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Chapter 24
Concept 1 Quiz
Concept 1 Quiz
Consider how astronomers measure and classify the distance, brightness, temperature, mass, and size of stars.
This activity contains 12 questions.
Using the information provided on this idealized Hertzsprung-Russell diagram, select the letter that indicates each of the indicated types of stars.
(H-R diagram, Copyright © Prentice Hall, Inc.)
This question presents 5 items numbered 1.1 through 1.5. Each item is presented with a pulldown menu containing the letters A through E.
For each item below, use the pull-down menu to select the letter that labels the correct part of the image.
1.1 supergiants
[hint]
A
B
C
D
E
1.2 giants
[hint]
A
B
C
D
E
1.3 main sequence
[hint]
A
B
C
D
E
1.4 Sun
[hint]
A
B
C
D
E
1.5 white dwarfs
[hint]
A
B
C
D
E
Stars with surface temperatures between 5000 and 6000 K (Kelvin) appear
red
blue
green
yellow
violet
Stellar parallax is used to determine a star's
mass
temperature
motion
distance
brightness
One light-year is about
5.8 trillion miles
11 trillion kilometers
8 trillion kilometers
6 trillion kilometers
9.5 trillion miles
The measurement of a star's brightness is called
parallax
period
pulsation
temperature
magnitude
The color of a star is most closely related to its
mass
age
radius
composition
temperature
The larger the magnitude number, the dimmer the star.
True
False
A first-magnitude star is about 100 times dimmer than a sixth-magnitude star.
True
False
The apparent brightness of a star as seen from Earth is determined by
how big the star is
how hot the star is
how far away the star is
a and b
all of the above
Binary stars are pairs of stars united by their mutual gravitation.
True
False
Stars that fluctuate in brightness by expanding and contracting are called
supernovas
eruptive variables
novas
pulsating variables
binary
The two properties of a star that are plotted on an H-R diagram are
distance and brightness
brightness and temperature
size and temperature
size and distance
speed and distance
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