3 chemical changes in your everyday life?

Question

i need help!

i have chemistry homework that calls for 3 chemical changes in your daily life. i dont really care if its in your body or not, but i need 3 everyday life chemical changes!

please help!

thanks :)

Answer 1

cooking

digestion

combustion

Answer 2

H20(l) <---> H2O(g)

NaCl(s) <---> Na+(aq) + Cl-(aq)

O(g) + O2(g) <---> O3(g)