Astrophysics Review

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

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 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

NGSS.HS-PS1-8

What stage of the life cycle of a star is this? 

• Main Sequence
• Red Giant
• Black Hole
• Neutron star

The life cycles of stars are determined by their:

• mass (size)
• color
• distance from Earth
• luminosity

______ is a force that causes dust particles to stick together in a nebula.

• nuclear fusion
• gravity
• hydrogen
• friction

This type of reaction occurs when light nuclei combine to form a larger, single nucleus.

• Fission
• Fusion
• single displacement
• double displacement