Earth Science: Geology, the Environment, and the Universe

Section 1: The Sun

The Sun

1
What two elements make up 98.4 percent of the Sun's composition?
A)hydrogen and carbon dioxide
B)hydrogen and nitrogen
C)oxygen and helium
D)hydrogen and helium
2
Which zone of the Sun moves energy through radiation?
A)convective
B)photosphere
C)radiative
D)corona
3
From where on the Sun does the solar wind escape?
A)coronal holes
B)sunspots
C)solar flares
D)photosphere
4
What layer of the Sun's atmosphere is above the chromosphere?
A)corona
B)stratosphere
C)photosphere
D)troposphere
5
What are dark spots on the Sun's photosphere called?
A)auroras
B)sunspots
C)solar winds
D)solar flares
6
__________ is the combining of light weight nuclei into heavier nuclei, which gives off energy that fuels the Sun.
A)Radiation
B)Fusion
C)Division
D)Fission
7
The Sun contains __________ percent of all the mass in our solar system.
A)99
B)1
C)100
D)10
8
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
9
Where does the Sun's energy originate in the figure?
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A)A and C
B)A
C)B
D)C
10
Gas flows outward from the corona and forms the __________.
A)sunspot
B)aurora
C)solar wind
D)solar flare
11
The lowest layer of the Sun's atmosphere is called the __________.
A)lithosphere
B)photosphere
C)chromosphere
D)troposphere
12
Why do astronomers rely on computer models for an explanation of the Sun's interior?
A)to remove the effects of the solar wind
B)They need more than the observations of the interior.
C)The interior is only visible during a solar eclipse.
D)The interior can't be directly observed.
13
What is a spectrum that comes from noncompressed gas called?
A)sunspot
B)corona
C)an emission spectrum
D)rainbow
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