Stars
Practice Test
1.
What causes the wavelength of a star's spectral lines to shift?
SC.E.2.4.1
a.
the composition of the star
b.
the apparent magnitude of the star
c.
motion between the star and the observer
d.
the temperature of the star
2.
The objects that eventually formed planets by colliding and merging are called __________.
SC.E.1.4.2
a.
asteroids
b.
stars
c.
solar nebula
d.
planetesimals
3.
A __________ is visible light arranged according to wavelength.
SC.E.2.4.1
a.
emission spectrum
b.
auroras
c.
solar flare
d.
spectrum
4.
What are dark spots on the Sun's photosphere called?
SC.E.1.4.1
a.
solar winds
b.
solar flares
c.
auroras
d.
sunspots
5.
Why do astronomers rely on computer models for an explanation of the Sun's interior?
SC.E.1.4.1
a.
The interior is only visible during a solar eclipse.
b.
They need more than the observations of the interior.
c.
The interior can't be directly observed.
d.
to remove the effects of the solar wind
6.
What is the disadvantage of absolute magnitude?
SC.E.2.4.1
a.
It can only be calculated if the stars composition is known.
b.
It can only be calculated if a stars distance is known.
c.
It can't be calculated for the Sun.
d.
It is only the apparent magnitude.
7.
Look at the periodic table in the figure. What is unique about the two elements that compose most of the Sun's gases?
SC.E.1.4.1
a.
They're both radioactive.
b.
They're both metals.
c.
They're very heavy elements.
d.
They're the two smallest elements.
8.
The lowest layer of the Sun's atmosphere is called the __________.
SC.E.1.4.1
a.
lithosphere
b.
photosphere
c.
troposphere
d.
chromosphere
9.
Where are most asteroids located?
SC.E.1.4.2
a.
orbiting all planets
b.
between Mars and Jupiter
c.
between Earth and Venus
d.
outside of Pluto's orbit
10.
How is the composition of a white dwarf determined?
a.
by the size of the supernova
b.
by how many reaction phases it went through
c.
by the size of its planetary nebula
d.
by its luminosity
11.
From Earth, stars appear to shift in position, which is called __________.
SC.E.2.4.2
a.
apparent magnitude
b.
circumpolar
c.
parallax
d.
binary
12.
Why doesn't apparent magnitude actually measure the brightness of the star?
SC.E.2.4.1
a.
It doesn't account for distance.
b.
It doesn't account for energy output.
c.
It doesn't account for composition.
d.
It doesn't account for temperature.
13.
Comets are bodies that are __________ that orbit __________.
SC.E.1.4.2
a.
larger than Earth, Earth
b.
helium gas, the Sun
c.
ice and rock, the Sun
d.
icy, each planet
14.
From what does a star form?
a.
a nebula
b.
a binary
c.
a main sequence
d.
a spectra
15.
The Sun contains __________ percent of all the mass in our solar system.
SC.E.1.4.1
a.
100
b.
99
c.
1
d.
10
