FCAT Grade 8 Science Assessment Practice Questions

Category - FCAT Science Assessment Grade 8

The reactions that provide energy and heat in the sun, or any star, are:
  1. Fusion reactions.
  2. Fissile reactions.
  3. Implosive reactions.
  4. Replacement reactions.
  5. Radioactive reactions.
Explanation
Answer: A - Stars are powered by the fusion of hydrogen into helium, which creates a massive amount of energy. The fusion of hydrogen in stars is possible due to the large mass of the star, which creates a very strong gravitational force.
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