Question

put the stages of the life span of the sun in order. nebula: stage 1 red giant: protostar: white dwarf: stage 5 main sequence:

Explanation:

Step1: Initial stage

The Sun starts as a nebula, a cloud of gas and dust.

Step2: Formation of protostar

Gravity causes the nebula to collapse, forming a protostar.

Step3: Main - sequence stage

Nuclear fusion starts in the protostar, and it enters the main - sequence stage where it spends most of its life.

Step4: Red - giant stage

When hydrogen fuel in the core is exhausted, the Sun expands into a red giant.

Step5: White - dwarf stage

After shedding its outer layers, the core remains as a white dwarf.

Answer:

nebula: Stage 1
protostar: Stage 2
main sequence: Stage 3
red giant: Stage 4
white dwarf: Stage 5