1. Life Cycle of Stars 4-3
The Life cycle of a star depends upon the size (Mass) of the star.
Our Sun is an Average size Star.

2. Stages of a Star’s Life Nebula: Cloud of Gas and Dust
Gravity pulls together

3. Protostar Birth of a Star( The Beginning): Protostar Fusion begins
Gravity causes hydrogen fusion

4. Main Sequence A Star is born
Fusion of hydrogen in the core of the star.
Gravity = Fusion A stable star

5. Giant or Super Giant Fusion Greater than Gravity
Average Star: Giant Massive: Super Giant
(Super-Nova for the largest Stars)

6. Dwarf, Neutron or Blackhole
Fusion ends – Gravity takes over
Average Stars: White Dwarfs
Largest Stars:
Neutron stars
Black Holes

9. Star Types

10. Star Classes
Big, Bright, Hot
O B A F G K M Small, Dim, Cool