Unit 4 Review Origin, Composition, & Forces of the Universe

Front

What element is not represented in a star's spectrum?

Back

Helium is not represented in the star's spectrum.

Front

What happens to the color of a star as its surface temperature increases?

Back

The color of the star changes.

Front

What does the Big Bang Theory explain about the universe?

Back

The Big Bang Theory explains the continual cooling and expansion of the Universe.

Front

What do stars change during nuclear fusion?

Back

Stars change hydrogen into helium during nuclear fusion.

Front

What type of space missions are most common?

Back

Most space missions are unmanned.

Front

What is the primary process that powers stars?

Back

Nuclear fusion is the primary process that powers stars.

Front

What is the H-R diagram used for?

Back

The H-R diagram is used to classify stars based on their luminosity and temperature.

Front

What is luminosity?

Back

Luminosity is the total amount of energy emitted by a star per unit time.

Front

What is the relationship between a star's temperature and its brightness?

Back

As a star's temperature increases, its brightness also increases.

Front

What are the main elements involved in stellar formation?

Back

The main elements involved in stellar formation are hydrogen and helium.