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6. Ionising radiation CANNOT be used for:
- Detecting diseases.
- Prevent UV rays.
- Sterilizing food.
- Treating cancer.
7. What is a half-life?
- The time taken for half of the radioactive nuclei present to decay.
- How long it will take for someone to die after contamination.
- The time taken to produce a radioactive material.
- How long it will take for half of the radioactive nuclei to die.
8. Static electricity is responsible for...
- Bad lighting.
- Bad hair days.
- Making friction.
- The balloons stretching when you blow into them.
9. The slope of a voltage-current graph shows...
- Resistance
- Cost of electricity
- Current
- Voltage
10. Which of these does nuclear power stations NOT use to get rid of radioactive material?
- Bury it in the ocean.
- Bury it in landfill sites.
- Seal it into concrete blocks.
- Sealed in glass and steel, then cooled for 50 years.
11. Why does air bags and crumple zones reduce the risk of injury?I
- It slowly reduces momentum.
- The amount of work given decreases.
- It heals you faster.
- They dial 999/911 in event of an incident.
12. Which of these is: The flow of charge around a circuit?
- Resistance
- Electrons
- Electric Current
- Voltage
13. How do you calculate momentum?
- Mass + Velocity
- Mass / Velocity
- Mass X Velocity
- Velocity/ Mass
14. Which type of radiation is slow and heavy?
15. Radioactive elements emit...
- Ionising radiation.
- Electromagnetic spectrums.
- Light rays.
- Low humming sounds.