p2 - space Flashcards
1
Q
life cycle of a star similar size or smaller than the sun
A
- starts as a cloud of dust and gas by gravity called a nebula
- forms a protostar
- fusion of hydrogen into helium begins
- main sequence star is formed
- expand to form a red giant
- temperature increases, outer layer expelled to form a white dwarf
- cools down to form a black dwarf
1
Q
A
2
Q
life cycle of a star with a greater mass than the sun
A
- nebula
- proto star
- main sequence star
- expand to form a red super giant
- explodes in a super nova
- will form either a hot, dense core canlled a neuron star
- or will collapse into a black hole
3
Q
A
4
Q
what describes the state of a main sequence star
A
the stable period when the inward pressure (caused by gravity) is equal to the outward pressure (caused by fusion)
