Term
| What are the two surfaces of the moon |
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Definition
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Term
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Definition
Low albedo (dark)
Few craters
Young
Lava flows |
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Term
| Facts about the highlands |
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Definition
High albedo
Many craters
Old
Original crust of the moon, with lots of impacts |
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Term
| When a meteorite hits the surface of the moon what creates the perfectly circulare crater. |
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Definition
| The meteorite his at such large speeds that it explodes. |
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Term
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Definition
The energy of moving objects
KE=(1/2)Mass X Velocity2 |
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Term
| What moves faster: a fastball, the speed of sound, a rifle bullet, the explosion of TNT, or a meteorite? |
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Definition
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Term
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Definition
| The rock formed when a meteorite hits the surface of a planet shatters the rock in the ground and then fussed it back in to breccia. |
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Term
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Definition
Less then 10pm across.
Basic bowl shaped
The rim sticks up above the surface |
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Term
| Where is the oldest ejecta from a meteorite impact |
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Definition
At the rim of the crater.
It is also from the deepest layers. |
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Term
| If a crater is 200m across, the rock at it's rim will come from _____ deep |
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Definition
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Term
| If the rock at a craters rim comes from 10km deep what Is the diameter of the crater? |
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Definition
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Term
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Definition
Between 10km and 100km across
They have central peaks and terraced rims |
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Term
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Definition
The rise at the center of a complek crater
It is the oldest rock exposed from a meteorite impact |
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Term
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Definition
| The feature at the rim of the complex crater |
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Term
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Definition
Craters larger then 100km across
Meteorites that cause them are the size of cities |
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Term
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Definition
| When mettiors impact the ejecta can often create craters themselves. The ejected material does not move nearly as fast as a meteorites so the secondary craters are not perfectly round |
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Term
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Definition
Craters that have been altered after they were created
Often they are filled in with lava |
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Term
| What is the source of heat in a planet or moon that allows geologic activity? |
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Definition
Radioactive decay
It produces a lot of energy which heats the planet from within |
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Term
| What are the three main radioactive substances heating the moon and planets? |
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Definition
Potassium (K)
Thorium (Th)
Uranium (U) |
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Term
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Definition
A layered planet based on density of the material within the planet.
Just like oil and water when a planet is hot and melted the different types of material separate based on density. The higher density material moves to the center. |
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Term
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Definition
Lava channels formed by lava flowing across the surface of the moon or a planet.
Or, faults cutting into the surface of the moon |
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Term
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Definition
| As. Lava flow cool the top that is exposed to the air will cool first forming a roof to the lava flow. The lava then flows through the Tube crated sometimes filling it in sometimes leaving empty. |
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Term
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Definition
Resistance to flow
Low viscosity= runny, it flows a long distance ( like the basaltic lava on the surface of the moon)
High viscosity= chunky, does not flow. |
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Term
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Definition
Extensional= faults pulling apart the surface of the moon
Compressional= folds and faults pushing together the surface of the moon |
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Term
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Definition
| Wrinkles in the surface of the moon caused by compression of the surface. |
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Term
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Definition
Global= the age of the entire surface of the planet
Local= the age of a single rock |
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Term
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Definition
| Absolute= the exact age of rock, you must use radioactive dating, you need to bring the rock home to get an absolute age |
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Term
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Definition
Age of a rock based on it's relation to the rocks around it.
Stratigraphy= the rock at the bottom will always be older then the rocks above it
Features overlapping others are younger then the features they overlap |
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Term
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Definition
Graph comparing crater size on the x-axis, vs. number of craters on the y-axis.
The lines on the graph are always parallel, there will always be more small craters then large craters.
The higher the line on the graph the older the surface |
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