Earth and Space Science- Final Exam, Chapter 17
On an average clear night, the number of meteors that can be seen per hour is
5 to 10
The moon's diameter is about
1/4 that of the earth.
The dwarf planets have diameters of about
1000 km.
The time needed for the Apollo spacecraft to reach the moon was about
3 days.
The planet with the most mass is
Jupiter.
Comets
follow orbits around the sun.
A planet that consists largely of hydrogen and helium is
Jupiter.
The largest of the following planets is: A. Mars B. Jupiter C. Saturn D. Uranus
Jupiter.
Most asteroids lie in a belt between
Mars and Jupiter.
An astronaut would weigh least on the surface of
Mars.
The smallest of the following planets is: A. Mars B. Jupiter C. Saturn D. Uranus
Mars.
A planet with virtually no atmosphere is
Mercury.
The largest of Jupiter's satellites is about the size of
Mercury.
The length of the year is shortest on
Mercury.
The planet nearest to the sun is
Mercury.
The planet whose surface most resembles that of the moon is
Mercury.
A dense atmosphere of carbon dioxide is found on
Venus.
A planet that has phases like those of the moon is
Venus.
A planet with no known satellites is
Venus.
The planet closest to the earth in size and mass is
Venus.
The planet that appears brightest in the sky is
Venus.
The moon's surface is
about as irregular as the earth's surface.
The tail of a comet always points
away from the sun.
At new moon, the moon is
between the earth and the sun.
The rings of Saturn
consist of separate particles.
An eclipse of the moon occurs when the
earth passes directly between the sun and the moon.
Meteors occur in the night sky
every night, but with greater frequency during shower periods.
Eclipses of the moon occur at
full moon.
The moon's surface shows no signs of
glacier erosion.
Comets consist largely of
ice and dust
The moon's maria are
lava flows pulverized by meteoroid impacts.
The spacecraft that traveled to Mars did not find
living things.
Compared with the earth, Mars has a
lower average surface temperature.
The average density of the moon is
lower than that of the earth.
Meteoroids are
members of the solar system.
Most of the craters on the moon are probably the result of
meteoroid bombardment.
An asteroid 2 km or more across could cause a worldwide catastrophe. Such an asteroid is thought to collide with the earth an average of every
million years.
Eclipses of the sun occur at
new moon.
Relative to the oldest rocks that have been found on the earth, the oldest known lunar rocks are
older.
The planets shine because they
reflect sunlight.
The surface of Titan, Saturn's largest moon
shows signs of erosion by flowing liquid.
The asteroids probably consist largely of
silicate minerals.
The majority of meteoroids consist of
silicate minerals.
The interior of the moon is probably entirely or almost entirely
solid.
Relative to the time the moon takes to circle the earth, the period of its rotation on its axis is
the same.
