Question

20 what is the difference between nuclear fusion and nuclear fission?

Explanation:

Nuclear fusion combines light nuclei to release energy, like in the sun. Nuclear fission splits heavy nuclei, such as uranium - 235 in nuclear power plants. Fusion requires high temperatures and pressures, while fission can be controlled more easily in reactors.

Answer:

Nuclear fusion is the combination of light atomic nuclei to release energy (e.g., hydrogen nuclei combine in the sun), often requiring extremely high temperatures and pressures. Nuclear fission is the splitting of heavy atomic nuclei (e.g., uranium - 235 splitting in a nuclear reactor) to release energy, which can be more readily controlled in current technology for power - generation purposes.