What do scientists use to describe a constellation?(1 point)
Responses
its boundary
its boundary
its story in Greek mythology
its story in Greek mythology
its star pattern
its star pattern
its brightest star
its star pattern
The Stars Unit Review Practice
5 of 105 of 10 Items
Question
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.
What determines whether a star will end its life cycle as a black hole or neutron star or as a white dwarf?
(1 point)
Responses
the mass of the star
the mass of the star
the temperature of the star
the temperature of the star
the color of the star
the color of the star
the age of the star
the age of the star
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the mass of the star
All stars produce energy through nuclear fusion. Which is the reactant for the nuclear fusion reaction in all young stars?(1 point)
Responses
helium
helium
carbon
carbon
iron
iron
hydrogen
hydrogen
Which is most useful in classifying stars?(1 point)
Responses
knowing the movements of a star
knowing the movements of a star
knowing the apparent magnitude of a star
knowing the apparent magnitude of a star
knowing the size of a star
knowing the size of a star
knowing the color and brightness of a star
knowing the color and brightness of a star
Use the diagram to answer the question.
The Hertzsprung-Russell Diagram shows the spectral class of stars across the top, the temperature in Kellvin of stars across the bottom. The luminosity of stars, with the luminosity of the Sun equal to one, on the right, and the absolute magnitude of stars on the right. Blue giants, red supergiants, red giants, main sequence stars, the Sun, and white dwarfs are shown on the diagram.
In which spectral class does a main sequence star with a temperature of 3,000 Kelvin belong?
(1 point)
Responses
K
K
F
F
G
G
M
M
You are making an illustration of the life cycle of an average star and the life cycle of a massive star as part of a computer animation. Drag each item to indicate whether it is a label for an average star or a massive star. Some labels may be used more than once. (2 points)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
Labels for Illustration of the Life Cycle of an Average Star Labels for Illustration of the Life Cycle of a Massive Star