14.1 How do stars begin? Flashcards
1
Q
What stage is the 1st stage of the life cycle of a star/
A
being a stellar nebula
2
Q
What happens to a stellar nebula ?
A
under gravitational forces these dense clouds collapse, the lost in gravitational potential means particles gain kinetic energy
3
Q
What is a stellar nebula
A
Cloud of dust and gas(hydrogen and helium), (mostly comes from previous stars from supernova stage)
4
Q
What happens after the collapse of a nebula
A
particles keep colliding but more often and violently making gas hotter until ionised hydrogen atoms undergo nuclear fusion at high temperatures
5
Q
What is another name for nuclear fusion?
A
nuclear synthesis
6
Q
What is the change in energies during the birth of the star? nebula — protostar —- MSS
A
GPE to kinetic to nuclear to electromagnetic wave energy
