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life cycle of stars
| Question | Answer |
|---|---|
| what characteristic of a star determines its life cycle? | its mass |
| what process allows stars to give off light and heat? | nuclear fusion |
| Why do you think massive stars have a shorter life cycle than average mass stars? | bigger stars use up their fuel faster |
| why does the sun not explode at any point in its life cycle | our sun doesn't have high mass |
| final stages in the life cycle of the sun | nebula protostar main sequence -red giant -red supergiant -planetary nebula -supernova -white dwarf -neutron star - black hole -black dwarf |
| describe a star | huge burning sphere of gases held together by gravity composed mainly of elements - hydrogen, helium life cycle based on their mass, # of atoms |
| What 3 life cycle stages do all stars go through? | Nebula (huge cloud of dust and gas held together by gravity; star nursery), protostar (young star in formation; nuclear fusion begins), main sequence (90% of stars are in this stage) |
| stars with an average mass like the sun | red giant, planetary nebula, white dwarf, black dwarf |
| stars that 1.5X - 3X more massive than the sun | red supergiant, supernova, neutron star |
| stars more than 3X as massive as the sun | red supergiant, supernova, black hole |
Created by:
hollydraper
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