Nuclear fusion
2 marks · EasyDescribe what happens during nuclear fusion in stars.
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Small nuclei combine to form a larger nucleus, releasing energy.
Also accept: Two light nuclei join to form a heavier nucleus and release energy.; Hydrogen nuclei fuse to make helium, releasing energy.
Common mistakes: Nuclei split to form smaller nuclei (confusing with fission)
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Marking points
B1 · 1 mark · States that small/light nuclei join or fuse to make a larger/heavier nucleus.
B2 · 1 mark · States that energy is released during/after the process.
Worked solution
During nuclear fusion in stars, small nuclei such as hydrogen join together to form a larger nucleus (such as helium), and energy is released in the process.