Science Review: Question Preview (ID: 9933)

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The average distance from the Earth to the Sun is
a) 1 astronomical unit
b) 10 parsecs
c) 10,000,000 leagues
d) 100,000,000 meters

What shape is the Milky Way?
a) dwarf elliptical
b) giant elliptical
c) spiral
d) irregular

Which BEST describes the center of the Milky Way?
a) There are a small number of stars in the center of the Milky Way.
b) Only gas and dust are at the center of the Milky Way.
c) One super-massive star is found at the center of the Milky Way.
d) The center of the Milky Way is densely populated by stars.

Which BEST describes the age of stars in the Milky Way?
a) The youngest stars are in the galactic center, while the oldest are in the spiral arms.
b) The oldest stars are in the galactic center, while the youngest are in the spiral arms.
c) There is no pattern to the age distribution of stars in the Milky Way.
d) The Milky Way contains only very young stars.

Which unit of measure BEST describes the distance between stars within a galaxy?
a) Angstrom
b) kilometer
c) meter
d) light-year

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 changing tides create the lights in the polar regions of Earth.
b) The Sun’s electromagnetic energy in the x-ray wavelength band interacts with the cold polar air to c
c) Charged particles from solar wind enter Earth’s atmosphere and interact with atmospheric gases, crea
d) The Coriolis effect leads to friction between particles in the atmosphere which produces light.

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) solar flares
b) sunspot activity
c) Oort minima
d) coronal turbulence

If the Sun stopped producing energy, then all fusion would cease in its
a) radiative zone
b) Lithosphere
c) Core
d) Corona

Which of these statements about the properties of a star is TRUE?
a) There is no relationship between a star’s temperature and its rate of nuclear reaction.
b) The more massive a main sequence star is the cooler the star’s temperature will be.
c) All stars in the universe are roughly the same age.
d) The mass and composition of a star determine almost all of its other properties.

The term for the total rate at which a star emits radiation energy is:
a) apparent magnitude
b) absolute magnitude
c) luminosity
d) temperature

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