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Chapter 9 Vocabulary (West)
Science words for Mrs. West's class Chapter 9
23
Science
5th Grade
10/22/2010

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Term
magma
Definition
melted rock forming substance inside the earth's mantle.
Term
lava
Definition
the magma that reaches the surface of the earth.
Term
intrusive
Definition
a type of igeous rock that cools slowly and has large crystals.(inside)
Term
extrusive
Definition
a type of ignoeus tock that cools quickly and has small crystals(outside)
Term
abyssal plain
Definition
a large mostly flat region on the ocean floor.
Term
sea mount
Definition
an undersea volcanic mountian found on the ocean floor
Term
subdecuion
Definition
the proess by witch one lithospheric plate is forces under another
Term
deep ocean current
Definition
a sttream of water that flows deep beneath the ocean's surface
Term
corilis effect
Definition
the way earth's rotation affects wind and ocean currents.
Term
EL Nino
Definition
a periodic change in oceanic and atmosphere condition causing unusually warm surface water.
Term
upwelling
Definition
the movemment of cold cold ocean water to the ocean surface
Term
polarity
Definition
the quality of having two oppsite poles one posivity and one neative.
Term
rock cycle
Definition
rocks change in a perdictable pattern known as the rock cycle.
Term
theory of plate tetonics
Definition
was partly shaped by the continental drift theory.
Term
density
Definition
the measure of how compact matter is where mass is campared to volume.
Term
salinity
Definition
affects and global climates
Term
igneous
Definition
rocks form when magma or lava cools and hardens
Term
sedimentary rock
Definition
forms when small pieces of other rock minerals plandts and animals are deposited in lauers typically as a result of weatherig and ersion
Term
metamotphic rocks
Definition
forms when larhe amiunts of heat and presser are applied to other rocks types.
Term
lithosphere
Definition
The crust and the upper mantel
Term
convergent boundary
Definition
When two plates collide
Term
divergent boundary
Definition
occur when two plates pull apart
Term
transform boundarys
Definition
Relieves some tension on the lithospheric plates as they slide past one another.
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