Stellar Evolution Test Unit 6

Front

What is the final phase of our Sun's life cycle?

Back

white dwarf

Front

How does the main sequence lifetime of an O star compare with an M star?

Back

The main sequence lifetime of an O star is much shorter because the O star burns fuel at a much faster rate.

Front

What would NOT be observed around a black hole?

Back

Stars inside the event horizon.

Front

What is the first phase of a star's life cycle?

Back

The first phase is when a cloud of gas and dust starts to contract to form a protostar.

Front

What diagram is the modern theory of stellar evolution based on?

Back

H-R diagram.

Front

What is a protostar?

Back

A protostar is an early stage in the formation of a star, where a cloud of gas and dust begins to collapse under its own gravity.

Front

What is a white dwarf?

Back

A white dwarf is the remnant core of a star that has exhausted its nuclear fuel and shed its outer layers.

Front

What is a neutron star?

Back

A neutron star is the collapsed core of a massive star, composed almost entirely 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 is the significance of the H-R diagram in stellar evolution?

Back

The H-R diagram plots stars according to their luminosity and temperature, helping to illustrate the life cycles of stars.