Question

Why are spectral lines useful in classifying stars?(1 point)
Responses

They show the composition of a star.
They show the composition of a star.

They show the layers that make up a star.
They show the layers that make up a star.

They show a star's location.
They show a star's location.

They indicate a star's age.
Answer
Which of these is a heavy element in a star?(1 point)
Responses

hydrogen
hydrogen

carbon
carbon

helium
helium

lithium
Answer
The Sun, like 80 to 90 percent of stars, is in which stage of life?(1 point)
Responses

red giant
red giant

main sequence
main sequence

stellar formation
stellar formation

dying star
Answer
Which describe the study of spectroscopy? Select the two correct answers.(1 point)
Responses

the number of galaxies
the number of galaxies

emission and absorption of light
emission and absorption of light

reflection of light by Earth
reflection of light by Earth

interaction of light and atoms
Answer
Which statement correctly explains how the Hertzsprung-Russell diagram helps to compare stars?(1 point)
Responses

The Hertzsprung-Russell diagram plots stars according to their size and shape.
The Hertzsprung-Russell diagram plots stars according to their size and shape.

Stars with the highest temperatures appear towards the right side of the Hertzsprung-Russell diagram.
Stars with the highest temperatures appear towards the right side of the Hertzsprung-Russell diagram.

The Hertzsprung-Russell diagram plots stars according to their luminosity and temperature, which is also associated with spectral class.
The Hertzsprung-Russell diagram plots stars according to their luminosity and temperature, which is also associated with spectral class.

The Sun's high temperature places it to the far left of the Hertzsprung-Russell diagram.
The Sun's high temperature places it to the far left of the Hertzsprung-Russell diagram.
Answer
Which state of matter best describes the elements inside stars?(1 point)
Responses

liquid
liquid

solid
solid

plasma
plasma

gas
Answered by GPT 3.5
They indicate a star's age.
Answered by GPT 3.5
carbon
Answered by GPT 3.5
main sequence
Answered by GPT 3.5
emission and absorption of light
interaction of light and atoms
Answered by GPT 3.5
The Hertzsprung-Russell diagram plots stars according to their luminosity and temperature, which is also associated with spectral class.
Answered by GPT 3.5
plasma