H-R diagram

The H-R diagram classifies stars based on what factors?

• Temperature and luminosity

• Number of planets

• What constellation they're in

• Temperature and fusion

Our sun is what kind of star?

• Blue giant

• Red giant

• Main sequence

• White dwarf

Compared to a red giant star, a blue supergiant is...

• Hotter and brighter

• Hotter and not as bright

• Colder and brighter

• Colder and not as bright

Compared to a white dwarf, a red supergiant is...

• Hotter and brighter

• Hotter and not as bright

• Colder and brighter

• Colder and not as bright

Our sun is yellow. A star colder than our sun would be...

• Red

• Yellow

• White

• Blue

Stars that are brighter are usually...

• Hotter

• Bigger

• More massive

• Smaller

Which star is more massive, a blue giant or a red dwarf?

• Blue giant

• Red dwarf

In the diagram given, what happens as we move to the left?

• Stars Get Larger
• Stars get Colder
• Stars get hotter

Which of these stars is hottest?

• Red Star
• Yellow Star
• Orange Star
• Blue Star

Which star is the coldest?

• Yellow Star
• Red Star
• Orange Star
• Blue Star