridge Assessment is the brand name of the University of Cambridge Local Examinations Syndicate (UCLES), which is a department of the University of Cambridge.
