Which is the first stage in the life cycle of a massive star?
nebula
nebula
red giant
red giant
white drawf
white drawf
black hole
nebula
Select the correct answer from the list.(1 point)
As a star's size increases, its luminosity
. As a star's temperature
, its luminosity increases.
As a star's size increases, its luminosity increases.
As a star's temperature , its luminosity increases.
does it decrease or increase?
As a star's temperature increases, its luminosity increases.
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.
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.
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 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
solid
solid
gas
gas
plasma
plasma
liquid
plasma
Which describe the study of spectroscopy? Select the two correct answers.(1 point)
Responses
the number of galaxies
the number of galaxies
interaction of light and atoms
interaction of light and atoms
emission and absorption of light
emission and absorption of light
reflection of light by Earth