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Download 2024 AQA GCSE COMBINED SCIENCE: SYNERGY 8465/1F Paper 1 Question Paper + Mark Scheme + Ins and more Exams Environmental Science in PDF only on Docsity!
2024 AQA GCSE COMBINED SCIENCE: SYNERGY 8465/1F Aaper 1 Question Paper + Mark Scheme + Inserts AQA Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature GCSE COMBINED SCIENCE: SYNERGY Foundation Tier Paper 1 Life and Environmental Sciences | declare this is my own work. Friday 10 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 aprotractor 4 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 this book. Write the question number against your answer(s). 2 e Do all rough work in this book. Cross through any work you do not want to 10 be marked. e Inall calculations, show clearly how you work out your answer. USS 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. | rere 2 Do not write outside the box Figure 1 shows a food chain. Figure 1 oma Polar bear Pa LAY ESS Seal .. Fish aia< Krill ia Algae e HK ee not to scale [0 [1].[4] Which of the organisms in Figure 1 is the primary consumer? [1 mark] . [2] Name the predator of the fish in Figure 1. [1 mark] IML GiJun24/8465/1F Do not write outside the box [0 | 1]-[5] Food chains and food webs can be used to predict the effect of a decreasing number of polar bears. Why is a food web more useful than a food chain? [1 mark] Tick (Vv) one box. Food webs show where energy is wasted. Most animals eat more than one type of prey. Producers are at the start of all food webs. -[6] Krill eat algae. Algae store a mass of 68 arbitrary units of carbon in 1 year. 8% of the carbon stored in algae becomes part of the carbon stored in krill. Calculate the mass of carbon that becomes stored in krill. Use the equation: mass of carbon stored in krill = mass of carbon stored in algae = oe 100 [2 marks] Mass of carbon stored in krill = arbitrary units IML GiJun24/8465/1F Do not write outside the box Algae and plants need magnesium ions to grow. Complete the sentence. Choose the answer from the box. [1 mark] chlorophyll glucose urea In algae and plants, magnesium ions become part of J The minerals in sea water are one abiotic factor that affects algae. Which are two other abiotic factors that affect algae? [2 marks] Tick (Vv) two boxes. Food availability Light intensity Pathogens Prey Temperature Turn over for the next question Turn over > AMM GiJun24/8465/1F Do not write outside the box [0 [2].[1] The mass of the cube of wax was 0.15 kg. The energy transferred to melt the wax was 31 500 J. Calculate the specific latent heat of fusion of wax. Use the equation: energy for a change of state specific latent heat = nergy Tora change of stale mass Choose the unit from the box. [3 marks] J Jikg kg Specific latent heat of fusion = Unit [0 | 2].[2] Notall of the energy transferred by the heater was used to melt the wax. What happened to the energy that was not used to melt the wax? [1 mark] Tick (“) one box. The energy decreased the temperature of the wax. The energy increased the mass of the wax. The energy was transferred to the surroundings. Question 2 continues on the next page Turn over > IML GiJun24/8465/1F [0 [2].[3] Which two of the following would increase the accuracy of the student's results? AMM Tick (“) two boxes. Completing the investigation in a colder environment. Insulating the sides of the beaker that the wax was in. Stirring the wax as it was melting. Using a beaker with a larger volume. Using a smaller mass of wax. The student continued to heat the wax after it had melted. The student measured the temperature of the wax every 10 seconds. Figure 3 shows how the temperature of the liquid wax varied with time. Figure 3 85 80+ Temperature in°C 65 t 60 0 20 40 60 80 Time in seconds [2 marks] GiJun24/8465/1F Do not write outside the ‘box 10 10 The atmosphere of the Earth has changed since the Earth formed. The Earth's early atmosphere may have been similar to the atmosphere of Mars today. Figure 4 shows the main gases in the atmosphere of Mars today and the atmosphere of the Earth today. Figure 4 Mars today Earth today Carbon dioxide and Nitrogen Oxygen and other gases oe gases Carbon dioxide Oxygen 20.9% Nitrogen 78.1% [0] 3|.