Astronomy: Stellar Evolution

What is the first stage in the life cycle of any star?

• Main Sequence

• Nebula (Interstellar Cloud)

• Protostar

• Neutron Star

In what stage of life is our Sun in right now?

• Yellow Pulsating Giant

• White Dwarf

• Yellow Giant

• Main Sequence

In which stage does a star first reach hydrostatic equilibrium?

• Main Sequence

• Protostar

• Yellow Pulsating Giant

• White Dwarf

Tags

NGSS.HS-ESS1-1

How are the temperature and mass of main sequence stars related?

• There is no relationship between these two characteristics

• High mass stars are hotter

• Low mass stars are hotter

How are the mass and lifespan of main sequence stars related?

• There is no relationship between these two characteristics

• High mass stars last longer

• Low mass stars last longer

A nebula is made primarily of

• Helium

• Hydrogen

• Aargon

• Carbon

A protostar begins to heat up due to:

• gravitational contraction

• thermal expansion

• chemical reactions

• reflection of radiation

Hydrogen fusing into Helium is the main source of energy in this stage of a stars life?

• Nebula

• Main Sequence

• White Dwarf

• Protostar

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

A protostar is a part of the life cycle of:

• Large mass stars only

• Low mass stars only

• Both large and low mass stars

The red giant stages 1 and 2 are part of the life cycle of:

• Large mass stars only

• Low mass stars only

• Both large and low mass stars