Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. When is radiation around?
   • Background radiation is around us all of the time.
2. Where does Background radiation comes from?
   • Natural sources such as rocks and cosmic rays from space man-made sources such as the fallout from nuclear weapons testing and nuclear accidents.
3. How could the level of background radiation be affected?
   • The level of background radiation and radiation dose may be affected by occupation and/or location.
4. How is radiation dose measured?
   • Radiation dose is measured in sieverts (Sv)
5. What does 1000 millisieverts equal to?
   • 1000 millisieverts (mSv) = 1 sievert (Sv)
6. What is the unit for a radiation dose?
   • "sievert" (Sv)
7. How can nuclear radiation be used in medicine?
   • Nuclear radiations are used in medicine for the: exploration of internal organs control or destruction of unwanted tissue.
8. How can nuclear radiation be used in medicine?
   • Nuclear radiations are used in medicine for the: exploration of internal organs control or destruction of unwanted tissue.
9. How can nuclear radiation be used in medicine?
   • Nuclear radiations are used in medicine for the: exploration of internal organs control or destruction of unwanted tissue.
10. What are the perceived risks of using nuclear radiation?
    • Can cause mutations in DNA and the uncontrolled division of Cells. This can cause benign and malignant tumours.
11. What are the half-lifes of radioactive isotopes?
    • Radioactive isotopes have a very wide range of half-life values
12. Why does the hazard associated with radioactive material differ according to the half-life involved?
    • The longer the half life the higher the hazard as the longer the time needed for the radiation to reach normal levels.