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EES 2.1

TermDefinition
Plate Tectonics The theory that Earth’s crust is made of moving plates.
Geosphere The solid parts of Earth (rocks, soil, land).
Rock Cycle How rocks change from one type to another over time.
Convection Currents The flow of hot rock inside Earth that moves plates.
Earthquakes The flow of hot rock inside Earth that moves plates.
Continents Large land areas on Earth.
Crust The thin, outer layer of Earth.
Minerals Natural, solid materials that make up rocks.
Igneous Rock Rock formed from cooled lava or magma.
Sedimentary Rock Rock made from pressed layers of sediment.
Metamorphic Rock Rock changed by heat and pressure.
Seismograph A tool that records earthquake waves.
Magnitude The strength or size of an earthquake.
Tsunami A large ocean wave caused by an underwater earthquake.
Fault Line A crack in Earth’s crust where movement happens.
Magma Melted rock found under Earth’s surface.
Volcano An opening in Earth where lava, ash, and gas come out.
Lithosphere The crust and top part of the mantle.
Pangaea A supercontinent that existed long ago.
Continental Plane A large piece of Earth’s crust that holds land.
Richter Scale A scale that measures earthquake strength.
Density How tightly packed matter is in an object.
Divergent Plates moving apart from each other.
Ridgid Stiff or hard; not flexible.
Trenches Deep valleys in the ocean floor where plates meet.
Thermal Related to heat.
Mantle Thick layer of hot rock under the crust.
Continental Drift Continents slowly moving over time.
Seismic Waves Earthquake vibrations.
Outer Core Liquid metal layer around the inner core.
Transformation Boundary Plates sliding past each other.
Unstable Isotopes Atoms that break down over time.
Volcanism Movement of magma to Earth’s surface.
Seafloor Spreading New ocean crust forming at ridges.
S Waves Slow earthquake waves that move side-to-side.
Support For Wegener's Proposed theory Fossils, rocks, and climate clues matching across continents.
Ridge Raised area where new crust forms in the ocean.
Isotope A form of an element with different neutrons.
Convection Heat moving through rising and sinking material.
Asthenosphere Soft, flowing layer under the lithosphere.
Divergent Boundary Plates moving apart.
Fossil Preserved remains of ancient life.
Subduction One plate sinking under another.
Mantle Convection Heat flow in the mantle that moves plates.
Lava Melted rock on Earth’s surface.
Ductile Able to bend without breaking.
Magnitude Earthquake strength.
Plume Hot rock rising from deep in the mantle.
Half life Time for half of an isotope to decay.
Thermal Convection Heat moving by rising hot material.
Tectonic Plates Large moving pieces of Earth’s crust.
Inner Core Solid metal center of Earth.
Radioactivity Energy released from unstable atoms.
Radioactive Decay Unstable atoms breaking down over time.
Inner Core Unstable atoms breaking down over time.
Convergent boundary Plates moving toward each other.
Mountain Formation Mountains created when plates collide.
Epicenter Point on Earth’s surface above the earthquake start.
P Waves Fast earthquake waves that push and pull.
Alfred Wegener Proposed continental drift theory.
Slab Pole Sinking plate pulling the rest of the plate with it.
Rift A crack where plates are pulling apart.
Created by: user-1996990
 

 



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