L6.2.11 Life Cycle of a Star Video

What do you already know about the life cycle of a star?

What is the initial stage of star formation, where a cloud of dust and hydrogen gas begins to spiral together due to gravity?

• Protostar

• Stellar Nebula

• Red Giant

• White Dwarf

What force counteracts the inward pull of gravity in a main sequence star, maintaining its stable state?

• Outward pressure from hydrogen fusion

• Outward pressure from helium fusion

• Inward pressure from helium fusion

• Inward pressure from hydrogen fusion

Up to which element can nuclear fusion occur in the core of a red giant star?

• Hydrogen

• Helium

• Iron

• Uranium

What extreme event is responsible for creating elements heavier than iron?

• The formation of a protostar

• The stable period of a main sequence star

• A supernova explosion

• The cooling of a black dwarf

Label the graphic organizer

a

b

c

d

e

f

black dwarf

white dwarf

black hole

supernova

protostar

planetary nebula