EAPS 105 CORRECT EXAMS ANSWERS AND
QUESTIONS SET A+
✔✔Why is Haumea an oblate spheroid?
A) Because it is not big enough to be a regular sphere.
B) Because it has a very large crater
C) Because it spins rapidly.
D) Because of tidal forces from one of its moons. - ✔✔C) Because it spins rapidly.
✔✔Which is the correct order of accretion to form planets?
A) planetesimals, chondrules, protoplanets, planets
B) protoplanets, planetesimals, chondrules, planets
C) chondrules, planetesimals, protoplanets, planets
D) planetesimals, protoplanets, chondrules, planets - ✔✔C) chondrules, planetesimals,
protoplanets, planets
✔✔Why are the axes of rotation of the planets not found to align perpendicular to the
ecliptic?
A) Gravitational interactions with each other
B) Violent impacts
C) Changes in the distribution of mass within the planet
D) All the above - ✔✔D) All the above
✔✔Which of the following is true about achondritic meteorites?
A) They do not contain chondrules.
B) They are not the oldest rocks in the solar system.
C) They have been altered by heat.
D) All the above - ✔✔D) All the above
✔✔Why does fusion produce heat?
, A) Because an increase in mass causes an increase in energy
B) Because a decrease in mass causes an increase in energy
C) Because an increase in mass causes a decrease in energy
D) Because a decrease in mass causes a decrease in energy - ✔✔B) Because a
decrease in mass causes an increase in energy
✔✔Which is the correct sequence of the Solar Nebula Hypothesis? (Don't worry about
the starting point, just the order, since this is a cycle.)
A) diffuse cloud, stellar system, mass loss, dense cloud, accretion disc
B) diffuse cloud, mass loss, accretion disc, dense cloud, stellar system
C) diffuse cloud, dense cloud, accretion disc, stellar system, mass loss
D) diffuse cloud, accretion disc, stellar system, mass loss, dense cloud - ✔✔C) diffuse
cloud, dense cloud, accretion disc, stellar system, mass loss
✔✔What was at the center of Aristotle's universe?
A) The Sun
B) The Earth
C) The Moon
D) A black hole - ✔✔B) The Earth
✔✔What are meteorites?
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. - ✔✔B) Small
pieces of space rock that survive passage through the atmosphere to the ground.
✔✔Which are some of the possible consequences of the Grand Tack?
A) Mars evolved to be a relatively small planet.
B) There is relatively little mass in the asteroid belt.
C) The solar system may have lost one or more planets.
D) All of the above - ✔✔D) All of the above
✔✔What happens to the core within a low-mass star like our Sun when fusion begins to
shut down?
A) It begins to contract and heat up
QUESTIONS SET A+
✔✔Why is Haumea an oblate spheroid?
A) Because it is not big enough to be a regular sphere.
B) Because it has a very large crater
C) Because it spins rapidly.
D) Because of tidal forces from one of its moons. - ✔✔C) Because it spins rapidly.
✔✔Which is the correct order of accretion to form planets?
A) planetesimals, chondrules, protoplanets, planets
B) protoplanets, planetesimals, chondrules, planets
C) chondrules, planetesimals, protoplanets, planets
D) planetesimals, protoplanets, chondrules, planets - ✔✔C) chondrules, planetesimals,
protoplanets, planets
✔✔Why are the axes of rotation of the planets not found to align perpendicular to the
ecliptic?
A) Gravitational interactions with each other
B) Violent impacts
C) Changes in the distribution of mass within the planet
D) All the above - ✔✔D) All the above
✔✔Which of the following is true about achondritic meteorites?
A) They do not contain chondrules.
B) They are not the oldest rocks in the solar system.
C) They have been altered by heat.
D) All the above - ✔✔D) All the above
✔✔Why does fusion produce heat?
, A) Because an increase in mass causes an increase in energy
B) Because a decrease in mass causes an increase in energy
C) Because an increase in mass causes a decrease in energy
D) Because a decrease in mass causes a decrease in energy - ✔✔B) Because a
decrease in mass causes an increase in energy
✔✔Which is the correct sequence of the Solar Nebula Hypothesis? (Don't worry about
the starting point, just the order, since this is a cycle.)
A) diffuse cloud, stellar system, mass loss, dense cloud, accretion disc
B) diffuse cloud, mass loss, accretion disc, dense cloud, stellar system
C) diffuse cloud, dense cloud, accretion disc, stellar system, mass loss
D) diffuse cloud, accretion disc, stellar system, mass loss, dense cloud - ✔✔C) diffuse
cloud, dense cloud, accretion disc, stellar system, mass loss
✔✔What was at the center of Aristotle's universe?
A) The Sun
B) The Earth
C) The Moon
D) A black hole - ✔✔B) The Earth
✔✔What are meteorites?
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. - ✔✔B) Small
pieces of space rock that survive passage through the atmosphere to the ground.
✔✔Which are some of the possible consequences of the Grand Tack?
A) Mars evolved to be a relatively small planet.
B) There is relatively little mass in the asteroid belt.
C) The solar system may have lost one or more planets.
D) All of the above - ✔✔D) All of the above
✔✔What happens to the core within a low-mass star like our Sun when fusion begins to
shut down?
A) It begins to contract and heat up
