Nuclear Fusion Stars Flashcards
What’s the first stage of a stars life cycle
Protostar
What’s the second stage of a stars life cycle
Main (stable) sequence star
When the stars life cycle splits they can either be super red giant or a
Red giant star
After the red giant star it becomes what
White dwarf
After the white dwarf stage the comes next
Black dwarf
What’s the next stage after the red super giant star
Supernova
After the supernova the next two stages are either a …..…………….or a …..……………
Either neutron star or a black hole
What stage is the sun in at the moment
Main sequence star (stable)
Stars about the same size as our sun start out as a
Red giant star
Stars about the same size as our sun end As a
Black dwarf
Stars that are bigger than our sun start out as a
Red super giant star
Stars that are much bigger than our sun end As a …..…………… or a …..……………
Neutron star or black hole
Stars about the same size as our sun that are main sequence star and then red giant stars and then …..……………Black dwarf
White dwarf
Stars bigger than our sun are main sequence stars then red supergiant stars and then …..…………… and then neutron star or black hole
Supernova
…..…………… Pulls dust and gas together
Gravity
Stars form from massive clouds of …..……………
Gas and dust
stars form when it is hot enough for
Nuclear reactions to start
Nuclear reactions releases energy and keeps the star …..……………
Hot
During the main sequence stage stars are very stable because the
Forces are balanced
Forces making the star balanced are
Expanding gas pressure and the stars gravity
When a star has used up all its hydrogen in nuclear fusion it then
Makes other fusion reactions with all other elements up to iron
Heavy elements found in the sun and planets of the solar system suggest
That the Solar system was formed from supernovas in the past
The life cycle of a star dependeds on its
Size
Which stage are elements heavier than iron formed
Supernova
