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ASTRO 101 EXAM 2 Questions and Correct
Answers
Formation of The Moon Ans: Earth was struck by embryo of Mars
Part of Earth's mantle was ejected
This coalesced in the Moon
Asteroids and Comets Ans: Leftovers from the accretion process
Rocky asteroids inside frost line
Icy comets outside frost line
Origin of Asteroids Ans: Stellar X-Rays cleared leftover gas, but
not leftover planetesimals
Those leftover rocky planetesimals which did not accrete onto a
planet are the present-day asteroids
Solar Rotation Ans: - In nebular theory, young Sun rotated much
faster than now
- Friction between solar magnetic field and solar nebular probably
slowed the rotation over time
Flattening Ans: Collisions between particles in the cloud caused it
to flatten into a disk.
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Conservation of Angular Momentum Ans: Rotation increased as
the cloud contracted
Galileo's Telescope Lens: ~ 2.5cm Diameter
Naked Eye (Pupil): ~ 0.5 cm Diameter
About how much more light does Galileo's telescope collect
compared to the naked eye?
A) 5 times more
B) 5 times less
C) 25 times more
D) 50 times more Ans: C
Galileo's Telescope Lens: ~ 2.5cm Diameter
Naked Eye (Pupil): ~ 0.5 cm Diameter
About how much better angular resolution (diffraction limit) does
Galileo's telescope have compared to the naked eye?
A) 5 times better
B) 5 times worse
© 2025 All rights reserved
ASTRO 101 EXAM 2 Questions and Correct
Answers
Formation of The Moon Ans: Earth was struck by embryo of Mars
Part of Earth's mantle was ejected
This coalesced in the Moon
Asteroids and Comets Ans: Leftovers from the accretion process
Rocky asteroids inside frost line
Icy comets outside frost line
Origin of Asteroids Ans: Stellar X-Rays cleared leftover gas, but
not leftover planetesimals
Those leftover rocky planetesimals which did not accrete onto a
planet are the present-day asteroids
Solar Rotation Ans: - In nebular theory, young Sun rotated much
faster than now
- Friction between solar magnetic field and solar nebular probably
slowed the rotation over time
Flattening Ans: Collisions between particles in the cloud caused it
to flatten into a disk.
© 2025 All rights reserved
, 2 | Page
Conservation of Angular Momentum Ans: Rotation increased as
the cloud contracted
Galileo's Telescope Lens: ~ 2.5cm Diameter
Naked Eye (Pupil): ~ 0.5 cm Diameter
About how much more light does Galileo's telescope collect
compared to the naked eye?
A) 5 times more
B) 5 times less
C) 25 times more
D) 50 times more Ans: C
Galileo's Telescope Lens: ~ 2.5cm Diameter
Naked Eye (Pupil): ~ 0.5 cm Diameter
About how much better angular resolution (diffraction limit) does
Galileo's telescope have compared to the naked eye?
A) 5 times better
B) 5 times worse
© 2025 All rights reserved
