Question

classification of stars

1. place the following stages of the life cycle of a star in order.

a the star begins to run out of fuel and expands into a red giant.
b a diffuse cloud of gas and dust drifting through space. a nebula forms when the pressure
and temperature inside the cloud begins to increase.
c the red giant ejects its outer layers and they expand and drift away leaving a white dwarf
d the temperature of the core increases and nuclear fusion begins.
e the force of gravity pulls a nebula together forming clumps called protostars
f an average main sequence star slowly burns its fuel

Explanation:

The life cycle of a star begins with a nebula (B), then protostars form (E), nuclear fusion starts as core temperature increases (D), the star is in the main - sequence stage (F), expands into a red giant (A), and finally ejects outer layers leaving a white dwarf (C).

Answer:

B, E, D, F, A, C