Checkpoint 3

Front

What is an irregular galaxy?

Back

An irregular galaxy is a type of galaxy that does not have a distinct regular shape, often characterized by chaotic appearances and active star formation.

Front

What is a spiral galaxy?

Back

A spiral galaxy is a type of galaxy characterized by its spiral arms that wind outward from the center, often containing a large amount of gas and dust, and is known for active star formation.

Front

What is an elliptical galaxy?

Back

An elliptical galaxy is a type of galaxy that has an ellipsoidal shape and lacks the distinct features of spiral galaxies, typically containing older stars and little gas and dust.

Front

What are convergent plate boundaries?

Back

Convergent plate boundaries occur when two tectonic plates move toward each other, often resulting in one plate being forced beneath another, leading to geological phenomena such as earthquakes and mountain formation.

Front

What type of galaxy is most likely to have active star formation?

Back

Spiral galaxies are most likely to have active star formation due to their abundant gas and dust.

Front

What is the main characteristic of a lenticular galaxy?

Back

A lenticular galaxy is a type of galaxy that has a central bulge and a disk but lacks the prominent spiral arms found in spiral galaxies.

Front

What is the difference between active and passive galaxies?

Back

Active galaxies have high levels of star formation and often contain supermassive black holes, while passive galaxies have little to no star formation and consist mainly of older stars.

Front

What is the significance of the Hubble classification scheme?

Back

The Hubble classification scheme categorizes galaxies into different types based on their shapes and structures, helping astronomers understand their formation and evolution.

Front

What is a quasar?

Back

A quasar is an extremely luminous and active galactic nucleus powered by a supermassive black hole, often found in the early universe.

Front

What happens at divergent plate boundaries?

Back

At divergent plate boundaries, tectonic plates move apart from each other, leading to the formation of new crust, often seen at mid-ocean ridges.