1. Here are four uses of radioactivity. Draw a line from each one of them to the type of radiation it uses. Each type of radiation may be chosen once, more than once or not at all. Use of radioactivity Type of radiation it uses sterilisation of medical equipment alpha household fire (smoke) alarm beta gauging thickness of cardboard gamma irradiating food (b) Which graph best shows how the activity of a radioactive isotope changes with time? Put a cross (✗) in the box next to your answer. activity activity (c) Complete the sentence by putting a cross (✗) in the box next to your answer. The unit of activity of a radioactive isotope is the A americium B becquerel C einstein D radium

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1. Here are four uses of radioactivity - Edexcel - GCSE Physics - Question 1 - 2013 - Paper 1

Question 1

1. Here are four uses of radioactivity. Draw a line from each one of them to the type of radiation it uses. Each type of radiation may be chosen once, more than once... show full transcript

Worked Solution & Example Answer:1. Here are four uses of radioactivity - Edexcel - GCSE Physics - Question 1 - 2013 - Paper 1

Step 1

Draw a line from each one of them to the type of radiation it uses.

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Answer

sterilisation of medical equipment - alpha
household fire (smoke) alarm - beta
gauging thickness of cardboard - gamma
irradiating food - gamma.

Step 2

Which graph best shows how the activity of a radioactive isotope changes with time?

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Answer

The correct graph is B, which shows a decline in activity over time.

Step 3

Complete the sentence by putting a cross (✗) in the box next to your answer.

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Answer

The unit of activity of a radioactive isotope is the B - becquerel.

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1. Here are four uses of radioactivity - Edexcel - GCSE Physics - Question 1 - 2013 - Paper 1

Worked Solution & Example Answer:1. Here are four uses of radioactivity - Edexcel - GCSE Physics - Question 1 - 2013 - Paper 1

Draw a line from each one of them to the type of radiation it uses.

Which graph best shows how the activity of a radioactive isotope changes with time?

Complete the sentence by putting a cross (✗) in the box next to your answer.

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