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Centre number Candidate number
Surname
Forename(s)
Candidate
signature I declare this is my own work.
GCSE
BIOLO H
GY
Higher Tier Paper 1H
Time allowed: 1 hour 45 minutes
Materials
For this paper you must have: For Examiner’s
• a ruler Use Question
• a scientific calculator.
Mark
Instructions 1
• Use black ink or black ball-point pen. 2
• Pencil should only be used for drawing.
3
• Fill in the boxes at the top of this page.
• Answer all questions in the spaces provided. 4
• If you need extra space for your answer(s), use the lined pages 5
at the end of this book. Write the question number against your
answer(s). 6
• Do all rough work in this book. Cross through any work you 7
do not want to be marked.
• In all calculations, show clearly how you work out your answer. TOTAL
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.
*JUN2284611H01*
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8461/1H
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outside the
There are no questions on this box
page
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
*02*
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4
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box
A student investigated the effect of salt concentration on
pieces of potato. This is the method used.
1. Cut three pieces of potato of the same size.
2. Record the mass of each potato piece.
3. Add 150 cm3 of 0.4 mol/dm3 salt solution to a beaker.
4. Place each potato piece into the beaker.
5. After 30 minutes, remove each potato piece and dry the surface with a paper
towel.
6. Record the mass of each potato piece.
7. Repeat steps 1 to 6 using different concentrations of salt solution.
0 1 . 4 What is the independent variable in the investigation?
Tick (□) one box. [1 mark]
Concentration of salt solution
Mass of potato piece
Time potato is left in salt solution
Volume of salt solution
0 1 . 5 Why did the student dry the surface of each potato piece with a
paper towel in step 5?
[1 mark]
*04*
IB/M/Jun22/8461/1H
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