Earth Science Geology, the Environment, and the Universe

Chapter 29: Stars

Standardized Test Practice-English

1
What layer of the Sun's atmosphere is above the chromosphere?
A)corona
B)stratosphere
C)photosphere
D)troposphere
2
What is the Sun's average density similar to?
A)the density of water
B)the density of the entire solar system
C)the density of the rocky planets
D)the density of the gas giant planets
3
The lowest layer of the Sun's atmosphere is called the __________.
A)chromosphere
B)corona
C)photosphere
D)thermosphere
4
What is a spectrum that comes from noncompressed gas called?
A)absorption
B)continuous
C)emission
D)fusion
5
What causes the wavelength of a star's spectral lines to shift?
A)the composition of the star
B)the apparent magnitude of the star
C)the temperature of the star
D)motion between the star and the observer
6
What are two stars that orbit a common center of mass called?
A)seasonal
B)a binary
C)circumpolar
D)a cluster
7
The difference of two stars' spectra is due to the difference between their __________.
A)apparent magnitude
B)composition
C)temperature
D)luminosity
8
Constellations that can be seen all year long from a certain location are __________.
A)cluster
B)circumpolar
C)seasonal
D)binary
9
Mass, luminosity, temperature, and diameter of stars can be demonstrated on a __________.
A)Doppler shift
B)spectrum
C)main sequence
D)Hertzsprung-Russell diagram
10
Energy output from the surface of a star is called __________.
A)absolute magnitude
B)apparent magnitude
C)luminosity
D)spectra
11
During red shift, the observed wavelengths of light from distant celestial objects appear closer to the red end of the spectrum than light from nearby celestial objects. The explanation of red shift is the universe is presently __________.
A)contracting only
B)expanding only
C)remaining constant in size
D)alternation between contracting and expanding
12
The Sun is powered by nuclear reactions involving which of the following?
A)fusion of helium to form hydrogen
B)fission of helium to form hydrogen
C)fusion of hydrogen to form helium
D)fission of hydrogen to form helium
13
Areas of cooler temperature on the Sun's surface are _______.
A)solar flares
B)sunspots
C)solar winds
D)prominences
14
A forming star needs a critical minimum amount of mass to enable ______.
A)fusion reactions to begin
B)planets to form
C)fission reactions to begin
D)atoms of hydrogen to form
15
Fusion reactions could not occur in a star without the pressure created by _______.
A)electrons
B)gravity
C)antimatter
D)rotational energy
16
The amount of helium in the Sun is __________.
A)increasing
B)decreasing
C)fluctuation
D)staying about the same
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