Period 8 Test Review

Front

What type of fusion does the sun complete before leaving the main sequence?

Back

Hydrogen to Helium (H to He)

Front

What happens to luminosity as the size of a star increases?

Back

Luminosity increases.

Front

True or False: The more black lines in a spectrum, the heavier the element and the more likely it is to be red shifting.

Back

False.

Front

What is the term for the point when a planet is farthest from the sun?

Back

Aphelion.

Front

What is nuclear fusion?

Back

Nuclear fusion is the process where two light atomic nuclei combine to form a heavier nucleus, releasing energy.

Front

What is the term for the point when a planet is closest to the sun?

Back

Perihelion.

Front

What is the relationship between a star's mass and its lifespan?

Back

More massive stars have shorter lifespans due to faster nuclear fusion rates.

Front

What is redshift?

Back

Redshift is the phenomenon where light from an object is shifted to longer wavelengths, indicating that the object is moving away from the observer.

Front

What is the main sequence in stellar evolution?

Back

The main sequence is a phase in a star's life where it fuses hydrogen into helium in its core.

Front

What is the significance of the Hertzsprung-Russell diagram?

Back

The Hertzsprung-Russell diagram plots stars according to their luminosity and temperature, helping to classify them.