1. Sources and Dangers of Radiation
Where does radiation come from? Are there any dangers?
Starter: all these foods have been treated with radiation.
Would you eat it?

2. Spelling test
New homework – complete definitions. Due Monday

3. Learning Outcomes
Compare the penetration of ionising properties of alpha, beta and gamma radiation.
Describe ways of reducing exposure to (and so risk from) alpha, beta and gamma radiation.

5. where is background radiation from?

6. What is a safe dose? Radiation is measured in Sieverts.
Usually we are exposed only to mSv (MilliSieverts) A usual dose is about 2.5mSv / year

8. Are you safe? Work out your dose !
Activity sheet.

10. Check point What type of radiation is absorbed by thin metal? 1) Alpha
2) Beta
3) Gamma

12. Contamination Vs Irradiation
Consider the relative dangers of the 3 types of ionising radiation if you ingest them. α Β ϒ
Consider the relative dangers of the 3 types of ionising radiation from outside you. α Β ϒ
How can you be contaminated/irradiated?

13. Dangers and uses of Radiation
Have you ever had an xray?
What happened?
Did the doctor stay in the room?
Why ?

14. Think – Pair – Share What are the dangers of radiation?

15. Isotope Kills Ex Spy

18. ACTIVITY Using the information provided
Construct a press release about nuclear radiation and the effect on Litvinenko.
Describe, in detail, alpha (α) radiation and its characteristics
Apply your knowledge of alpha (α) radiation to the Litvinenko. Explain briefly how he was affected and why.
Blooms Taxonomy
Level 2 – describe, explain
Level 3 – apply
Level 5 - construct
Level 6 - support