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EAPS 105|71 Exam 1 Review Questions Well Anwered|2025

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  • EAPS 105
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  • EAPS 105

Why the gas giants had to form within 3-10 million years from the birth of the Sun - ️️they had to attract hydrogen and helium gases before these were blown away by the solar wind Why the giant planets have faster spin rates than terrestrial planets - ️️because they are more massive Why t...

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  • November 10, 2024
  • 7
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • EAPS 105
  • EAPS 105
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jackline98
EAPS 105 Exam 1
Why the gas giants had to form within 3-10 million years from the birth of the Sun
- ✔ ✔ they had to attract hydrogen and helium gases before these were
blown away by the solar wind

Why the giant planets have faster spin rates than terrestrial planets - ✔ ✔
because they are more massive

Why the interiors of large asteroids and planets are very hot inside - ✔ ✔
when they get big enough they heat up inside due to the heat of accretion and
radioactive decay, causing the interior to melt

Why the spin axis of most planets is tilted relative to the ecliptic plane - ✔ ✔
because of violent collisions with large objects

About how long it took for the Solar Nebula to transform into the Solar System we
see today - ✔ ✔ a few hundred million years to evolve

Asteroid belt distance from Sun - ✔ ✔ 2-3.5 AU

How are planetesimals form? - ✔ ✔ Starting from dust grains, planets accrete
out of a solar nebula by combining, through collisions

How much of the solar system's mass resides in the Sun? - ✔ ✔ 99.86%

How the angular velocity of a rotating solar nebula varies with distance from the
star - ✔ ✔ the angular velocity of a rotating solar nebula is fastest closest to
the star and slowest away from the star

How the conservation of angular momentum influenced planet spin - ✔ ✔ the
more mass a planet has, the faster it rotates

How the internal structure of the gas giants is layered - ✔ ✔ core, metallic
hydrogen, liquid hydrogen, gaseous hydrogen, and then clouds

, How the orbital parameters of a moon can be used to determine the mass of a
planet - ✔ ✔ you need to know the orbital distance (r) and the angular
velocity (omega) of one of its moons

How we know the chemistry of the Sun and its most abundant elements - ✔ ✔
The Sun's absorption spectrum

Jupiter distance from Sun - ✔ ✔ 5 AU

Kepler's First Law - ✔ ✔ The Law of Orbits: All planets move in elliptical orbits,
with the sun at one focus.



Know how the mass available to build planets varied as a function of distance
from the Sun in the solar nebula - ✔ ✔ mass available to build planets
increased with distance because the farther a planet is from the Sun, the greater
the volume of space covered by its orbit

Know the theories of why Mercury has an overly large core - ✔ ✔ a giant
impact blew off most of Mercury's mantle, Mercury's outer layers were vaporized
by a really hot young Sun, Mercury was assembled from mostly metal-rich
building blocks and thus never had a large mantle

Know the three most abundant elements in the original Solar Nebula - ✔ ✔
hydrogen, helium, and oxygen

Mars distance from Sun - ✔ ✔ 1.5 AU

Mercury distance from Sun - ✔ ✔ 0.39 AU

Neptune distance from Sun - ✔ ✔ 30 AU

Pluto distance from Sun - ✔ ✔ 30-50 AU

Possible consequences of the Grand Tack - ✔ ✔ smaller Mars, smaller amount
of material left in the asteroid belt, one or more planets may have been kicked
out of our solar system

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