HR Diagram

HR Diagram

Classification of Stars

Copy these vocabulary words and definitions into your notes

• Spectral Class: Determines the color of a star

• Luminosity: measures the brightness of a star

• HR Diagram: used to classify stars by their temperature, color and luminosity

Multiple Choice

Which star has the lowest temperature?

• A
• B
• C
• D

Multiple Choice

Look at the H-R diagram. Which star is
sort of cool, dim (not too much light), and red?

• Betelguse
• Sirius B
• Procyon B
• Barnard's star

Multiple Choice

Blue stars are the _____________.

• hottest
• coolest
• smallest

Multiple Choice

Which category is our Sun located in?

• White Dwarfs
• Supergiants
• Main Sequence
• Giants

Multiple Choice

Which star is the coldest?

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

Multiple Choice

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

• Stars Get Larger

• Stars get Colder

• Stars get hotter