GCSE
COMBINED SCIENCE: SYNERGY
Higher Tier Paper 2 Life and Environmental Sciences
H
Wednesday 22 May 2024 Morning Time allowed: 1 hour 45 minutes
Materials For Examiner’s Use
For this paper you must have:
a ruler
Questio Mark
n
a protractor
a scientific calculator
1
the periodic table (enclosed) 2
the Physics Equations Sheet (enclosed).
3
Instructions 4
Use black ink or black ball-point pen. 5
Pencil should only be used for drawing.
6
Fill in the boxes at the top of this page.
Answer all questions in the spaces provided. Do not write outside the box around 7
each page or on blank pages. 8
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). TOTAL
Do all rough work in this book. Cross through any work you do not want to be
marked.
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 clear presentation in your answers.
(JUN24 4652H01) G/LM/Jun24/G4001/E4
8465/2H
, 2
Do not write
outside the
box
0 1 Two students analysed water from four rivers.
Each student measured the pH of the river water using a different method.
Table 1 shows the results.
Table 1
pH of river water
River
Method A Method B
W 7 7.4
X 6 6.5
Y 8 8.1
Z 7 7.6
0 1 . 1 Suggest what was used to measure the pH in each method.
[2 marks]
Method A
Method B
0 1 . 2 Why is it not valid to calculate a mean of the two pH values for each river?
[1 mark]
Tick () one box.
A mean cannot be calculated from only two values.
Each method gives values to a different resolution.
The mean should be calculated for each method using all four samples.
(02
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Jun24/8465/2H
, 3
Do not write
outside the
box
0 1 . 3 Complete the sentence.
Choose the answer from the box.
[1 mark]
accurate repeatable reproducible
Method A and method B gave similar results.
This shows that the results are .
0 1 . 4 Which river is most likely to be in an area with a high concentration of
sulfur dioxide in the air?
Use Table 1. Tick
[1 mark]
() one box.
W X Y Z
. 5 Explain your answer to Question 01.4.
0 1
[3 marks]
Question 1 continues on the next page
Turn over U
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