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Earth vocabulary
about 2/18/05 science quiz
23
Science
Not Applicable
02/17/2005

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Term
Siesmic Waves
Definition
Change speed and direction depending on the density and material they travel through
Term
Hot Spots
Definition
Formed by plumes of magma in the mantle and can cause underwater volcanic mountains
Term
Fault-blocked Mountains
Definition
Form from huge tilted blocks of rock separated from surrounding rock by large faults
Term
Folded Mountains
Definition
Formed by compression forces folding rock layers
Term
Up-Warped
Definition
Forces push up Earth's crust and allow the sedimentary rock to erode, leaving igneous or Medimorphic rock
Term
Volcanic Mountain
Definition
Cone-Shaped mountain formed from layers of cooled lava
Term
Isostasy
Definition
Principle that indicates Eath's crust and lithosphere float on the upper mantle
Term
Continental Crust
Definition
Under continents and usually thick under mountains
Term
Oceanic Crust
Definition
Thin under oceans and denser than continental
Term
Subduction
Definition
Occurs when a denser plate sinks underneath a less dense plate
Term
plates
Definition
sections of the Lithosphere
Term
Mantle
Definition
flows like putty and is largest layer of Earth. Solid
Term
Outer Mantle
Definition
Liquid molten metal above innercore
Term
inner core
Definition
dense iron core:very hot and dense. Solid due to pressure
Term
lava
Definition
magma on Earth's surface
Term
bounderies
Definition
edges where plates meet
Term
Ridge-Push
Definition
occur at mid-ocean ridges snd causes plate to slide down the slope
Term
Slab-Pull
Definition
Happens as plates move away from mid-ocean ridges and become denser
Term
shearing
Definition
causes faults and earthquakes as two plates slide past each other
Term
fault
Definition
fracture in rocks where movement occurs
Term
convection
Definition
caused by uneven heating and differences in density
Term
tension
Definition
another word for a pulling force
Term
1.Rising Magma fills the magma chamber
2.Lava flows through the pipe
3.Lava reaches the vent
4.lava collects at a crater
5.Lava flows down the volcanic mountain
Definition
five steps of a volcanic eruption
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