Physical Universe - Unit 3
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Last updated 10:52 PM on 11/6/22
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55 Terms
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Asteroid
A large rocky body in space
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Meteroid
A small rocky body in space
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What is the largest asteroid?
Ceres
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Comets
A rocky and icy object revolving in interplanetary space around the sun
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What are the comet tails?
Dust tail and ion tail
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What are comet's orbit?
Dramatically elliptical
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Where are most comets from?
Oort Cloud
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What makes a planet?
Orbits sun, be massive enough so own gravity creates round shape, and clear own neighborhood of smaller objects
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What are dwarf plants?
Ceres, Pluto, Eris, Makemake, Haumea
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Kuiper Belt
Celestial region outside of Neptune that harbors objects
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What planet orbits the fastest?
Mercury
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What planet orbits the slowest?
Neptune
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What planet rotates the fastest?
Jupiter
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What planet rotates the slowest?
Venus
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Who is the king of gods?
Jupiter
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Who is Zeus's father?
Saturn
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Who is god of the sky
Uranus
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Who is god of the sea?
Neptune
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Who is the messenger of gods?
Mercury
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Who is the goddess of beauty?
Venus
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Who is the god of war?
Mars
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Jupiter Belts and Zones
Move in opposite directions
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Zones
Warm rises
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Belts
Cold sinks
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What are most planets made of?
Hydrogen and Helium
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What is the least dense planet?
Saturn
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Which planet was predicted?
Neptune
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Who discovered Uranus?
William Herschel
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What planet rotates on its side?
Uranus
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Which planet has the biggest temp difference?
Mercury
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Effect of mars having no atmosphere
Large temp changes since no retain heat
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Size of Venus
Is similar to earth
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Which planet spins backwards?
Venus
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What is in Venus's atmosphere?
Sulfur
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Which planet has the largest canyon and mountain?
Mars
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Why does Mars have robust cratering?
Has little atmosphere
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What are the Galilean Moons?
Ganymede, Callisto, Io, Europa
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Ganymede
Largest moon in solar system
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Callisto
Most cratered object in solar system
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Io
Most volcanic moon in solar system
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Europa
Planet with shell of frozen water
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Titan
Largest moon of Saturn, has lots of hydrocarbons
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Enceladus
Most reflective object in solar system, causes E rings, cryovolcanoes eject water
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Three Stages of Nebular Theory
Cloud Collapse, Condensation and Planet Formation, Final Sweep-up
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When does Nebular Theory end?
When sun starts nuclear fission
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What is Cloud Collapse?
Gravity causes a disk of mass to form with a protostar center
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Frost Line
Line between hot and cold planets.
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How did terrestrial planets form?
Particles of rock and metal aggregate to form planetesimals
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How did Jovian planets form?
Metal, rock, and ice collide, which creates more mass
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What is the Final Sweep-up?
Left over planetesimals bombard late states of solar system formation
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Giant Impact Theory
Large object collide with earth, moon forms as a result
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Rotational Inertia
Tendency of an object to maintain its current state of spin
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Conservation of Angular Momentum
Total momentum doesn't change
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Which has higher rotational inertia? Ring or Quarter?
Ring
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Which has a higher rotational speed?
Ring or Quarter?
Ring or Quarter?
Quarter