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Download 2024 AQA GCSE COMBINED SCIENCE: SYNERGY 8465/2F Paper 2 Question Paper + Mark Scheme + Ins and more Exams Earth Sciences in PDF only on Docsity!
2024 AQA GCSE COMBINED SCIENCE: SYNERGY 8465/2F Paper 2 Question Paper + Mark Scheme + Inserts AQA Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature | declare this is my own work. GCSE COMBINED SCIENCE: SYNERGY Foundation Tier Paper 2 Life and Environmental Sciences Wednesday 22 May 2024 Morning Time allowed: 1 hour 45 minutes Materials For Examiner’s Use For this paper you must have: e aruler Question Mark e a protractor 1 e ascientific calculator e the periodic table (enclosed) 2 e the Physics Equations Sheet (enclosed). 3 Instructions 4 e Use black ink or black ball-point pen. 5 e Pencil should only be used for drawing. 6 e Fill in the boxes at the top of this page. e Answer all questions in the spaces provided. Do not write outside the box 7 around each page or on blank pages. 8 e If you need extra space for your answer(s), use the lined pages at the end of 9 this book. Write the question number against your answer(s). e Do all rough work in this book. Cross through any work you do not want to TOTAL be marked. e Inall calculations, show clearly how you work out your answer. Information e The maximum mark for this paper is 100. The marks for questions are shown in brackets. You are expected to use a calculator where appropriate. You are reminded of the need for good English and clear presentation in your answers. | ry ree {o[4}-[2] IML Do not write outside the box Nuclear radiation is dangerous to humans. Nuclear radiation can change atoms into ions. Which type of particle is lost when an atom changes into an ion? [1 mark] Tick (¥) one box. Electron Neutron Proton 238 a) emits an alpha particle (ue) and decays A nucleus of uranium-238 ( js i 234 into thorium ( 90 Th). Which nuclear equation shows this decay? [1 mark] Tick (“) one box. 7etth + 78u + He 98), on 4 Sie me8U + gHe > 728th GiJun24/8465/2F 2 Do not write outside the box [0 [1 ]-[4] Uranium is dug out of the ground in a process called mining. Uranium mining is hazardous because uranium is radioactive. The radioactive decay of uranium produces radon gas which is also radioactive. Table 1 compares the properties of uranium and radon. Table 1 Uranium Radon State of matter Solid Gas Type of radiation emitted Alpha Alpha Colour Grey Colourless People who work in uranium mines are more at risk of harm from radon gas than from uranium. Give two reasons why. Use Table 1. [2 marks] 04 GiJun24/8465/2F 4 Do not write outside the box [0 [1]-[5] Scientists collected data about lung diseases in the population of one country. The scientists used the data to predict the number of people with lung diseases who worked in uranium mines. Table 2 shows the predicted data and the actual data for people who worked in uranium mines. Table 2 Predicted number of people Actual number of people Lung cancer 74 405 Other lung diseases 41 142 Give two conclusions that can be made from the data in Table 2. [2 marks] : [6] Suggest one reason why people who work in uranium mines should be told that uranium is a hazard. [1 mark] Turn over for the next question Turn over > AMM GiJun24/8465/2F 5 Do not write outside the box Carbon monoxide is an atmospheric pollutant. [0 [2].[1] Howis carbon monoxide formed? Tick (~) one box. [1 mark] Incomplete combustion of hydrocarbons Photosynthesis by plants Purification of water Carbon monoxide changes the amount of oxygen that blood can transport. [0 | 2].[2] Which part of the blood transports oxygen? [1 mark] Question 2 continues on the next page Turn over > IML GiJun24/8465/2F 7 Figure 1 shows how the percentage of carbon monoxide in air affects the concentration of oxygen in blood. Figure 1 100 90 80 70 Concentration of oxygen in 60 : blood in arbitrary units 50 40 30 20 10 0 20 40 60 80 Percentage (%) of carbon monoxide in air -[3] When the percentage of carbon monoxide in air is 40% the concentration of oxygen in blood is 64 arbitrary units. Complete Figure 1 to show the result for 40% carbon monoxide in air. [1 mark] 08 GiJun24/8465/2F Do not write outside the ‘box 10 Do not write outside the box [0 [2].