iGCSE double award Radioactivity (Physics)

If radioactive waste is put into water, what will happen?
It will poison ecosystems
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Where is radioactive waste deposited?
Buried underground
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What is a medical risk of exposure to too much radiation?
Cancer (caused by mutations)
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What is the purpose of radiotherapy?
To kill cancerous cells
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What is a tracer?
A radioactive source which is put into a system to detect blockages
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What is radioactive dating?
Where a radioactive object is measured against the half life of carbon
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What is meant by the term 'half-life'
The time taken for radiation emitted by a source, to decrease by a half
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What is radiation measured in?
Bequerels
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What is radioactive dating used for?
Used by archaeologists to see how old something is
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How will a radioactive source vary with time?
It will decrease over time
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What does a geiger-muller device do?
It beeps in the presence of radiation. The more radiation, the more frequent the beeps
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What is the most common source of background radiation?
Radon gas from the ground
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What is gamma radiation?
An electromagnetic wave
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What is beta radiation?
A high speed electron
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How is the penetrating power of an alpha particle reduced?
With paper or air
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What is alpha radiation?
A helium nucleus
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How is the penetrating power of a beta particle reduced?
With 3mm of aluminium
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How is the penetrating power of a gamma particle reduced?
With a thick layer of lead
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What is the order of ionisation power from lowest to highest?
Gamma, Beta, Alpha
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What is the effect on the mass + atomic number on gamma on the nucleus?
No specific effect
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What is the effect on the mass + atomic number on alpha on the nucleus?
Atomic number goes down by 2
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What is the effect on the mass + atomic number on beta on the nucleus?
Atomic number increases by 1
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Other cards in this set

Card 2

Front

Where is radioactive waste deposited?

Back

Buried underground

Card 3

Front

What is a medical risk of exposure to too much radiation?

Back

Preview of the front of card 3

Card 4

Front

What is the purpose of radiotherapy?

Back

Preview of the front of card 4

Card 5

Front

What is a tracer?

Back

Preview of the front of card 5
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