final mutiple choice Flashcards
Comets consist largely of?
a. hydrogen
b. iron
c. ice and dust
d. rocks
C. Ice and dust
The tail of a comet?
a. is constant in size
b. always points away from its direction of motion
c. always points toward the sun
d. always points away from the sun
D. always points away from the sun
The planet nearest to the sun is:
a. Mercury
b. Venus
c. Saturn
d. Neptune
A. Mercury
The smallest of the following planets is:
a. Mars
b. Saturn
c. Jupiter
d. Uranus
A. Mars
The planet closest to the earth in size and mass is:
a. Mercury
b. Mars
c. Venus
d. Uranus
C. Venus
The largest of the following planets is:
a. Mars
b. Saturn
c. Jupiter
d. Uranus
C. Jupiter
A planet with virtually no atmosphere is:
a. mercury
b. Jupiter
c. Mars
d. saturn
A. Mercury
The planet that appears the brightest in the sky is:
a. Venus
b. Jupiter
c. Mars
d. Saturn
A. Venus
A dense atmosphere of carbon dioxide is found on:
a. mercury
b. mars
c. Venus
d. the moon
B. Venus
A planet with no known satellites/moons is:
a. Venus
b. Jupiter
c. Saturn
d. Uranus
A. Venus
The rings of Saturn:
a. are gas clouds
b. are sheets of liquid
c. are sheets of solid rock
d. consists of separate particles
d. consists of separate particles
The planet with the most mass is:
a. earth
b. saturn
c. jupiter
d. neptune
C. Jupiter
A planet that consists largely of hydrogen and helium is:
a. mercury
b. Venus
c. Mars
d. Jupiter
D. Jupiter
At new moon the moon is:
a. between the earth and the sun
b. on the opposite side of the earth from the sun
c. on the opposite side of the sun from the earth
d. to the side of a line between the earth and the sun
A. between the earth and the sun
Eclipses of the sun occur at:
a. new moon
b. full moon
c. first or last quarter
d. anytime
A. new moon
Eclipses of the moon occur during:
a. new moon
b. full moon
c. first and last quarter
d. anytime
A. new moon
b. full moon
The moons maria is what?
a. bodies of water like the earths oceans
b. solid lava flows
c. lava flows pulverized by meteorized impacts
d. hardened sediments
c. lava flows pulverized by meteoroid impacts
The sun is:
a. unusually small star
b. unusually large star
c. rather ordinary star
d. rather unordinary star
C. rather ordinary star
The surface temperature of the sun is approximately:
a. 600k
b. 6000K
c. 6 million K
d. 14 million K
B. 6000K
the suns atmosphere:
a. extends out into the solar system
b. consists mainly of oxygen and nitrogen
c. consists of burning hydrogen
d. is relatively cool
A. extends out into the solar system
Sunspots are:
a. dark clouds in the sun’s atmosphere
b. regions somewhat cooler than the rest of the sun’s surface
c. regions somewhat hotter than the rest of the sun’s surface
d. of unknown nature
B. regions somewhat cooler than the rest of the sun’s surface
The duration of the sunspot cycle is approximately:
a. 27 days
b. 3 years
c. 6 months
d. 11 years
D. 11 years
sunspot activity does not affect:
a. shortwave radio communication
b. the aurora
c. The earth’s magnetic field
d. volcanic eruptions
D. Volcanic eruptions
The temperature of the sun’s interior is believed to be about:
a. 600K
b. 6000K
c. 14 million K
d. 14 billion K
C. 14 million K
Proxima Centauri, the closest star to the sun, is at a distance of about
a. 4 light years away
b. 400 light years away
c. 4 million light years away
d. 4 billion light years away
A. 4 light years away
The color of a relatively cool star is:
a. white
b. blue
c. yellow
d. red
D. Red
A typical white dwarf star is about the size of
a. a large building
b. the earth
c. the moon
d. jupiter
B. the earth
When the hydrogen supply in a typical main-sequence star begins to run out, other nuclear reactions occur and the star becomes a:
a. red giant
b. supernova
c. white dwarf
d. neutron star
A. red giant
A star like the sun eventually becomes:
a. black hole
b. supernova
c. white dwarf
d. neutron star
C. white dwarf
A star that explodes as a supernova:
a. has a mass much greater than that of the sun
b. has mass much smaller than that of the sun
c. has a mass about equal to that of the sun
d. may have any mass
A. has a mass much greater than that of the sun
The brightest of the following types of stars is a:
a. red giant
b. supernova
c. white dwarf
d. neutron star
B. supernova
A pulsar is not
a. he remnant of a supernova explosion
b. rotating rapidly
c. composed largely of neutrons
d. as large as the earth
D. as large as the earth
A black hole appears black because
a. it is too cool to radiate
b. it is surrounded by an absorbing layer of gas
c. its gravitational field is too strong to permit light to escape
d. its magnetic field is too strong to permit light to escape
C. its gravitational field is too strong to permit light to escape
Black holes are remnants of:
a. stars with small masses
b. stars with large masses
c. white dwarfs
d. black dwarfs
B. stars with large masses
The milky way is:
a. a gas cloud in the solar system
b. a gas cloud in the galaxy of which the sun is a member
c. the galaxy of which the sun is a member
d. a nearby galaxy
C. the galaxy of which the sun is a member
Our galaxy is approximately:
a. 4 light years across
b. 15,000 light years across
c. 130,000 light years across
d. 4 million light years across
C. 130,000 light years across
The number of stars in our galaxy is roughly
a. 2,000
b. 2 billion
c. 2 million
d. 200 billion
D. 200 billion
Our galaxy has:
1 main spiral arm
b. 2 main spiral arms
c. 3 main spiral arms
d. 4 main spiral arms
D. 4 main spiral arms
Our galaxy is shaped roughly like a fried egg whose diameter is about:
a. twice its thickness
b. 10 times its thickness
c. 100 times its thickness
d. 1 million times its thickness
B. 10 times its thickness
Clouds are luminous gas and dust in our galaxy are called:
a. galactic cluster
b. galactic nebulas
c. quasars
d. cosmic rays
B. galactic nebulas
