Life Cycle of a Star and Galaxies

The longest period of a star’s life is called...

• The birth of a star

• Nebula

• Neutron star

• Main Sequence

Gravity pulls gases and dust particles in space toward one another, squeezing them into a smaller and smaller space. The temperature at the center rises and will eventually lead to nuclear fusion of hydrogen.

What stage in a stars life cycle is this describing?

• The birth of a star

• The death of a star

• Black Hole

• Stellar Nebula

Hotter stars appear to be what color? 

• Red
• Blue
• Yellow
• Green

Cooler stars appear to be what color? 

• Red
• Blue
• Yellow
• Green

What determines the color of a star? 

• It's size
• It's temperature
• It's composition
• They are all the same color 

A star at the stage in its life cycle when it stops burning hydrogen, begins burning bigger elements, and grows much bigger to a large, low-density star.

What stage in the life cycle does this describe?

• Supernova

• Black Hole

• Main Sequence

• Red Giant or Red Supergiant

What fuel do stars use? 

• Oxygen
• Hydrogen
• Carbon
• Iron

In a large mass star, the temperature reaches more than 100 billion degrees. The repulsive forces between the iron nuclei cause a massive explosion sending the star’s mass into space in a ....

• Nebula

• Black Hole

• Supernova

• Neutron star

Larger stars (stars with more mass) have a longer life cycle. 

• True
• False

A relatively small, dense star at the end of its life cycle, which generates little energy creating a faint white light and has contracted to its densest state.

What stage in the life cycle does this describe?

• Black Hole

• Nebula

• White Dwarf

• Red Giant