AQA GCSE COMBINED SCIENCE: SYNERGY 8465/1H Higher Tier Paper 1 Life and Environmental Sciences Version: 1.0 Final G/LM/Jun23/E8 8465/1H (JUN2384651H01) GCSE COMBINED SCIENCE: SYNERGY Higher Tier Paper 1 Life and Environmental Sciences QUESTION PAPER & MAR

GCSE COMBINED SCIENCE: SYNERGY 8465/1H Higher Tier Paper 1 Life and Environmental Sciences Version: 1.0 Final G/LM/Jun23/E8 8465/1H (JUN2384651H01) GCSE COMBINED SCIENCE: SYNERGY Higher Tier Paper 1 Life and Environmental Sciences Tuesday 16 May 2023 Morning Time allowed: 1 hour 45 minutes Materials For this paper you must have: l a ruler l a protractor l a scientific calculator l the periodic table (enclosed) l the Physics Equations Sheet (enclosed). Instructions l Use black ink or black ball-point pen. l Pencil should only be used for drawing. l Fill in the boxes at the top of this page. l Answer all questions in the spaces provided. Do not write outside the box around each page or on blank pages. l 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). l Do all rough work in this book. Cross through any work you do not want to be marked. l In all calculations, show clearly how you work out your answer. Information l The maximum mark for this paper is 100. l The marks for questions are shown in brackets. l You are expected to use a calculator where appropriate. l You are reminded of the need for good English and clear presentation in your answers. For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 TOTAL Please write clearly in block capitals. Centre number Candidate number Surname ________________________________________________________________________ Forename(s) ________________________________________________________________________ Candidate signature ________________________________________________________________________ I declare this is my own work. H 2 (02) G/Jun23/8465/1H Do not write outside the box 0 1 This question is about the blood and the circulatory system. 0 1 . 1 Give the functions of red blood cells, white blood cells and platelets. [3 marks] Red blood cells ___________________________________________________________________ ___________________________________________________________________________________ White blood cells _________________________________________________________________ ___________________________________________________________________________________ Platelets __________________________________________________________________________ ___________________________________________________________________________________ Figure 1 shows a human heart. Figure 1 Right atrium C A D B 3 (03) G/Jun23/8465/1H Do not write outside the box Turn over U 0 1 . 2 Draw one arrow on Figure 1 to show the movement of the blood between the left atrium and the left ventricle. [1 mark] 0 1 . 3 Which blood vessel carries blood from the lungs into the heart? [1 mark] Tick () one box. A B C D 0 1 . 4 Which blood vessel is the aorta? [1 mark] Tick () one box. A B C D 0 1 . 5 What structures prevent blood flowing in the wrong direction through the heart? [1 mark] __________________________________________________________________________________ Question 1 continues on the next page 4 (04) G/Jun23/8465/1H Do not write outside the box 0 1 . 6 Heart muscle cells obtain oxygen from the blood. Which blood vessels exchange oxygen with heart muscle cells? [1 mark] Tick () one box. Arteries Capillaries Veins 0 1 . 7 Heart rate is controlled by a group of cells called the pacemaker. Where is the pacemaker in the heart? [1 mark] Tick () one box. Left atrium Left ventricle Right atrium Right ventricle 5 (05) G/Jun23/8465/1H Do not write outside the box Turn over U Carbon monoxide is a toxic gas. 0 1 . 8 Explain why an increase of carbon monoxide in the air increases heart rate. [3 marks] ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ 0 1 . 9 A person was exposed to carbon monoxide in the air for 1 hour. During the hour the person’s heart rate increased from 80 beats per minute to 130 beats per minute. Calculate the percentage increase in heart rate. Use the equation: percentage increase = final heart rate – starting heart rate starting heart rate × 100 [2 marks] ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ Percentage increase = _______________________________ % ____ 14 6 (06) G/Jun23/8465/1H Do not write outside the box 0 2 A species of grass has the binomial name Lolium perenne. 0 2 . 1 What is the genus of the grass? [1 mark] ___________________________________________________________________________________ Grass leaves look green because of a green pigment found in chloroplasts. 0 2 . 2 Name the green pigment found in chloroplasts. [1 mark] ___________________________________________________________________________________ 0 2 . 3 Which mineral ion is found in the green pigment in chloroplasts? [1 mark] Tick () one box. Magnesium ion Nitrate ion Sodium ion 7 (07) G/Jun23/8465/1H Do not write outside the box Turn over U An area of grass changed colour after being covered by a tent. The colour of the grass changed from green to yellow. Figure 2 shows the area of green grass and the area of yellow grass. Figure 2 Green grass Yellow grass Question 2 continues on the next page 8 (08) G/Jun23/8465/1H Do not write outside the box A student used paper chromatography to investigate the pigments in grass leaves from: l the area of green grass l the area of yellow grass. Figure 3 shows the results. Figure 3 Distance moved by solvent Start line Green grass leaves Yellow grass leaves 9 (09) G/Jun23/8465/1H Do not write outside the box Turn over U 0 2 . 4 The student crushed the grass leaves. Describe a method to separate the pigments in the crushed grass leaves using paper chromatography. [6 marks] ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ Question 2 continues on the next page 10 G/Jun23/8465/1H Do not write outside the box (10) Figure 3 is repeated below. Figure 3 Distance moved by solvent Start line Green grass leaves Yellow grass leaves 11 G/Jun23/8465/1H Do not write outside the box Turn over U (11) 0 2 . 5 Determine the Rf value of the pigment that is found in green grass leaves but not found in yellow grass leaves. Use the equation: Rf = distance moved by pigment distance moved by solvent Use Figure 3. [4 marks] ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ Rf = _______________ 0 2 . 6 There are fewer pigments in the yellow grass leaves than in the green grass leaves. Suggest one reason why. [1 mark] ___________________________________________________________________________________ ___________________________________________________________________________________ ____ 14 12 G/Jun23/8465/1H Do not write outside the box (12) 0 3 Figure 4 shows part of the water cycle. Figure 4 Ocean Clou