Per. 8 Quiz #10 "Stars"

How do astronomers study stars, which are too far away to visit? 

• They study the temperature of the star. 
• They study the starlight. 
• They study the elements found on the star. 

How do astronomers determine the temperature of stars?  

• By their size 
• By their color 
• By their distance from earth 

True or False: Red stars are the hottest and blue stars are the coolest.  

• True 
• False

What tool do astronomers use to study the light from stars?

• A microscope 
• A satellite 
• A spectroscope 

What does a spectroscope do to light? 

• It separates a star's light into a spectrum. 
• I determines the size and distance of the star's light. 

How are stars classified? 

• By their temperature 
• By their brightness 
• By their size 
• All of the above 

What is apparent magnitude? 

• The brightness of a star from Earth. 
• The brightness of a star determined by it's apparent magnitude and the distance. 

Fill in the blanks: Because stars are so far away, astronomers use a unit called the _________  _________, to measure the distance from Earth to the stars. 

• Kilo-meter
• Light-year

Identify the stage, in a star's life cycle, in which a star is born. 

• White Dwarf Stage
• Protostars Stage 
• Main-Sequence Stars Stage

What causes the birth of a star?

• Gravity pulling dust and gas towards the center of the star. 
• The temperature of the star pulling gas and dust towards the center of the star.