Physics life cycle of stars gcse
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13 Terms
life cycle of low mass star no detail
Nebula
Protostar
Main sequence star
Red giant
Planetary nebula
White dwarf
Black dwarf
life cycle of high mass star no detail
Nebula
Protostar
Main sequence star
Supergiant
Supernova
Lower mass - neutron star
Higher mass - black hole
nebula
huge cloud of hydrogen gas in space
protostar
both
cloud collapses due to gravity
huge friction creates heat + starts to glow
main sequence star
both
fuses hydrogen into helium
fuses for billions of years
red giant
low mass
core is too small + outer gas layer expands x 100
no more hydrogen to fuse so core starts to collapse + fuse helium
Planetary nebula
low mass
fusion stops and core contracts
outer layer of gas expelled in planetary nebula
white dwarf
low mass
dead core of star
stopped fusion but still super hot
black dwarf
low mass
cold remains of core
supergiant
high mass
Super heavy star runs out of hydrogen and starts to fuse all heavier elements up to iron
supernova
high mass
Supergiant has fused all elements up to iron + can no longer undergo fusion
star collapses in less than 1 second
shock wave as gas hits core in supernova explosion
neutron star
Smaller high mass star
crushed remains of core - super dense
black star
Highest mass stars
core is so dense that rules of physics break + nothing can break