Universe Check 4

Front

What color are the coolest stars on the H-R diagram?

Back

Red stars are the coolest stars on the H-R diagram.

Front

Which stars are the most massive according to the H-R diagram?

Back

Supergiants are the most massive stars according to the H-R diagram.

Front

What is one of the factors used to describe stars?

Back

Size is one of the factors used to describe stars.

Front

How does the size of stars vary?

Back

Stars vary greatly in size.

Front

Why do most bright stars observed at night appear brighter than other stars?

Back

They are closer to Earth.

Front

What is the H-R diagram?

Back

The H-R diagram is a graph that plots stars according to their brightness and temperature.

Front

What are White Dwarfs?

Back

White Dwarfs are small, dense stars that are the remnants of stars that have exhausted their nuclear fuel.

Front

What are Red Giants?

Back

Red Giants are large stars that have expanded and cooled after using up the hydrogen in their cores.

Front

What are Main Sequence Stars?

Back

Main Sequence Stars are stars that are in the stable phase of their life cycle, fusing hydrogen into helium.

Front

What is a Supergiant?

Back

Supergiants are among the largest and most luminous stars, often found at the top of the H-R diagram.