Answer:
The correct matching of items have been properly done below
Explanation:
fire started without any help-sponteanous combustion
most dangerous radiation----- gamma rays
rusting -slow oxidation
product of acid plus base- salt
substances united in a reaction - reactants
. a reaction which takes in energy- endothermic
contains mineral salts - hard water
nuclei and free electrons- plasma phase
fueled by fusion- sun
