Question

life cycle of stars. word bank: decrease, gas, high mass, red giant, nebula, main sequence, white dwarfs 18. all stars start as a ________________ ______________ star. 19. after fusing hydrogen to helium, a star will expand into a __________. 20. the mass of a star will continually ______________ over its lifetime. 21. only ______________ ______________ stars will supernova. 22. stars similar to our sun (and smaller) will not supernova and will become ______________ ______________ 23. all stars form from a cloud of __________ inside a ________________.

Explanation:

1. All stars begin as a main - sequence star.
2. After hydrogen - to - helium fusion, a star expands into a red giant.
3. A star's mass decreases over its lifetime due to fusion and mass loss.
4. Only high - mass stars will supernova.
5. Stars like the Sun and smaller become white dwarfs.
6. Stars form from a gas cloud inside a nebula.

Answer:

1. main sequence
2. red giant
3. decrease
4. high mass
5. white dwarfs
6. gas; nebula