1
Q
Radioactivity
A
the release of high-energy particles and rays of
energy from a substance as a result of changes in the nuclei of its atoms.
2
Q
natural background radiation
A
The stream of high-energy, fast-moving particles or waves that is
found in our environment
3
Q
Radiation
A
o high-energy rays and particles emitted by
radioactive sources.
4
Q
Light
A
one form of radiation that is visible to humans
5
Q
Isotopes
A
different atoms of a particular element that have the
same number of protons but different numbers of neutrons
6
Q
nuclear symbol.
A
standard atmoic symbol
