Question detail
Why do fusion reactions require very high temperatures?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Nuclear fission and fusion
Question
- A. To increase the mass of the nuclei
- B. To overcome electrostatic repulsion between nuclei
- C. To slow down the nuclei
- D. To cool the surrounding environment
Answer
The correct answer is B: To overcome electrostatic repulsion between nuclei.
Explanation
The correct answer is B: To overcome electrostatic repulsion between nuclei. This supports the learning objective "(Physics only) Explain that fusion is the energy source of stars." in Nuclear fusion (physics only) because it uses the correct atomic and nuclear radiation relationship for Nuclear fission and fusion. The other options are less suitable because they do not match the required Nuclear fusion (physics only) idea: To increase the mass of the nuclei; To slow down the nuclei; To cool the surrounding environment.
Common mistake
Misunderstanding Fusion as Fission
Students often confuse nuclear fusion with nuclear fission, thinking both processes are the same.
To fix this, students should focus on the definitions: nuclear fusion is the joining of two light nuclei to form a heavier nucleus, while nuclear fission is the splitting of a large unstable nucleus.
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