Answer:
A reaction that joins the nuclei of two atoms into one
Explanation:
Think of the words "nuclear fusion".
Nuclear = "relating to a nucleus"
Fusion = "joining"
So, nuclear fusion is the joining of two nuclei into one.
A and B are wrong, because chemical reactions involve electrons.
D is wrong, because the splitting of a nucleus is fission.
Volumes.
If you put equivalent volumes in a bag, where both weigh the same, the density might get equal.
Hope it helped,
Happy homework/ study/ exam!
Analytical balance is your answer
I believe the answer is D, Cells get energy by taking in nutrients from food. Correct me if I'm wrong.
Weathering causes the granite to break down into small particles - sand. The sand becomes buried and compacts into sandstone. If the sandstone continues to be buried and comes into close contact with high heat, such as magma, it can be turned into quartzite.