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Plate Tectonics
Science Test
11 cards·by Mrs. Harrington
What is the inner core?
A solid, iron-rich sphere at the center of the earth
What is the outer core?
A fluid, metalic layer surrounding the inner core
What is the mantle?
A solid rocky layer between the outer core an crust. It is the thickest layer, making up about
83% of the earth's interior
What is the crust?
The earth's outer layer. It is the earth's very "thin" skin
What is the asthenosphere?
The hot layer of the mantle that lies directly below the lithosphere and flows like taffy
What is the lithosphere
Cool, solid outer shell of earth. Consists of crust and rigid upper most part of the mantle.
Broken up into segments or plates
Divergent plate boundary
2 plates move appart 1. Seafloor spreading 2. continental rifting 3. Land masses split in two
What is a convergent plate boundary
2 plates move together 1. ocean trenches 2. volcanoes 3. mountains (DESTROYS OLD
LITHOSPHERE)
What is a transform fault boundary?
Occurs when 2 plates grind past each other 1. Earthquakes 2. Offset stream channels
What is a sedimentary rock?
A solid earth material composed of compacted and cemented sediements or of particles of
various sizes.
What is an igneous rock?
A solid earth material that forms when magma or lava cools and crystallizes on or below the
earth's surface.