Ch. 4 Review

Front

What is a supernova?

Back

A supernova is a powerful and luminous explosion of a star, marking the end of its life cycle.

Front

What is left behind after a supernova explosion?

Back

Neutron star or black hole.

Front

What is a mid-ocean ridge?

Back

A mid-ocean ridge is an underwater mountain range formed by plate tectonics at a divergent boundary between two oceanic plates.

Front

What happens at a divergent boundary?

Back

At a divergent boundary, tectonic plates move apart, leading to the formation of new crust, such as mid-ocean ridges.

Front

What is the process by which main sequence stars like the sun generate energy?

Back

Fusion of hydrogen into helium.

Front

What is the significance of the Hertzsprung-Russell diagram?

Back

The Hertzsprung-Russell diagram is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

What occurs as we move to the left on the Hertzsprung-Russell diagram?

Back

Stars get hotter.

Front

What is a neutron star?

Back

A neutron star is the remnants of a supernova explosion, composed mostly of neutrons, and is incredibly dense.

Front

What is a black hole?

Back

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

Front

What are the seasons in the Northern Hemisphere during position B?

Back

Northern Hemisphere (Fall)/ Southern Hemisphere (Spring).