List two observations that could be evidence of a chemical reaction.

1) Smell or odour

2) Colour change

Explanation:

1) Smell or odour

Example: Add HCl to a FeS solution. There will be a  strong odor of H2S

2) Colour change

Example : NaOH and KMnO4 solution to a river water sample. There will be  a colour change to brown.

my dad did alot of meth and ace cheeks

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.