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Planets Moons and Rings > Exam 1 > Flashcards

Exam 1 Flashcards

1
Q

How was the moon created

A

Splashed off earth as giant impact

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2
Q

maria

A

large balsaltic plains on moon

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3
Q

minerals

A

solid chemical compounds

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4
Q

rocks

A

mix of minerals

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5
Q

mafic rocks

A

more magnesium and iron, denser, more viscous, brighter

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6
Q

sialic rocks

A

lighter, more viscous, brighter

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7
Q

differentiation

A

denser rocs sink to core, lighter rocks rise to surface

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8
Q

igneous rocks

A

from molten rock

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9
Q

metamorphic rocks

A

reworked from heat and pressure

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10
Q

sedimentary rocks

A

transported by water, rain, wind

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11
Q

breccias

A

fused broken rocks

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12
Q

Parts of the earth

A

crust, mantle core

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13
Q

heat sources of earth

A

accretion, differentiation, radioactivity, tides

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14
Q

isostatic compensation

A

planet floats on mantle at an elevation which depends on its thickness and density. (mountains are less dense an have roots)

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15
Q

tectonics

A

movements in the planet’s crust

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16
Q

what does extension in tectonics create?

A

normal faults

17
Q

what does compression in tectonics create?

A

reverse or thrust faults

18
Q

what does shearing in tectonics create?

A

strike slip

19
Q

evidence for plate tectonics

A

magnetic stripes, continents fit, ring of fire, marginal mountains, ocean trenches, mid-ocean ridges, seafloor spreading

20
Q

volcansim

A

erruption of molten rock

21
Q

how do impact craters form

A

instantaneous release of impactors kinetic energy due to the speed of the impact

22
Q

Stages of craters

A
  1. detonation
  2. excavation/ejection
  3. rebound
  4. collapse
  5. relaxation
23
Q

keplers 3 laws

A
  1. all planets move in elliptical orbits around the sun
  2. orbit sweeps out area at a constant rate
  3. harmonic law p^2 = a^3
24
Q

trojans

A

stable triangular lagrange points

25
Q

what does temp of a planet represent?

A

average motion of the molecules

26
Q

3 ways to transport energy

A

conduction, convection, radiation

27
Q

inertia of a sphere

A

2/5MR^2

28
Q

mean angular frequency

A

n=2pi/P

29
Q

resonances

A

where the mean motion of one object is the ratio of small integers to another, allowing small forces to build over time

30
Q

libration

A

wiggle around an equilibrium point

31
Q

Why is pluto not a planet

A
  1. orbit is eccentric an inclined
  2. small size (2/3 or the moon)
  3. composition of rock and ice
32
Q

KBO

A

Kuiper Belt Object (pluto is the second biggest)

33
Q

inner planets

A

earth/terestrial - solid - (Detritus = rocky -> astroids)

34
Q

outer planets

A

jupiter, jorian - gas - icy (Detritus = comets kuiper belt objects)

35
Q

Def of planet

A

orbits the sun, spherical, has cleared the neighborhood around it, orbit

36
Q

test

A

test

Planets Moons and Rings (3 decks)

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