Which statement correctly explains how the Hertzsprung-Russell diagram helps to compare stars?(1 point)
Responses
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.
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 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.
The Hertzsprung-Russell diagram plots stars according to their luminosity and temperature, which is also associated with spectral class.
Use the diagram to answer the question.
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.
In which spectral class does a white dwarf with a temperature of 10,000 K belong?
(1 point)
Responses
F
F
A
A
O
O
B
A white dwarf with a temperature of 10,000 K belongs to the spectral class A.
Why are spectral lines useful in classifying stars?(1 point)
Responses
They show a star's location.
They show a star's location.
They show the composition of a star.
They show the composition of a star.
They indicate a star's age.
They indicate a star's age.
They show the layers that make up a star.
Spectral lines are useful in classifying stars because they show the composition of a star.
Which describe the study of spectroscopy? Select the two correct answers.(1 point)
Responses
emission and absorption of light
emission and absorption of light
reflection of light by Earth
reflection of light by Earth
the number of galaxies
the number of galaxies
interaction of light and atoms
The correct answers are:
1. Emission and absorption of light
4. Interaction of light and atoms
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.
As a star's temperature increases, its luminosity increases.
Which is the first stage in the life cycle of a massive star?(1 point)
Responses
black hole
black hole
nebula
nebula
red giant
red giant
white drawf
The first stage in the life cycle of a massive star is a nebula.
Which of these is a heavy element in a star?(1 point)
Responses
helium
helium
hydrogen
hydrogen
lithium
lithium
carbon
Carbon is a heavy element in a star.
Which state of matter best describes the elements inside stars?(1 point)
Responses
liquid
liquid
gas
gas
solid
solid
plasma
The state of matter that best describes the elements inside stars is plasma.
Which are examples of non-visible light?(1 point)
Responses
white light from the sun and microwaves
white light from the sun and microwaves
white light from a lightbulb and rainbows
white light from a lightbulb and rainbows
rainbows and X-rays
rainbows and X-rays
radio waves and ultraviolet light
Rainbows and X-rays are examples of non-visible light.
Use the diagram to answer the question.
The life trajectory of a stellar nebula is shown. The stellar nebula, a purple gas ball turns into an average star, depicted as a yellow circle, within 500 million years. The average star turns into a red giant, depicted as a medium sized red circle, within 10000 million years. The red giant turns into a planetary nebula, a bright star surrounded by green and blue gases, within 1000 million years. And the planetary nebula gradually cools into a white dwarf, depicted as a small white circle. The stellar nebula can also turn into a massive star, depicted as a medium blue circle, within 0.1 million years. The massive star turns into a red supergiant, depicted as a large orange circle, within 15 million years. The red supergiant turns into a supernova, a bright white star, within 1 million years. The supernova can either turn into a neutron star, depicted as a yellow sphere with white rays coming out of its sides, or a black hole, a small black circle surrounded by purple rays.
According to the diagram, where do all stars begin their evolution?
(1 point)
Responses
red giant
red giant
stellar nebula
stellar nebula
supernova
supernova
white dwarf
According to the diagram, all stars begin their evolution as a stellar nebula.
The Sun, like 80 to 90 percent of stars, is in which stage of life?(1 point)
Responses
main sequence
main sequence
dying star
dying star
stellar formation
stellar formation
red giant