Question

understanding main ideas
fill in each blank with the correct letter from the diagram.

1. red giant or supergiant
2. where fusion begins
3. part of a nebula
4. white dwarf, neutron star, or black hole
5. the stage the sun is in

fill in the blank.

1. how long a star lives and what it becomes at the end of its life depend primarily on its __________.

Explanation:

Step1: Recall star - life cycle stages

A nebula (A) is a cloud of gas and dust where stars are born. Fusion begins when a protostar (B) becomes hot and dense enough. The sun is in the main - sequence stage (C). A red - giant or super - giant is a later stage (D). A white dwarf, neutron star, or black hole is the final stage (E). The lifetime and end - state of a star depend on its mass.

Step2: Match stages to questions

1. Red giant or supergiant: D
2. Where fusion begins: B
3. Part of a nebula: A
4. White dwarf, neutron star, or black hole: E
5. The stage the sun is in: C
6. How long a star lives and what it becomes at the end of its life depend primarily on its mass.

Answer:

1. D
2. B
3. A
4. E
5. C
6. mass