If something is burned a reaction has occurred

true

Explanation:

When the reactants are heated, the average kinetic energy of the molecules increases. This means that more molecules are moving faster and hitting each other with more energy.

HOPE IT HELPS

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.

i'd have to say the answer is probable the second option "the geosphere interacting with the atmosphere"