Life Cycle Of A Star Flashcards Preview

GCSE Physics - 4408 > Life Cycle Of A Star > Flashcards

Flashcards in Life Cycle Of A Star Deck (11):
1

How does the protostar become denser?

As the hydrogen atoms fuse together

2

Why do stars radiate energy?

Because of the fusion in their core

3

How long can the protostar stage last?

Billions of years

4

When does a star become main sequence or massive star?

When the inward gravity force equals the outward radiation (when the forces balances)

5

What happens to the star to become a red giant / supergiant?

It runs out of hydrogen to fuse and cools down turning red

6

What does a red giant / supergiant fuse?

Helium / other light elements into heavier ones

7

What happens to a mains sequence star when fusion in a star stops?

It contracts to form a white dwarf

8

What happens at the end of the white dwarf stage?

No more light is emitted and it forms a black dwarf

9

What happens to massage stars when fusion stops?

The stars outer layers are thrown into space (supernova)

10

What can come after a supernova?

The neutron core is left (neutron star) or if it's mass is large enough it becomes a black hole

11

What is the first stage of a star?

Where gravitational forces pull clouds of dust and gas together to form a protostar