Life cycle of a star

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 high enough for nuclear fusion of hydrogen to begin.
What stage in a stars life cycle is this describing? 

• The birth of a star
• The death of a star
• Black Hole
• Stellar Nebula

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

Hotter stars appear to be what color? 

• Red
• Blue
• Yellow
• Green

Cooler stars appear to be what color? 

• Red
• Blue
• Yellow
• Green

Tags

NGSS.MS-ESS1-1

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 helium, and expands 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

Tags

NGSS.HS-ESS1-1

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

• Nebula
• Black Hole
• Supernova
• Neutron star

Tags

NGSS.HS-ESS1-3

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 or no energy and has contracted to its densest state.
What stage in the life cycle does this describe? 

• Black Hole
• Nebula
• White Dwarf
• Red Giant

At what stage in a stars life cycle are elements heavier than iron form? 

• Red Giant
• Supernova
• Black Hole
• Main Sequence

Tags

NGSS.HS-ESS1-3