Second 9 Weeks Review

Front

What is a star?

Back

A sphere of matter with a density and temperature great enough to cause a nuclear reaction at its center.

Front

How does star E compare to star B?

Back

Star E is cooler and dimmer than star B.

Front

What type of boundary do Plates 8 and 10 represent?

Back

Convergent boundary.

Front

What is a nebula?

Back

A collection of dust and gases that forms stars or results from dying stars.

Front

What type of boundary do Plates 1 and 2 represent?

Back

Transform boundary.

Front

What is the process of nuclear fusion in stars?

Back

The process where hydrogen atoms combine to form helium, releasing energy.

Front

What is the life cycle of a star?

Back

A star forms from a nebula, enters the main sequence, and can end as a white dwarf, neutron star, or black hole.

Front

What is the difference between a red giant and a white dwarf?

Back

A red giant is a large, luminous star in the late stages of stellar evolution, while a white dwarf is a small, dense remnant of a star that has exhausted its nuclear fuel.

Front

What is a black hole?

Back

A region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.

Front

What is the significance of the Hertzsprung-Russell diagram?

Back

It is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.