The term you're referring to which scientists implement to describe "different forms of life on Earth" is perhaps "Organism".
Radiation. Have a nice day.
Answer:
Got my points deducted by a loser name PoeticAesthetics
Explanation:
The control group is the part of an experiment that does not receive the variable and is used for comparison.
Radioactive decay occurs when an atom has either to many or to few neutrons and becomes unstable and start to emit radio active radioactive radiation and the atom start to decompose.
At the end two things can happen either the atom will transform in a new element with a lower atomic # and atomic mass # or the remaining neutron will transform into an electron and be on its own way
