P4 - Radiation for life

3. The driving force that pushes electrons around a circuit .
5. This is used to measure the current through a component in a circuit.
10. Nuclear fusion involves joining 2 atomic nuclei to make a large nucleus.
13. Ionising living cells can damage them an cause this.
14. The flow of electrical charge/electrons around a circuit.
16. Anything in a circuit that slows down the flow of electrons.
17. The time taken for half the radioactive nuclei to decay.
19. In these types of waves, the vibrations are at 90 degrees to the direction of the wave.
21. This is used to measure the voltage across a component in a circuit.
23. The technique dating materials such as rocks or carbon by measuring the amount of radioactive isotope in the sample.
24. Opposite charges attract, like charges …

1. Sound that has a higher frequency than humans can hear.
2. This type of resistor allows you to change the resistance.
4. The wire in a plug which is designed to prevent electric shocks and is coloured green/yellow.
6. Radiotherapy uses these types of rays to treat cancer.
7. In these types of waves, the vibrations are along the same direction as the wave is travelling.
8. These are used to detect leaks of radiation.
9. This is caused when two insulating materials are rubbed together, scraping electrons off one material and depositing them on the other.
11. The process of splitting atoms to release energy.
12. The wire in a plug which allows electricity to flow outwards and is coloured blue.
15. To prevent sparks from static electricity, fuel tankers must be …
18. The wire in a plug which carries voltage and is coloured brown.
20. Atoms with the same atomic number, but a different mass number.
22. A subatomic particle with a negative electrical charge.