Radioactivity (continued 2)
Overview
The same radiation that lets doctors image a tumour or sterilise equipment can also damage living cells if it is not handled with care. Ionising radiation knocks electrons from atoms inside the body, harming cells, so working safely with radioactive sources is as important as knowing what they can do.
In this lesson you will state the effects of ionising nuclear radiation on living things, describe how radioactive materials are moved, used and stored safely, and explain the three core safety precautions: reducing the time of exposure, increasing the distance from the source, and using shielding to absorb the radiation.
Objectives
- State the effects of ionising nuclear radiations on living things, including cell death, mutations and cancer
- Describe how radioactive materials are moved, used and stored in a safe way
- [Supplement] Explain safety precautions for all ionising radiation in terms of reducing exposure time, increasing distance between source and living tissue and using shielding to absorb radiation
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Radioactivity (continued 2). Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Ionising radiation can damage living cells by causing A. cell death and mutations B. faster healing C. lower body temperature D. stronger bones Answer: A
- Which is NOT a recommended way to reduce exposure to a radioactive source? A. spending less time near it B. holding it closer to the body C. using shielding D. keeping a greater distance from it Answer: B
- Radioactive sources are usually transported in containers made of A. thin plastic B. cardboard C. thick lead D. glass Answer: C
- A worker wears a dose badge in order to A. block all radiation B. record the total radiation received C. emit safe radiation D. measure temperature Answer: B
- Which radiation is most dangerous if a source is swallowed? A. alpha B. beta C. gamma D. all are equally safe inside Answer: A
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Recommended Books
Further learning from open sources
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Textbook section
Biological Effects of Ionizing Radiation
We hear many seemingly contradictory things about the biological effects of ionizing radiation. It can cause cancer, burns, and hair loss, yet it is used to treat and even cure cancer. How do we understand these effects? Once again, there is an underlying simplicity in nature, even in complicated bi
"College Physics: Biological Effects of Ionizing Radiation" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/college-physics/pages/32-2-biological-effects-of-ionizing-radiation. Access for free at https://openstax.org/books/college-physics/pages/1-introduction
Published by other organisations under open licences, credited as they ask. Links open their websites.
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