AQA GCSE COMBIND SCIENCE 8464/B/2H TRILOGY HIGHER TIER
BIOLOGY PAPER 2H EXAM QUESTION PAPER
(AUTHENTIC MARKING SCHEME ATTACHED)
H
GCSE
COMBINED SCIENCE: TRILOGY
Higher Tier
Biology Paper
2H
Time allowed: 1 hour 15 minutes
Materials
For Examiner’s
For this paper you must have: Use
a ruler
Questio Mark
a scientific calculator. n
1
Instructions
2
Use black ink or black ball-point pen.
Pencil should only be used for drawing. 3
Fill in the boxes at the top of this page. 4
Answer all questions in the spaces provided. 5
If you need extra space for your answer(s), use the lined pages at
6
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 70.
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.
*jun22 464 2h01*
IB/M/Jun22/E10
8464/B/2H
, 2
Do not write
outside the
0 1 This question is about the cycling of water and carbon in box
ecosystems.
0 1 .1 Which reaction produces
water? [1 mark]
Tick () one box.
Aerobic respiration
Anaerobic
respiration
Photosynthesis
The water cycle provides water for plants and animals on land before the
water goes into lakes and seas.
Figure 1 represents the water cycle.
Figure 1
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, 3
Do not write
outside the
box
0 1 .2 Name the processes 1 to 5 shown on Figure 1.
[5 marks]
1
2
3
4
5
0 1 .3 In 2007 the population of the world was 6 000 000 000
A study found that 4.5% of the population had severe water shortage.
Calculate how many people had severe water
shortage. Give your answer in standard form.
[3 marks]
Number of people (in standard form) =
Question 1 continues on the next page
Turn over ►
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, 4
Do not write
outside the
0 1 .4 Why do more people have severe water shortage now than box
in 2007? [2
marks]
Tick () two boxes.
Climate change has increased the area of deserts.
Each person drinks less water.
More water is used to grow crops.
Sea levels have risen because the ice caps are
melting.
Some countries have built de-salting factories for
seawater.
Leaves on a tree contain carbon
compounds. In autumn the leaves fall
to the ground.
0 1 .5 Microorganisms in the soil recycle carbon from the leaves so that the
carbon is used for new plant growth.
Explain how.
[4 marks]
*04
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