Stars and Solar System

What is the birthplace of a star?

• nebulae

• protostar

• main sequence

• supernova

During the main sequence of a star, what element is Hydrogen fusing into?

• Nitrogen

• Carbon

• Oxygen

• Helium

In what stage do stars spend most of their 'lives' in?

• protostar

• main sequence

• giant phase

• white dwarf

When does nuclear fusion occur?

• nebulae

• protostar

• main sequence

• supernova

What is happening in the 'giant' phase?

• expanding and heating up

• expanding and cooling

• contracting and heating up

• contracting and cooling

What do you call a dead star?

• white dwarf

• blue dwarf

• black hole

• black dwarf

What determines the route of a star's life cycle?

• size

• mass

• energy

• all of the above

What type of star is our Sun?

• small- mass star

• mid-sized star

• red giant

• massive star

In which stage are 90% of our stars?

• protostar

• giant

• main sequence

• white dwarf

What is a white dwarf?

• star in late stages that is cooling and dimming

• early stage star that is heating up and contracting

• small star that has high energy

• shooting starr