How are stars classified?

• Color and temperature

• Temperature and brightness

• Brightness and color

• Temperature and color

The hottest stars are_______.

• white

• blue-white

• red

• blue

Which object in our solar system is a star?

• Moon

• Sun

• Meteor

• Sirius B

What is apparent brightness?

• The measure of how bright a star appears to an observer on Earth.

• How far away a star is from Earth.

• The brightness of a star.

• A measure of how bright the star would be if all stars were the same distance from Earth.

The Hertzsprung-Russell diagram plots the

• Absolute magnitude versus the apparent magnitude.

• Mass versus absolute magnitude.

• Luminosity versus surface temperature.

• Surface temperature versus mass.

Supergiants are ______.

• Very Dim.

• Always 500 times greater than our sun.

• Relatively cool in temperature.

• Very high in temperature.

Main sequence stars are...

• the majority of stars in the universe
• the stage when the star fuses Hydrogen into Helium
• neither is correct
• both are correct

A low mass main sequence star is...

• the size of our earth.
• 150 times bigger than our sun.
• like our sun.
• so dense not even light can escape it.

As the core of the red giant collapses it condenses into a super bright and dense star called...

• a brown dwarf.
• a red super giant.
• a white dwarf.
• a black hole.

Stars have a cycle similar to a life cycle, with steps and patterns.

• true
• false