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EAPS 105|90 Exam 1 Study Guide Questions With Answers|2025

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  • EAPS 105
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  • EAPS 105

Which are the terrestrial planets? - ️️Mercury, Venus, Earth, Mars The relative angular velocity of Earth's satellites (natural and otherwise) based on their orbital distance - ️️Satellites orbit more slowly the more distant they orbit Satellites orbit faster the less distant they orbit ...

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  • November 10, 2024
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  • 2024/2025
  • Exam (elaborations)
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  • EAPS 105
  • EAPS 105
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EAPS 105|90 Exam 1 Study Guide
Which are the terrestrial planets? - ✔ ✔ Mercury, Venus, Earth, Mars

The relative angular velocity of Earth's satellites (natural and otherwise) based on
their orbital distance - ✔ ✔ Satellites orbit more slowly the more distant they
orbit

Satellites orbit faster the less distant they orbit

The relative distance from the Sun to the giant planets - ✔ ✔ Jupiter- 5.2,
Saturn- 9.54, Uranus- 19.2, Neptune- 30.06, (AU)

The relative distance from the Sun to the terrestrial planets - ✔ ✔ Mercury-
0.39, Venus- 0.72, Earth- 1, Mars- 1.52 (AU)

The relative lifespan of stars as a function of mass - ✔ ✔ Larger stars die faster
than smaller stars; burn out quicker

The relative size of the cores of the giant planets compared to Earth - ✔ ✔ -
Jupiter's core = 12-45 Earth masses

-Saturn's core = 9-22 Earth masses

-Uranus's core = 0.25-1 Earth masses

-Neptune's core = 0.5-1.5 Earth masses

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

, The two forces that maintain a force balance within a normally operating star - ✔
✔ Gravity works to collapse a star; fusion in the core creates an outward
pressure that works to expand the star

The type of nebula that is composed of hot hydrogen ions (H+) and glow - ✔ ✔
Emission nebulae

The types of meteorites that come from undifferentiated asteroids - ✔ ✔
Chondritic meteorites

Three most abundant elements in the original Solar Nebula - ✔ ✔ Hydrogen,
helium, oxygen

What a hot Jupiter is - ✔ ✔ Hot Jupiters are gas giants similar to size to Jupiter
but orbiting very close to their stars (well within Mercury's orbit) and are thus
very hot. Their existence seemingly contradicts the ice line theory of formation

What a parabolic orbit represents. - ✔ ✔ an orbit with an eccentricity of 1

What a solar nebula is - ✔ ✔ A new star that ends up surrounded by a
spinning disc of gas and dust is called a solar nebula from which planets will form.
They are always flat.

What an astronomical unit (AU) is and the general distance of the planets from
the Sun in these units? - ✔ ✔ 1 AU=Distance from Sun to Earth. Mercury: .39,
Venus: .72, Earth: 1, Jupiter: 5, Saturn: 10, Uranus: 19, Neptune: 30, Pluto: 30-50,
depending on location in orbit

Which celestial bodies follow Kepler's laws - ✔ ✔ All bodies in the universe
follow Kepler's laws

What are planetary nebula? - ✔ ✔ Planetary nebulas are relatively small gas
clouds of ionized hydrogen (H+) (which is why they glow) with low mass elements
like carbon and oxygen; they are celestial clouds of gas and dust where stars and
solar systems are born (made from space dust and return to it!) - (has nothing to
do with planet creation) emphasis on the nothing.

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