Which state of matter best describes the elements inside stars?(1 point)
gas
...
Which state of matter best describes the elements inside stars?(1 point)
gas
plasma
liquid
solid
Which is the first stage in the life cycle of a massive star?(1 point)
white drawf
nebula
black hole
red giant
As a star's size increases, its luminosity #1(Blank). As a star's temperature #2(Blank) , its luminosity increases.
#1 decreases / increases
#2 decreases / increases
The Sun, like 80 to 90 percent of stars, is in which stage of life?(1 point)
dying star
red giant
stellar formation
main sequence
Which statement correctly explains how the Hertzsprung-Russell diagram helps to compare stars?(1 point)
The Hertzsprung-Russell diagram plots stars according to their luminosity and temperature, which is also associated with spectral class.
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 Sun's high temperature places it to the far left of the Hertzsprung-Russell diagram.
How do scientists learn about the age of the solar system and its planetary bodies? Select the two correct answers. (1 point)
using radiometric dating of meteorites
analyzing impact craters on planetary body surfaces
measuring distances between planets
comparing the composition of the gaseous planets to the rocky planets
Which describe the study of spectroscopy? Select the two correct answers.(1 point)
the number of galaxies
interaction of light and atoms
reflection of light by Earth
emission and absorption of light
Why are spectral lines useful in classifying stars?(1 point)
They show a star's location.
They show the composition of a star.
They indicate a star's age.
They show the layers that make up a star.
Which of these is a heavy element in a star?(1 point)
lithium
hydrogen
carbon
helium
Which are examples of non-visible light?(1 point)
radio waves and ultraviolet light
rainbows and X-rays
white light from a lightbulb and rainbows
white light from the sun and microwaves
Answers: 1
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