Uses and dangers of radiation

Multiple Choice

Which of the following best describes the significance of understanding radioactive contamination and irradiation?

• It helps us use radioactive materials safely and effectively.

• It allows us to create more radioactive materials.

• It makes all radiation safe to handle without precautions.

• It eliminates the need for any safety measures.

Open Ended

What are some ways in which radioactive materials can be beneficially used in our daily lives or in industry?

Multiple Choice

Which of the following best describes the difference between radioactive contamination and irradiation?

• Contamination requires physical contact with radioactive atoms, irradiation does not.

• Irradiation requires physical contact with radioactive atoms, contamination does not.

• Both require physical contact with radioactive atoms.

• Neither requires physical contact with radioactive atoms.

Multiple Choice

What is the main purpose of the hazard symbol shown in the image?

• To warn people about radioactive materials

• To indicate food safety

• To show the presence of electricity

• To mark medical waste

Multiple Choice

Based on the image, what effect does irradiation have on strawberries after 15 days of storage?

• Irradiated strawberries spoil faster than non-irradiated ones.

• Irradiated strawberries remain fresher than non-irradiated ones.

• Both types of strawberries spoil at the same rate.

• Irradiation causes strawberries to rot immediately.

Open Ended

Explain how radioactive contamination can enter the human body and what possible health effects it may have.

Multiple Select

Which of the following are uses of medical tracers?

• Monitoring the functioning of internal organs

• Checking for blockages in blood vessels

• Treating bacterial infections

• Measuring average background radiation

Open Ended

Explain how radioactive tracers help in detecting blockages in blood flow within the body.

Multiple Choice

Why is it important for a radioactive tracer used in medical imaging to be weakly ionising and have a short half-life?

• To avoid damaging healthy cells and to ensure it does not remain in the body for long

• To make the scan faster

• To increase the amount of radiation detected

• To make the tracer visible to the naked eye

Multiple Select

Which of the following are uses of irradiation mentioned in the slides?

• Sterilising medical equipment

• Killing bacteria on food

• Treating cancer

• Detecting blockages in blood flow

Open Ended

Describe two possible effects on cells when they are exposed to radiation, as shown in the diagram.

Multiple Choice

Which of the following is NOT a use of radioactive materials?

• Irradiating food

• Sterilising surgical equipment

• Generating electricity from wind

• Medical imaging

Open Ended

What is one example of how radioactive material can be used usefully?

Multiple Select

Select all the correct statements about alpha radiation based on its use in smoke detectors.

• Alpha radiation is highly penetrating and dangerous in homes.

• Alpha radiation does not travel far in air.

• Alpha radiation does not penetrate skin.

• Alpha radiation is used because it is weakly penetrating.