Catalysts speed up reactions.
Answer:
Independent variable: The amount of fertilizer.
Dependent Variable : The amount of water, the amount of soil. amount of sun light.
Explanation:
I can't really explain it but I am pretty sure that is the right answer. Hope it helps :)
Answer:
sorry if it's a bit messy, hope it helps
Answer:
They used to extract iron ore from this site.
Explanation: