Oxford Cambridge and RSA
Tuesday 11 June 2024 – Morning
GCSE (9–1) Combined Science A
(Gateway Science)
J250/04 Chemistry (Foundation Tier)
Time allowed: 1 hour 10 minutes
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9–1) Combined Science A
F
(Chemistry) (inside this document)
You can use:
• a scientific or graphical calculator
• an HB pencil
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 60.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 24 pages.
ADVICE
• Read each question carefully before you start your answer.
OCR is an exempt Charity
Turn over
, 2
Section A
You should spend a maximum of 20 minutes on this section.
Write your answer to each question in the box provided.
1 What is an effect of increased levels of carbon dioxide in the Earth‟s atmosphere?
A Acid rain
B Global warming
C Light pollution
D Smog
Your answer [1]
2 What are catalysts found in biological systems called?
A Bacteria
B Enzymes
C Isotopes
D Vitamins
Your answer [1]
3 Burning fossil fuels can produce solids called particulates.
Which product of burning fossil fuels is an example of a particulate?
A Carbon
B Carbon monoxide
C Nitrogen dioxide
D Sulfur dioxide
Your answer [1]
© OCR 2024
, 3
4 The word equation shows how iron is extracted from iron oxide.
iron oxide + carbon iron + carbon dioxide
The table shows the masses of the reactants and products.
Iron oxide Carbon Iron Carbon dioxide
Mass (tonnes) 3200 360 1320
What is the mass of iron produced?
A 1880 tonnes
B 2240 tonnes
C 2840 tonnes
D 4880 tonnes
Your answer [1]
5 Scientists think the Earth‟s oxygen-rich atmosphere developed due to photosynthesis by plants.
Which gas in the Earth‟s early atmosphere did plants absorb during photosynthesis?
A Ammonia
B Carbon dioxide
C Methane
D Sulfur dioxide
Your answer [1]
© OCR 2024 Turn over
, 4
6 It is thought that the gases in Earth‟s early atmosphere were released by volcanoes.
The table shows the amounts of different gases released by a volcano.
Which of the gases are carbon dioxide and water vapour?
Gas Percentage of gas
(%)
W 64
X 8
Y 2
Z 26
A W and Z
B W and Y
C X and Y
D X and Z
Your answer [1]
7 A student adds some metals to different solutions.
The table shows their results.
Metal Solution Reaction Key:
✓ = reaction
Copper nickel sulfate ✗
✗ = no reaction
Nickel tin sulfate ✓
Tin copper sulfate ✓
What do the results tell the student about the reactivity of the three metals?
A All three metals have the same reactivity.
B Copper is the most reactive metal.
C Nickel is the most reactive metal.
D Tin is the most reactive metal.
Your answer [1]
© OCR 2024
Tuesday 11 June 2024 – Morning
GCSE (9–1) Combined Science A
(Gateway Science)
J250/04 Chemistry (Foundation Tier)
Time allowed: 1 hour 10 minutes
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9–1) Combined Science A
F
(Chemistry) (inside this document)
You can use:
• a scientific or graphical calculator
• an HB pencil
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 60.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 24 pages.
ADVICE
• Read each question carefully before you start your answer.
OCR is an exempt Charity
Turn over
, 2
Section A
You should spend a maximum of 20 minutes on this section.
Write your answer to each question in the box provided.
1 What is an effect of increased levels of carbon dioxide in the Earth‟s atmosphere?
A Acid rain
B Global warming
C Light pollution
D Smog
Your answer [1]
2 What are catalysts found in biological systems called?
A Bacteria
B Enzymes
C Isotopes
D Vitamins
Your answer [1]
3 Burning fossil fuels can produce solids called particulates.
Which product of burning fossil fuels is an example of a particulate?
A Carbon
B Carbon monoxide
C Nitrogen dioxide
D Sulfur dioxide
Your answer [1]
© OCR 2024
, 3
4 The word equation shows how iron is extracted from iron oxide.
iron oxide + carbon iron + carbon dioxide
The table shows the masses of the reactants and products.
Iron oxide Carbon Iron Carbon dioxide
Mass (tonnes) 3200 360 1320
What is the mass of iron produced?
A 1880 tonnes
B 2240 tonnes
C 2840 tonnes
D 4880 tonnes
Your answer [1]
5 Scientists think the Earth‟s oxygen-rich atmosphere developed due to photosynthesis by plants.
Which gas in the Earth‟s early atmosphere did plants absorb during photosynthesis?
A Ammonia
B Carbon dioxide
C Methane
D Sulfur dioxide
Your answer [1]
© OCR 2024 Turn over
, 4
6 It is thought that the gases in Earth‟s early atmosphere were released by volcanoes.
The table shows the amounts of different gases released by a volcano.
Which of the gases are carbon dioxide and water vapour?
Gas Percentage of gas
(%)
W 64
X 8
Y 2
Z 26
A W and Z
B W and Y
C X and Y
D X and Z
Your answer [1]
7 A student adds some metals to different solutions.
The table shows their results.
Metal Solution Reaction Key:
✓ = reaction
Copper nickel sulfate ✗
✗ = no reaction
Nickel tin sulfate ✓
Tin copper sulfate ✓
What do the results tell the student about the reactivity of the three metals?
A All three metals have the same reactivity.
B Copper is the most reactive metal.
C Nickel is the most reactive metal.
D Tin is the most reactive metal.
Your answer [1]
© OCR 2024
