AQA GCSE COMBINED SCIENCE_ SYNERGY 1H 2025 PREDICTED QUESTION PAPER

1




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H
GCSE

COMBINED SCIENCE : SYNERGY
8465/1H
Higher Tier Paper 1 Life and Environmental Science
Materials Time allowed: 1 hour 45 minutes
For this paper you must have:
a ruler
a scientific calculator
the periodic table (enclosed).
For Examiner’s Use
Instructions
Question Mark
Use black ink or black ball-point pen.
1
Pencil should only be used for drawing.
Fill in the boxes at the top of this page. 2
Answer all questions in the spaces provided. 3
Do not write outside the box around each page 4
or on blank pages.
5
If you need extra space for your answer(s), use the lined
pages at the end of this book. Write the question number 6
against your answer(s). 7
Do all rough work in this book. Cross through any work you do not want 8
to be marked.
TOTAL
In all calculations, show clearly how you work out your answer.

Information
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
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SOLE Property of Tyrion's GCSEGCSE PaperPaper
8465/4H
8465/4H 1 Life1and
LifeEnvironmental
and Environmental Science
Science

, 2


Do not write
Outside the
Box
0 1 1 Fill in the blanks:

• Red blood cells transport __________ to body tissues.
• White blood cells help defend the body against __________.
• Platelets are responsible for __________ when a blood vessel is damaged.
[3 Marks]
0 1 2




Figure 1


1. Draw an arrow on the diagram to show how blood flows from the left atrium
to the left ventricle.

2. Which blood vessel carries oxygenated blood from the lungs into the heart?

o Tick one box:
 A: Pulmonary artery
 B: Pulmonary vein
 C: Aorta
 D: Vena cava
o Tick one box:
 Valves
 Arteries
 Veins [4 Marks]

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GCSE 8465/4H Paper 1 Life and Environmental Science

, 3

Do not wri
Outside th
Box
0 1 3 A person exposed to carbon monoxide in polluted air experienced an increased
heart rate.

1. Explain why carbon monoxide exposure increases heart rate.
……………………………………………………………………………………………………………
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[3 Marks]

2. During exposure, their heart rate increased from 70 beats per minute (bpm) to
105 bpm. Calculate the percentage increase in heart rate using the
Final heart rate−Starting heart rate
formula: Percentage increase = Starting heart rate
× 100Show your
working.
……………………………………………………………………………………………………………
…………………….………………………………………………………………………………………
………………………………………….…………………………………………………………………
[1 Marks]

0 2 1 The students set up the experiment as shown in Figure 1.




1. Describe how the students could change the light intensity during the
experiment.
……………………………………………………………………………………………………………
………………….…………………………………………………………………………………………
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[1 Marks]

2. Suggest two variables the students should control to ensure a fair test.
……………………………………………………………………………………………………………
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……………………………………….……………………………………………………………………

[2 Marks]

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GCSE 8465/4H Paper 1 Life and Environmental Science