A. plate tectonics slowly move in what is called Continental Drift, the Earth used to be one continent called Pangea and has shifted ever since.
Answer:
C. water freezes (is the answer)
Answer: For safety
Explanation: One of the biggest reason why the water we use are treated is so that it is safe for us to use.
There is 9.375 g of nitrogen. This is because when a half-life passes, the mass becomes 2 times less. Since two half-lives have passed, you need to divide by 4.
