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Download 2024 AQA GCSE COMBINED SCIENCE: SYNERGY 8465/1H Paper Question Paper + Mark Scheme + Inser and more Exams Environmental Science in PDF only on Docsity!
2024 AQA GCSE COMBINED SCIENCE: SYNERGY 8465/1H Paper 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 Higher 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: a ruler Question Mark a protractor a scientific calculator the periodic table (enclosed) the Physics Equations Sheet (enclosed). Instructions e Use black ink or black ball-point pen. Pencil should only be used for drawing. Fill in the boxes at the top of this page. Answer all questions in the spaces provided. Do not write outside the box around each page or on blank pages. 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). Do all rough work in this book. Cross through any work you do not want to be marked. e Inall calculations, show clearly how you work out your answer. USS O/a|N/olalaAlwoln}a o 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. 0 ee anee/a (o[4}-[4] {o[4}.[2] IML Do not write outside the box Bacteria can cause disease. Bacterial cells do not have a nucleus. Which term describes bacterial cells? [1 mark] Tick (Vv) one box. Eukaryotic Fungal Prokaryotic Bacterial cells have no nucleus and are smaller than animal cells. Give one other difference between bacterial cells and animal cells. [1 mark] G/Jun24/8465/1H 2 Do not write outside the Figure 1 shows two graphs: box e The rainfall in one town in one month. e The number of cases of E. coli in the town in the same month. Figure 1 80 60 Rainfall in mm 40 20 0 5 10 15 20 25 30 Time in days 50 40 30 Number of cases of E. coli 20 10 30 Time in days wu , Do not write outside the box [0] 1]-[4] The rainfall on day 12 was greater than on day 10. Calculate how many times greater. [3 marks] Number of times greater = [0 [1]-[5] Symptoms of E. coli infection usually occur 5 days after infection. A scientist stated: ‘Increased rainfall causes an increase in the number of cases of E. coli.” Describe one piece of evidence from Figure 1 that supports the scientist's statement. [1 mark] Question 1 continues on the next page Turn over > AMM G/Jun24/8465/1H 5 Do not write outside the box Turn over for the next question DO NOT WRITE/ON THIS PAGE ANSWER IN THE/SPACES PROVIDED Turn over > IML G/Jun24/8465/1H 7 Do not write outside the - Figure 2 shows equipment used to investigate how light intensity affects photosynthesis. Figure 2 Bubbles of gas Pondweed in water Lamp c I i L I L I 0 10 20 30 40 50 Distance from lamp in cm The light intensity can be changed by moving the pondweed to different distances from the lamp. Describe a method to investigate the effect of light intensity on the rate of photosynthesis in pondweed. [6 marks] AMM G/Jun24/8465/1H 8 10 Do not write outside the box Figure 3 shows a ripple tank used to investigate the behaviour of water waves. Figure 3 Bar vibrating up and down Mark on side of tank Mark on side of tank -[1] Water waves are transverse waves. Complete the sentence. Choose the answer from the box. [1 mark] parallel perpendicular the same In transverse waves, the direction of oscillation and the direction of energy transfer are G/Jun24/8465/1H 10 11 Do not write outside the box [0 | 3]-[2] Describe a method a student could use to determine the frequency of the water waves. [4 marks] Question 3 continues on the next page Turn over > 11 G/Jun24/8465/1H 11 13 Do not write outside the box -[4] Figure 4 shows the water waves in the ripple tank when viewed from above. Figure 4 Wave peaks rt [7 Figure 4 has been drawn to actual size. The water waves have a frequency of 2.5 Hz. Calculate the wave speed of the waves in Figure 4. You should take measurements from Figure 4. [4 marks] Wave speed = m/s Turn over > 13 G/Jun24/8465/1H 13 {o[4).[4] {o[4].[2] {o[4}.[3] 14 The symptoms of a measles infection are: e a fever e ared skin rash. Why can measles not be treated with antibiotics? Do not write outside the box [1 mark] Describe two ways the human body defends against the entry of the measles pathogen into the lungs. [2 marks] A person is given a measles vaccination by injection. There is a small amount of bleeding from the wound. What is the role of platelets after the person receives the injection? Tick (v) one box. To begin phagocytosis To cause the blood to clot To release antitoxins [1 mark] G/Jun24/8465/1H 14 16 Do not write outside the box This question is about the nervous system. A person steps on a sharp object. The person immediately moves their foot away from the object. The response is a pain withdrawal reflex. . [4] Describe two ways that a reflex action is different from a conscious action. IMI [1 mark] G/Jun24/8465/1H 16 17 Do not write outside the box [0 | 5].[2] Describe how the nervous system causes the reflex action after stepping on the sharp object. [6 marks] Question 5 continues on the next page Turn over > IM G/Jun24/8465/1H 17 19 Do not write outside Ine [0 |5]-[3] Inthe investigation the sex, physical health and mental health of the students were control variables. Suggest one other control variable the scientists should have used. [1 mark] [0[5].[4] Determine the size of the range of CRT for students aged 11 years. Give your answer in seconds. [3 marks] Size of range = seconds -[5] A student stated: ‘The age of students affects their reaction time.’ Evaluate the student's statement. Use Figure 5. [2 marks] 13 Turn over > IMI 9 G/Jun24/8465/1H 19 20 Do not write outside the ‘box The atmosphere of the Earth has changed since the Earth formed. : [4] What was the source of nitrogen in the Earth’s early atmosphere? [1 mark] [0 [6 ].[2] Figure 6 shows the change in the percentage of nitrogen in the Earth's atmosphere during the last 4.5 billion years. Figure 6 T t | } 80 1 a | < ae 1 | i 1 1 | 60 ++ t 1 tt tt Percentage (%) - of nitrogen 40+ tr EERE SEE = in atmosphere rane 1 t t 20+} t & HHA SERESEEEES + Lt fot I t f : T T 0 t I 4 3 2 1 0 Time in billions of years ago Present day IMU G/Jun24/8465/1H 20 
