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Study the word list: GCSE Physics: Radioactivity 3

Key words for GCSE Physics

	precaution	If you take a precaution, it means you do something to stop something dangerous from happening.
	irradiation	Exposing objects to nuclear radiation is called irradiation.
	chain	A chain reaction is when neutrons, released during fisson, cause frisson in other nuclei which cause more neutrons to be released.
	reaction	A chain reaction is when neutrons, released during fisson, cause frisson in other nuclei which cause more neutrons to be released.
	nuclear	Nuclear fusion is when two nuclei are joined together.
	fission	Nuclear fission is when an unstable nucleus is split.
	Becquerel	A Becquerel is a unit of activity.
	activity	The rate at which a source of unstable nuclei decays is known as its activity.
	count-rate	The number of decays recorded per second is the count-rate.
	background	Radiation in the environment is called background radiation.
	radiation	Radiation in the environment is called background radiation.
	spontaneous	If something is spontaneous, it means it happens without external stimulus.

Use the list: GCSE Physics: Radioactivity 3

Learn this spelling list using the 'Look, Say, Cover, Write, Check' activity.

Look	precaution
Say
Cover	Look again
Write
Check

Look, Say, Cover, Write, Check

How to use:

Look and read the word.

Say the word. Click the speaker icon.

Cover the word.

Write the word.

Check your spelling.

precaution

irradiation

chain

reaction

nuclear

fission

Becquerel

activity

count-rate

background

radiation

spontaneous

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Test yourself using the 'Listen and Spell' spelling test.

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If you take a __________, it means you do something to stop something dangerous from happening.

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