Answer:
Combining the two clear colorless liquids is a chemical change.
Explanation:
Because a different solid substance is formed. Tell students that a precipitate is an insoluble solid that forms when two solutions are combined and react chemically. Insoluble means that the solid will not dissolve.
Burning less fossil fuels and riding bikes or walking instead of cars.
Explanation:
I don't exactly know but probably so.
<span>These atoms are known as valence atoms.</span>