| Questions
1. What particles are found in the nucleus of an atom?
- Protons and neutrons.
- Protons and electrons.
- Neutrons and electrons.
2. A teacher used a Geiger counter to measure the radiation
of a radioactive rock. Wrapping the rock in paper and aluminium foil had
no effect on the count rate. This tells us the rock emits:
- alpha radiation
- beta radiation
- gamma radiation.
3. Which type of radiation will penetrate paper and aluminium
foil, but not many centimetres of lead?
- Alpha.
- Beta.
- Gamma.
4. How can you change the rate of emission of radiation
from a radioactive object?
- Heat it up.
- Put it under pressure.
- You cannot change the rate of emission.
5. The half-life of an isotope is one hour. How long
will it take for the count rate to fall to a quarter of the starting rate?
- One hour.
- Two hours.
- Four hours.
6. What happens to the half-life of a substance when
it is put in a freezer?
- It slows down.
- It speeds up.
- It stays the same.
OCR: higher tier only
7. Isotopes of an element have different numbers of:
- protons
- electrons
- neutrons.
8. What happens when a nucleus splits?
- A chemical reaction occurs.
- Radiation is released.
- A bigger nucleus is formed.
Answers
1A, 2C, 3C, 4C, 5B, 6C, 7C, 8B
[ This page has been adapted from www.bbc.co.uk/schools/gcsebitesize/science
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