Understanding Stars

What is a star made of?

• Hot, glowing gases

• Metal and dust

• Ice and rock

• Water and air

Where are baby stars formed?

• In a volcano

• In the ocean

• In a stellar nursery

• On the moon

What is a protostar?

• A kind of comet

• A hot core formed from collapsing gas and dust

• A small asteroid

• A type of planet

What happens when a star enters the main sequence?

• It stops shining

• It becomes a black hole

• It starts fusing hydrogen into helium

• It turns into a planet

What keeps a star from collapsing under its own gravity?

• Its rotation speed

• Its distance from Earth

• Pressure from its hot core

• Its magnetic field

What is a red giant?

• A type of galaxy

• A star that has expanded and cooled

• A planet with a red surface

• A comet with a red tail

What does a medium-sized star become after it sheds its outer layers?

• A neutron star

• A white dwarf

• A black hole

• A red supergiant

What is a black dwarf?

• A star that has stopped glowing

• A type of planet

• A small black hole

• A kind of asteroid

What causes a supernova?

• A star colliding with a planet

• A star moving too fast

• A star running out of fuel and exploding

• A star being hit by a comet

What can a massive star become after a supernova?

• A white dwarf

• A neutron star or a black hole

• A red giant

• A planet