AQA GCSE COMBINED SCIENCE 8464/C/2F TRILIGY FOUNATION
TIER CHEMISTRY PAPER 2F EXAM QUESTION PAPER
(AUTHENTIC MARKING SCHEME ATTACHED)
F
GCSE
COMBINED SCIENCE: TRILOGY
Foundation Tier
Chemistry Paper 2F
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
the periodic table (enclosed). 1
2
Instructions
Use black ink or black ball-point pen. 3
Pencil should only be used for drawing. 4
Fill in the boxes at the top of this page. 5
Answer all questions in the spaces provided.
6
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 7
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.
*jun22464c2F01*
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, 2
Do not write
outside the
0 1 This question is about the Earth’s atmosphere. box
0. 1 1 Earth’s atmosphere contains 21% oxygen.
The
Draw the bar for oxygen on Figure 1.
[1
mark]
Figure 1
0 1 .2 What is used to test for oxygen gas?
[1 mark]
Tick () one box.
A burning splint
A glowing splint
Damp litmus
paper
Limewater
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, 3
Do not write
outside the
The Earth’s early atmosphere was very different from the Earth’s box
atmosphere today.
Figure 2 shows the composition of the Earth’s early atmosphere and of the
Earth’s atmosphere today.
Figure 2
0 1
.3 The percentages of nitrogen and oxygen in the Earth’s atmosphere today are
different from the Earth’s early atmosphere.
Complete the sentences.
Choose answers from the
box. Use Figure 2.
Each answer can be used once, more than once or not at all.
[2 marks]
decreased increased stayed the same
Since the Earth’s early atmosphere, the percentage of nitrogen in the
Earth’s
atmosphere has .
Since the Earth’s early atmosphere, the percentage of oxygen in the
Earth’s
atmosphere has .
Turn over ►
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, 4
Do not write
outside the
0 1 .4 The Earth’s atmosphere today contains a small amount of box
carbon dioxide.
Why has the percentage of carbon dioxide decreased since
the Earth’s early atmosphere? [2
marks]
Tick () two boxes.
Dissolved in oceans
Formation of sedimentary
rocks
Industrialisation
Respiration
Volcanic activity
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