Why are spectral lines useful in classifying stars?

Question

They indicate a star's age
They show the composition of a star
They show a star's location
They show the layers that make up a star

Answer 1

Spectral lines are useful in classifying stars because they show the composition of a star. Each star has a unique spectrum that corresponds to the elements present in its atmosphere. By analyzing the spectral lines, scientists can determine the chemical composition of a star, including the abundance of various elements. This information helps in categorizing stars into different spectral types and understanding their evolutionary stages.

Answer 2

Which of these is a heavy element in a star?
carbon
lithium
helium
hydrogen

Answer 3

Carbon is a heavy element in a star.

Answer 4

Which state of matter best describes the elements inside stars?(1 point)
solid
gas
liquid
plasma

Answer 5

Plasma best describes the state of matter for the elements inside stars.

Answer 6

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