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Chapters 6,7,8
Studyguide
20
Astronomy
9th Grade
10/22/2009

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Cards

Term
Solar System
Definition
consists of 8 planets, and the sun
Term
Astronomical Unit
Definition
average distance of earth from the sun
Term
orbits
Definition
all planets orbit around the sun, XO-3b orbits tilted
Term
terrestrial planets
Definition
mercury, venus, mars, earth
Term
jovian planets
Definition
saturn, neptune, jupiter, uranus
Term
asteriods and meteors
Definition
rocky, like terrestrial planets
Term
comets
Definition
icy, like moons of outer planets
Term
layers of the earth
Definition
_________-crust
_________-mantle
_________-outer core
_________-inner core
Term
atmosphere
Definition
nitrogen, oxygen, argon, and carbon dioxide. layer of gas confined to a planets surface by force of gravity
Term
layers of the atmosphere
Definition
inosphere
menosphere
stratosphere
troposphere
Term
seismic activity
Definition
???
Term
magnetic field
Definition
field which accompanies any changing electric firld, and governs the influence of magnetized objects on one another
Term
auroras
Definition
atmosphere molecules excited upon collision with the charged particles fall back to their groundstates and emit light, increase: van allenbelts being distorted
Term
mercury and moon atmosphere
Definition
no atmosphere
Term
mercury and moons surface
Definition
moon- giant craters and bare
mercury- firy and hot
Term
mercury and moon motion
Definition
they have a synchronous orbit, meaning they always have the same side facing earth
Term
mercury and moon geological activity
Definition
inactive, eons ago
Term
scarp
Definition
cliff on a surface that does not appear to be result of volcanic or other familiar geological activity
Term
mercury and moon magnetic field
Definition
moon- shows a rapidly rotating liquid core is needed
mercury- field is strong enough to deflect a solar wind
Term
creation of the moon
Definition
many theorys, coformation theory
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