The two correct answers are:
1. Interaction of light and atoms.
2. Emission and absorption of light.
interaction of light and atoms
reflection of light by Earth
emission and absorption of light
the number of galaxies
1. Interaction of light and atoms.
2. Emission and absorption of light.
nebula
black hole
white drawf
red giant
(1 point)
white dwarf
supernova
red giant
stellar nebula
dying star
stellar formation
red giant
main sequence
A graph illustrates the relationship between the luminosity (Sun = 1), ranging from 0.0001 to 10000, and temperature in Kelvin, ranging from 30000 to 3000, for various stars classifications. Main sequence stars extend diagonally from the top left to the bottom right corner of the graph. The White Dwarfs, Giants, and Super Giants are placed on the graph according to their luminosity and temperature.
Which spectral class would a star fit into if it had a surface temperature of 20,000 K?
(1 point)
Responses
A
O
B
F
gas
solid
liquid
plasma
Stars with the highest temperatures appear towards the right side of the Hertzsprung-Russell diagram.
The Hertzsprung-Russell diagram plots stars according to their size and shape.
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.
white light from the sun and microwaves
white light from a lightbulb and rainbows
radio waves and ultraviolet light
rainbows and X-rays
They indicate a star's age.
They show the layers that make up a star.
They show the composition of a star.
They show a star's location.
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 increases, its luminosity increases.
helium
carbon
hydrogen
lithium