P2.5 - Stars v.2

What are stars formed from?

• Clouds of gases such hydrogen, and helium

• Solid rock and ice

• Water and air

• Metal and dust

What is a protostar?

• A fully formed star

• A cloud of gas and dust

• A star in its early formation stage

• A type of planet

In main sequence stars, what does hydrogen fuse to form?

• Carbon

• Iron

• Helium

• Oxygen

What happens to a low mass star when hydrogen fuel begins to run out?

• It becomes a Red giant

• It becomes a Supergiant

• It becomes a Black hole

• It becomes a Neutron star

What does a large mass star become when hydrogen fuel runs out?

• Red giant

• White dwarf

• Red supergiant

• Neutron star

What happens to a low mass star after it becomes a Red giant?

• It explodes in a supernova

• It shrinks to become a White dwarf

• It becomes a Black hole

• It becomes a Neutron star

What is the final stage of a large mass star?

• White dwarf

• Red giant

• Neutron star or Black hole

• Main sequence star

What increases in a star when helium begins to fuse into larger elements?

• Temperature

• Gas and radiation pressure

• Gravitational forces

• Luminosity

What is the H-R diagram used for?

• To present information about the stars' temperature, colour, mass and rate of collapse

• To present information about stars' size, temperature, colour, and luminosity

• To present information about the stars' density, distance from Earth and rotational speed

• To present information about the stars' chemical composition and gravitational field

What happens to a massive star after it's red supergiant phase?

• It becomes a black hole

• It becomes a White dwarf

• It explodes in a supernova

• It forms a new planet