[6] Breathing in carbon monoxide can cause carbon monoxide poisoning. Which of the following is a symptom of carbon monoxide poisoning? [1 mark] Tick (“) one box. Burns on the skin Faster heart rate High temperature Carbon monoxide can build up in a room. The risk of carbon monoxide poisoning can be reduced by opening windows in the room. Suggest how opening windows reduces the risk of carbon monoxide poisoning. [1 mark] GiJun24/8465/2F 10 The electromagnetic spectrum is grouped into different types of wave. {0} 3]-[1] Draw one line from each type of wave to a use of the wave. Type of wave Gamma Microwave Ultraviolet Use [3 marks] Fibre optic communications Radio programme transmission Satellite communications Sterilising surgical instruments Sun tanning Question 3 continues on the next page IMI Turn over > GiJun24/8465/2F Do not write outside the box 11 13 Do not write outside the box -[2] What equipment should the student have used to measure time? [1 mark] : [3] The distance between the infrared heater and each thermometer was kept the same throughout the investigation. What type of variable was the distance? [1 mark] Tick (Vv) one box. A control variable A dependent variable An independent variable [0 [3]-[4] What was a risk to the student in the investigation? Tick (“) one box. [1 mark] Burns from the infrared heater Misreading the thermometers Wearing safety glasses Question 3 continues on the next page Turn over > IM GiJun24/8465/2F 13 14 . [5] What was the temperature of the room where the investigation took place? Figure 3 shows the results. Temperature in °C Use Figure 3. 55 50 45 40 30 25 20 15 10 Figure 3 Black surface White surface Time in seconds 50 100 150 200 250 300 Temperature = [1 mark] °C GiJun24/8465/2F Do not write outside the ‘box 14 16 Do not write outside the box Figure 5 shows a green pepper growing on a pepper plant. Figure 5 Leaf Green pepper -[1] Water is lost from the leaves. Complete the sentences. Choose answers from the box. [2 marks] guard cells starch stomata xylem Water is lost through tiny holes in the leaves called The size of each hole is controlled by IMI GiJun24/8465/2F 16 17 Do not write outside the Figure 6 shows a drawing of a cell from a pepper. box Figure 6 -[2] Cell part A contains a green pigment. Label parts A, B and C on Figure 6. Choose answers from the box. [3 marks] cell membrane chloroplast cytoplasm nucleus vacuole Question 4 continues on the next page Turn over > GiJun24/8465/2F 17 (o[4].[4] IMI 19 Do not write outside the Water can move into cells and out of cells. Pox A student investigated how different concentrations of sugar solution affect the mass of pepper tissue. This is the method used. 1. Cut three pieces of pepper 1 cm wide and 1 cm long. 2. Dry each piece. 3. Record the mass of each piece. 4. Leave each piece in sugar solution for 1 hour. 5. Remove the pieces from the sugar solution and dry each piece. 6. Record the mass of each piece. 7. Repeat steps 1 to 6 using different concentrations of sugar solution. Before the investigation, the pepper was wrapped in plastic and kept at 5 °C. Which are two reasons for keeping the pepper wrapped in plastic at 5 °C? [2 marks] Tick (Vv) two boxes. To change the colour of the pepper To decrease the size of the pepper To increase growth of the pepper To reduce water loss from the pepper To slow down decay of the pepper Question 4 continues on the next page Turn over > GiJun24/8465/2F 19 20 Do not write outside the The student calculated the mean percentage change in mass at each concentration box of sugar solution. Figure 7 shows the results. Figure 7 T t TT 20 t t t Mean “HEEPET + HEE FEEEH EERE EEREEEEEEEEEEEEEEE percentage EEE PRE EEE EEE (%) change t ane Hh in mass 10. HH tH i f H Concentration 0 : : 4 of sugar solution 9 ne 3 4 5 6-5 in arbitrary units -10 sasaees anaes ane : H + f * aH 20 1 t EHH t tet -[5] In some concentrations of sugar solution, the mass of the pieces of pepper increased. The mass increased because water moved into the cells. What process moved water into the cells? [1 mark] -[6] What concentration of sugar solution would cause a mean percentage change in mass of 0%? Use Figure 7. [1 mark] Concentration of sugar solution = arbitrary units IMU GiJun24/8465/2F 20 
