Stars life cycle

Question 1

1. Where are the stars created from?

Answer 1

nebula

Question 2

2. What does gravity do?

Answer 2

‘collapse’ a cloud of gas and dust

Question 3

3. What happens as the cloud compresses gas and dust?

Answer 3

– the centre temp increase

• Speed of rotation increases
• Density and pressure increases

Question 4

4. What happens when temp and pressure at centre reachers critical point?

Answer 4

nuclear fusion commences

Question 5

5. What happens to huge quantity of energy?

Answer 5

radiate outwards, balancing the inward pull of gravity.

Question 6

6. What happens in medium - small stars?

Answer 6

continues in this equilibrium for billions of years: the solar systems forms as the start of this stage

Question 7

7. What happens when all hydrogen is used up?

Answer 7

collapse restarts

Question 8

8. What happens at much higer core temp?

Answer 8

fusion recommences, using helium