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P6: Quiz 10 – Answers
P6: Quiz 10 – Answers
1)
a) Radio waves
b) Gamma rays
c) The danger increases as EM waves with shorter wavelengths and higher frequencies transfer more energy
d) No – there are no known damaging effects of radio waves
2)
a) Ionising means that these waves can add or remove electrons from molecules, resulting in the molecules becoming electrically charged (ions)
b) Any two from skin cancer, sun burn, aging of skin and eye damage
c) Cancer
3)
a) Sieverts (Sv) or millisieverts (mSv)
b) We need to think about radiation dose because X-rays and gamma rays can cause cells to ionise, which can cause cancer
c) We need to consider the benefits and costs of the medical procedure, and see if there are any alternative procedures that have a lower cost (a lower negative affect on the body)
a) Radio waves
b) Gamma rays
c) The danger increases as EM waves with shorter wavelengths and higher frequencies transfer more energy
d) No – there are no known damaging effects of radio waves
2)
a) Ionising means that these waves can add or remove electrons from molecules, resulting in the molecules becoming electrically charged (ions)
b) Any two from skin cancer, sun burn, aging of skin and eye damage
c) Cancer
3)
a) Sieverts (Sv) or millisieverts (mSv)
b) We need to think about radiation dose because X-rays and gamma rays can cause cells to ionise, which can cause cancer
c) We need to consider the benefits and costs of the medical procedure, and see if there are any alternative procedures that have a lower cost (a lower negative affect on the body)
Questions
1)
a) Which part of the EM spectrum has both the longest wavelength and the lowest frequency?
b) Which part of the EM spectrum has both the shortest wavelength and the highest frequency?
c) Do the dangers of the waves in the EM spectrum increase or decrease as the wavelengths get shorter/ frequencies increase? Explain your answer.
d) Are there any known harmful effects of radio waves?
2)
a) Ultraviolet radiation, X-rays and gamma rays are all types of ionising radiation. What does ionising mean?
b) Give two damaging effects of ultraviolet radiation.
c) Give one damaging effect of X-rays and gamma rays.
3)
a) What units are used to measure radiation dose?
b) Why do doctors need to think about radiation dose when carrying out medical procedures that use X-rays and gamma rays?
c) Whenever doctors are thinking about carrying out a medical procedure that uses gamma rays or X-rays, what do they need to consider with respect to the radiation dose?
1)
a) Which part of the EM spectrum has both the longest wavelength and the lowest frequency?
b) Which part of the EM spectrum has both the shortest wavelength and the highest frequency?
c) Do the dangers of the waves in the EM spectrum increase or decrease as the wavelengths get shorter/ frequencies increase? Explain your answer.
d) Are there any known harmful effects of radio waves?
2)
a) Ultraviolet radiation, X-rays and gamma rays are all types of ionising radiation. What does ionising mean?
b) Give two damaging effects of ultraviolet radiation.
c) Give one damaging effect of X-rays and gamma rays.
3)
a) What units are used to measure radiation dose?
b) Why do doctors need to think about radiation dose when carrying out medical procedures that use X-rays and gamma rays?
c) Whenever doctors are thinking about carrying out a medical procedure that uses gamma rays or X-rays, what do they need to consider with respect to the radiation dose?