Question

According to the nebular hypothesis, when did nuclear fusion begin?

a After the planets formed.

b When the sun was 5 billion years old.

c When the nebula first exploded outward into space.

d When particles were pulled together so tightly they combined.

Answer 1

Eliminate unreasonable answers.

Do you know what nuclear fusion is? It's what happens inside stars, and creates light.

Answer 2

so A is out then and b to

Answer 3

Yes, and if you have a vague idea of what causes fusion to occur, you should be able to decide now.

Think about where fusion occurs...

Answer 4

D :) When particles were pulled together so tightly they combined correct?

Answer 5

Well does fusion happen in places where particles are spread out, or close together?

Answer 6

Close together

Answer 7

Yep.

Answer 8

:)

Answer 9

Good job :)