No mountains in the world are increasing in size
Answer:
Second one
Explanation:
I think it's the second cause there's no energy w/o heat. So it's the second.
Reactant molecules are any substance that goes into a reaction. When forming product molecules, the reactant molecules combine and create a new molecule (i.e. the combination of methane and oxygen can make carbon dioxide and water).
I believe it becomes less dense, bc when you heat something it’s molecules spread further apart.
