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Science Review
Test Description: Review for the science final
Instructions: Answer all questions to get your test result.
1) The average distance from the Earth to the Sun is
A
1 astronomical unit
B
100,000,000 meters
C
10,000,000 leagues
D
10 parsecs
2) What shape is the Milky Way?
A
giant elliptical
B
spiral
C
irregular
D
dwarf elliptical
3) Which BEST describes the center of the Milky Way?
A
Only gas and dust are at the center of the Milky Way.
B
The center of the Milky Way is densely populated by stars.
C
One super-massive star is found at the center of the Milky Way.
D
There are a small number of stars in the center of the Milky Way.
4) Which BEST describes the age of stars in the Milky Way?
A
There is no pattern to the age distribution of stars in the Milky Way.
B
The oldest stars are in the galactic center, while the youngest are in the spiral arms.
C
The Milky Way contains only very young stars.
D
The youngest stars are in the galactic center, while the oldest are in the spiral arms.
5) Which unit of measure BEST describes the distance between stars within a galaxy?
A
Angstrom
B
light-year
C
meter
D
kilometer
6) The Aurora Borealis, sometimes called the Northern Lights, is a broad display of faint light in the northern skies at night. What is the main cause of these lights?
A
The Sun’s electromagnetic energy in the x-ray wavelength band interacts with the cold polar air to c
B
Charged particles from solar wind enter Earth’s atmosphere and interact with atmospheric gases, crea
C
The changing tides create the lights in the polar regions of Earth.
D
The Coriolis effect leads to friction between particles in the atmosphere which produces light.
7) One evening, several regional electrical power grids were disrupted. At the same time, cellphone users lost service. Which solar phenomena is the most likely cause?
A
coronal turbulence
B
Oort minima
C
solar flares
D
sunspot activity
8) If the Sun stopped producing energy, then all fusion would cease in its
A
Core
B
Corona
C
radiative zone
D
Lithosphere
9) Which of these statements about the properties of a star is TRUE?
A
All stars in the universe are roughly the same age.
B
The mass and composition of a star determine almost all of its other properties.
C
The more massive a main sequence star is the cooler the star’s temperature will be.
D
There is no relationship between a star’s temperature and its rate of nuclear reaction.
10) The term for the total rate at which a star emits radiation energy is:
A
temperature
B
apparent magnitude
C
luminosity
D
absolute magnitude
*select an answer for all questions
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