Chapter 12 Lesson 3 Review

What is a nebula?

• A hot, dense, slowly cooling sphere of carbon

• A cloud of dust and gas

• The final stage of a star's life

• A type of galaxy

What forms when the densest parts of a nebula collapse?

• White dwarf

• Black hole

• Protostar

• Neutron star

What is the main sequence phase of a star?

• When a star is a protostar

• When a star fuses hydrogen and helium

• When a star becomes a black hole

• When a star is a white dwarf

Tags

NGSS.HS-ESS1-1

What happens when a star's hydrogen is nearly used up?

• It becomes a nebula

• It leaves the main sequence

• It becomes a protostar

• It becomes a planet

Tags

NGSS.HS-ESS1-1

What is a white dwarf?

• A hot, dense, slowly cooling sphere of carbon

• A cloud of dust and gas

• A type of galaxy

• A stage before a star becomes a protostar

Tags

NGSS.HS-ESS1-3

What causes the formation of a protostar?

• The explosion of a supernova

• The collapse of a nebula

• The cooling of a white dwarf

• The fusion of hydrogen and helium

What is the role of gravity in the formation of stars?

• It causes stars to explode

• It causes the densest parts of a nebula to collapse

• It cools down the star

• It turns a star into a black hole

What happens to the gas and dust around protostars over time?

• They form a black hole

• They heat up and get blown away

• They become a white dwarf

• They turn into a nebula

What is the significance of nuclear fusion in a protostar?

• It cools the protostar

• It marks the birth of a star

• It turns the protostar into a black hole

• It causes the protostar to explode

Tags

NGSS.HS-ESS1-1

What can some of the dust and gases blown away from protostars become?

• Black holes

• Planets or other objects that orbit the star

• White dwarfs

• Neutron stars