Question

Mikel’s teacher asks him to describe what happens to stars as they undergo nuclear fusion and process hydrogen into helium. What does Mikel say?

They become slower and more rectangular.

They become faster and more spherical.

They become cooler and lighter.

They become hotter and denser.

Answer 1

The accurate description of the fusion of hydrogen into helium is that the stars will become become hotter and denser.

Fusion reaction is a type of nuclear reaction in which small nuclei come together to form a larger nuclei with the evolution of energy. Usually the system becomes denser and hotter in the process.

Hence, when two hydrogen nuclei fuse to for helium in the stars, the stars become hotter and denser.

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