EAPS 105 ACTUAL FINAL ANSWERS AND QUESTIONS
SET A+
✔✔Which orbits with the lowest angular velocity?
A) The Moon
B) A geosynchronous satellite
C) The Hubble Space Telescope
D) The International Space Station - ✔✔A) The Moon
✔✔What are meteors?
A) Large rocks meters to 100s of km that orbit the sun primarily between Mars and
Jupiter.
B) Small pieces of space rock that survive passage through the atmosphere to the
ground.
C) Small rocks from space that light up in the night sky as they burn up the Earth's
atmosphere.
D) Small rocks (less than a few meters across) travelling through space. - ✔✔C) Small
rocks from space that light up in the night sky as they burn up the Earth's atmosphere.
✔✔Based on the conservation of angular momentum, how does one expect the planets
to spin?
A) Planets should spin in the same direction they orbit.
B) Planets should spin about an axis perpendicular to the plane of the solar system
(known as the ecliptic).
C) Planets should spin faster than the average rotation of the accreted material since
accretion reduces the average radius of the collection of accreted objects.
D) All of the above - ✔✔D) All of the above
✔✔What are meteoroids?
, A) Large rocks meters to 100s of km that orbit the sun primarily between Mars and
Jupiter.
B) Small pieces of space rock that survive passage through the atmosphere to the
ground.
C) Small rocks from space that light up in the night sky as they burn up the Earth's
atmosphere.
D) Small rocks (less than a few meters across) travelling through space. - ✔✔D) Small
rocks (less than a few meters across) travelling through space.
✔✔What limits the height of plateaus and mountains on celestial bodies?
A) The gravity of the body
B) Tidal forces
C) The spin of the body
D) The orbital characteristics of the body - ✔✔A) The gravity of the body
✔✔What does it mean for an asteroid or planet to be differentiated?
A) It is made of metals and rocks.
B) It is made of rocks and ice.
C) Its internal structure is layered with density increasing with depth.
D) Its surface has two distinct rock types. - ✔✔C) Its internal structure is layered with
density increasing with depth.
✔✔True/False: On the surface of a celestial body, gravity always points toward the
center of the body.
A) True
B) False - ✔✔A) False
✔✔True/False. In general, one cannot see the Earth rise over the horizon from
anywhere on the surface of the Moon.
A) True
B) False - ✔✔B) False
✔✔Why are the spin rates of the giant planets faster than that of Earth?
A) They are farther from the Sun
B) They orbit the sun faster
C) They are more massive
D) They are primarily made of gas - ✔✔C) They are more massive
✔✔Why is the Moon's core so proportionally small?
SET A+
✔✔Which orbits with the lowest angular velocity?
A) The Moon
B) A geosynchronous satellite
C) The Hubble Space Telescope
D) The International Space Station - ✔✔A) The Moon
✔✔What are meteors?
A) Large rocks meters to 100s of km that orbit the sun primarily between Mars and
Jupiter.
B) Small pieces of space rock that survive passage through the atmosphere to the
ground.
C) Small rocks from space that light up in the night sky as they burn up the Earth's
atmosphere.
D) Small rocks (less than a few meters across) travelling through space. - ✔✔C) Small
rocks from space that light up in the night sky as they burn up the Earth's atmosphere.
✔✔Based on the conservation of angular momentum, how does one expect the planets
to spin?
A) Planets should spin in the same direction they orbit.
B) Planets should spin about an axis perpendicular to the plane of the solar system
(known as the ecliptic).
C) Planets should spin faster than the average rotation of the accreted material since
accretion reduces the average radius of the collection of accreted objects.
D) All of the above - ✔✔D) All of the above
✔✔What are meteoroids?
, A) Large rocks meters to 100s of km that orbit the sun primarily between Mars and
Jupiter.
B) Small pieces of space rock that survive passage through the atmosphere to the
ground.
C) Small rocks from space that light up in the night sky as they burn up the Earth's
atmosphere.
D) Small rocks (less than a few meters across) travelling through space. - ✔✔D) Small
rocks (less than a few meters across) travelling through space.
✔✔What limits the height of plateaus and mountains on celestial bodies?
A) The gravity of the body
B) Tidal forces
C) The spin of the body
D) The orbital characteristics of the body - ✔✔A) The gravity of the body
✔✔What does it mean for an asteroid or planet to be differentiated?
A) It is made of metals and rocks.
B) It is made of rocks and ice.
C) Its internal structure is layered with density increasing with depth.
D) Its surface has two distinct rock types. - ✔✔C) Its internal structure is layered with
density increasing with depth.
✔✔True/False: On the surface of a celestial body, gravity always points toward the
center of the body.
A) True
B) False - ✔✔A) False
✔✔True/False. In general, one cannot see the Earth rise over the horizon from
anywhere on the surface of the Moon.
A) True
B) False - ✔✔B) False
✔✔Why are the spin rates of the giant planets faster than that of Earth?
A) They are farther from the Sun
B) They orbit the sun faster
C) They are more massive
D) They are primarily made of gas - ✔✔C) They are more massive
✔✔Why is the Moon's core so proportionally small?
