Physics- P4 Part B

1. The nucleus has to absorb a ... before splitting (7)
5. Two nuclei collide at high speed, ... together to create a larger, heavier nucleus (4)
6. They can ... the body and get to organs. Alpha can't ... the skin (9)
7. This is the splitting of large, unstable nucleus (7, 7)
8. Fusion releases a lot of ... (6)
9. This is treating cancer with radiation. Radiation kills the cells so its used for cancer treatment, However sometimes normal cells are damaged but its inevitable (12)

2. Higher doses kills cells ... causing radiation sickness (10)
3. ... are less damaging inside the body because they don't have a dangerous ionising power (4, 3, 5)
4. Inside the body ... are the most dangerous because they do damage in small areas. (5, 7)
10. ... Radiation is the low-level radiation ground us all the time and come from many sources (10)

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