The larger the protostar mass, the ______ its protostar phase will last.*1 pointshorterlonger

Protostars two to eight times the mass of the sun become...*1 pointLow mass starsIntermediate mass starsHigh mass starsBrown dwarfs

Approximately how long does the protostar phase last?*1 point1000's of years1,000,000's of years1,000,000,000's of years

match the following stages of the cycle of a high mass star*7 pointsA B C D E F Gblack hole supernova pulsar the place where globules form protostar main sequence star supergiant black hole supernova pulsar the place where globules form protostar main sequence star supergiant

When a star's inward gravity and outward pressure are balanced, the star is said to beGroup of answer choicesin hydrostatic equilibrium.a stage 2 protostar.in gravitational collapse.in thermal expansion.in rotational equilibrium.

Which of the following is the last stage of a star having 20% of the sun's mass?*5 pointsHelium white dwarfCarbon-oxygen white dwarfBlack dwarfSnow white dwarfNone of the above