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.
They indicate a star's age.
Which of these is a heavy element in a star?(1 point)
Responses
hydrogen
hydrogen
carbon
carbon
helium
helium
lithium
carbon
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
main sequence
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
emission and absorption of light
interaction of light and atoms
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.
The Hertzsprung-Russell diagram plots stars according to their luminosity and temperature, which is also associated with spectral class.
Which state of matter best describes the elements inside stars?(1 point)
Responses
liquid
liquid
solid
solid
plasma
plasma
gas