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7. What does the 'm' mean in E=mc2
- Total mass of Element
- Mass lost during fission
- Mass of atom
- Mass gained during fussion
8. On a paper thickness guage, what will happen to the radiation if the sheet becomes thicker?
- It will emit gamma radiation
- It will decay
- It will decrease
- It will increase
9. What is the weight of an Electron?
10. Why is food zapped with gamma last?
- So that there's no microorgansims
- So that other bacterium don't get in and multiply
- So that the person won't be exposed to radiation
- So that it decreases the chance of other microbes multiplying
11. What is the half-life of a radioisotope?
- The time taken for half of all the atoms to decay
- The time taken for the atoms to decay
- Half of the time taken for the atoms to decay.
- The amount of half the radiation to decay.
12. Beta and Gamma are...
- More harmful than alpha
- Penetrating
- Highly penetrating
- Highly ionising
13. Radioactivity is...
- Stable
- Sometimes random, sometimes predictable
- Random
- Predictable
14. What range (in air) does Beta have?
15. What happens when a radioactive nucleus emits alpha or beta?
- The number of protons and neutrons changes
- The number of electrons changes
- It makes and new element
- It changes the amount of radioactivity in the atom
16. What do film badges do?
- Detects radiation
- Shield people who work with radiation
- Monitor radiation
- Treat radiation sickness
17. What does the activity of a radioactive sample depend on?
- The half-life of the element
- How unstable the nucleus is
- Number of unstable nuclei present
- The number of protons and neutrons in the nucleus
18. What do PET scans for active cancers detect?
- What type of cancer it is
- Increased Glucose
- Starch
- Gamma radiation
19. What triggers smoke alarms?
- Carbon particles turn the alpha source into a He atom
- Alpha turns into Carbon
- The Carbon particles fuse with Helium
- The alpha reacts with Carbon
20. What is gamma radiation?
- An electromagnetic wave
- An isotope
- An ionising wave
- A radioactive atom