Life cycle of stars

Question 1

What is a nebula

Answer 1

cloud of dust and gases(hydrogen)

Question 2

How is a nebula formed

Answer 2

cloud and dust pulled together by gravity

Question 3

How is a protostar formed

Answer 3

nebula becomes denser, hydrogen becomes hotter as it spirals inwards

Question 4

When does fusion occur

Answer 4

protostar

Question 5

What happens during fusion and main sequence star

Answer 5

temps+pressures in centre of protostar become high enough to force hydrogen nuclei to to fuse tpgether and form helmium. this pressure in pushed outwards. gravity inwards

Question 6

What happens during red giant

Answer 6

fused most hydrogen into helium, core isn’t hot enough to withstand gravity + collapses

Question 7

What happens during white dwarf

Answer 7

star pulled together by gravity and collapses into white dwarf

Question 8

What happens after a super nova

Answer 8

out layers cast off gravity pulls in making a black hole or neutron star