Cambridge IGCSE Biology practice

Paper 3 structured question: Size of specimens

Try the question first, then check the answer and practise the same topic again.

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Paper

Marks

Topic

Size of specimens

Exam-style question

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Paper 3Theory (Core)3 marks

A leaf is 6 cm long. A photograph of the leaf shows the leaf as 18 cm long.

Description

The actual length of the leaf is 6 cm and the image length on the photograph is 18 cm.

a
State the formula used to calculate magnification.
Your answer
Aim for approximately 1 distinct marking point.
[1]
b
Identify the magnification of the leaf in the photograph.
Your answer
Aim for approximately 2 distinct marking points.
[2]

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Paper 3Theory (Core)3 marks

Description

The student measures the image length of the insect as 10 mm and knows the actual length is 2 mm.

a
State the formula for calculating magnification.
Your answer
Aim for approximately 1 distinct marking point.
[1]
b
Identify the magnification of the insect image.
Your answer
Aim for approximately 2 distinct marking points.
[2]