[1] Determine percentage X in Figure 4. [2 marks] X= % IMI 1 ie) GiJun24/8465/1F Do not write outside the ‘box (o[3]-[2] {o[3}-[3] (o[3]-[4] IMI 11 11 Do not write outside the box Give three differences between the atmosphere of the Earth today and the atmosphere of Mars today. Use Figure 4. [3 marks] 1 2 3 What was the source of the nitrogen in the Earth’s early atmosphere? [1 mark] Tick (“) one box. Decay of dead animals Formation of sedimentary rocks Volcanic activity Why did the formation of oceans cause the carbon dioxide concentration in the Earth’s early atmosphere to change? [1 mark] Tick (v) one box. Carbon dioxide condensed to form the oceans. Carbon dioxide dissolved in the oceans. Carbon dioxide evaporated from the oceans. Question 3 continues on the next page Turn over > GiJun24/8465/1F 13 13 Do not write outside the box The symptoms of a measles infection include: e a fever e ared skin rash. [0] 4].[1] Why do antibiotics not treat measles? Tick (“) one box. [1 mark] Antibiotics cause the measles pathogen to release toxins. Antibiotics do not kill viruses. Antibiotics increase body temperature. [0] 4].[2] Cilia are small hair-like structures in the trachea and bronchi. Describe how mucus and cilia defend against the entry of pathogens into the lungs. [2 marks] Mucus Cilia [0 | 4].[3] How does stomach acid defend the body against pathogens? [1 mark] Question 4 continues on the next page Turn over > 13 GiJun24/8465/1F [o[4).[4] (o[4]-[5] 14 14 Do not write outside the box People can be vaccinated against measles. What does the measles vaccine contain? [1 mark] Tick (“) one box. Hormones Two types of blood cell Weakened pathogen Which part of the blood produces antibodies after receiving the measles vaccination? [1 mark] Tick (“) one box. Platelets Red blood cells White blood cells GiJun24/8465/1F IMI 16 16 Do not write outside the box In one group of people: e 25 people have been vaccinated against measles e 5 people have not been vaccinated against measles. What is the simplest ratio of people who have been vaccinated to people who have not been vaccinated? [1 mark] Tick (“) one box. 30:1 25:1 Scientists recommend that over 95% of the population should be vaccinated against measles. What is the advantage of a large percentage of the population being vaccinated against measles? [1 mark] GiJun24/8465/1F {o[5].[2] 17 17 This question is about the nervous system. A person steps on a sharp object. The person immediately moves their foot away from the object in a reflex action. Complete the sentences. Choose answers from the box. [3 marks] a gland a muscle a neurone the skin the spinal cord When the person steps on the object, the receptor is in An electrical impulse travels from the receptor along The effector is What is the name of the gap between two neurones? [1 mark] Tick (v) one box. A coordinator A reflex arc A synapse Question 5 continues on the next page Turn over > GiJun24/8465/1F Do not write outside the box 19 19 Do not write outside the box [0 [5]-[4] What was the mean reaction time of 10-year-olds? Use Figure 6. [1 mark] Mean reaction time = milliseconds -[5] How old were the students with the lowest mean reaction time? Use Figure 6. [1 mark] Tick (v) one box. 10 years old 11 years old 12 years old [0 |5]-[6] The scientist also measured the reaction time of 35 adults. Describe how to calculate the mean reaction time for the 35 adults. [2 marks] Question 5 continues on the next page Turn over > GiJun24/8465/1F 20 20 Do not write outside the box [7] The reaction time of one adult was 450 milliseconds. What is the reaction time of the adult in seconds? 1 second = 1000 milliseconds. [1 mark] Reaction time = seconds 1 IMM GiJun24/8465/1F 
