Hazards of radiation (Physics only)

This lesson will contrast radioactive contamination and irradiation, explores on the hazards associated with radiation and how the risk depends on the half-lives of the isotopes. We will also explore the origin of background radiation and how we can measure the radiation dose that we receive over time.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.What is the best definition of 'activity'?

1/6

Q2.What is the best definition of 'half life'?

2/6

Q3.What is the best definition of 'count rate'?

3/6

Q4.What is activity measured in?

4/6

Q5.If a radioactive sample contained 1600 billion nuclei and its half life was 57 years, after how many years would there be 400 billion nuclei remaining?

5/6

Q6.A radioactive isotope has a half-life of 20 hours. How long will it take for 3/4 of the source to decay?

6/6

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.What is the best definition of 'activity'?

1/6

Q2.What is the best definition of 'half life'?

2/6

Q3.What is the best definition of 'count rate'?

3/6

Q4.What is activity measured in?

4/6

Q5.If a radioactive sample contained 1600 billion nuclei and its half life was 57 years, after how many years would there be 400 billion nuclei remaining?

5/6

Q6.A radioactive isotope has a half-life of 20 hours. How long will it take for 3/4 of the source to decay?

6/6

Video

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Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Hazards of Radiation (Physics only)

Use this quiz to see how well you have learnt about the Uses and Hazards of Radiation.

Q1.What is meant by 'background radiation'?

1/7

Q2.For the list of sources below, identify which percentage they each contribute to our annual background radiation dose.
Cosmic rays
Food
Nuclear power stations and weapons
Radon gas in the air

2/7

Q3.What does contamination mean?

3/7

Q4.What does irradiation mean?

4/7

Q5.Which of the statements below is correct?

5/7

Q6.Decide in which of the situations below contamination or irradiation would be taking place.
Measuring the thickness of paper using beta particles.
Smoke detectors using radiation which is blocked by smoke.
Using a radioactive isotope within a pipeline to find leaks.

6/7

Q7.Look at the precautions below - decide if they would be effective at preventing contamination or irradiation or neither.
Gloves
Lead shielding
Film radiation badge
Breathing mask
Keeping your distance from radioactive sources

7/7

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Hazards of Radiation (Physics only)

Use this quiz to see how well you have learnt about the Uses and Hazards of Radiation.

Q1.What is meant by 'background radiation'?

1/7

Q2.For the list of sources below, identify which percentage they each contribute to our annual background radiation dose.
Cosmic rays
Food
Nuclear power stations and weapons
Radon gas in the air

2/7

Q3.What does contamination mean?

3/7

Q4.What does irradiation mean?

4/7

Q5.Which of the statements below is correct?

5/7

Q6.Decide in which of the situations below contamination or irradiation would be taking place.
Measuring the thickness of paper using beta particles.
Smoke detectors using radiation which is blocked by smoke.
Using a radioactive isotope within a pipeline to find leaks.

6/7

Q7.Look at the precautions below - decide if they would be effective at preventing contamination or irradiation or neither.
Gloves
Lead shielding
Film radiation badge
Breathing mask
Keeping your distance from radioactive sources

7/7

Lesson summary: Hazards of radiation (Physics only)

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