Download Unit 2 Vocabulary – Plate Tectonics

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Basalt wikipedia, lookup

History of geomagnetism wikipedia, lookup

Schiehallion experiment wikipedia, lookup

Post-glacial rebound wikipedia, lookup

Nature wikipedia, lookup

Age of the Earth wikipedia, lookup

Tectonic–climatic interaction wikipedia, lookup

Geochemistry wikipedia, lookup

Algoman orogeny wikipedia, lookup

Oceanic trench wikipedia, lookup

History of Earth wikipedia, lookup

Geology wikipedia, lookup

History of geology wikipedia, lookup

Abyssal plain wikipedia, lookup

Earthscope wikipedia, lookup

Geophysics wikipedia, lookup

Mantle plume wikipedia, lookup

Large igneous province wikipedia, lookup

Plate tectonics wikipedia, lookup

Transcript
Name ________________________________________
Earth and Space Science Course 320
Date ___________
Unit 2 Vocabulary – Plate Tectonics
crust – solid, rocky outer layer of Earth
mantle – solid middle region of Earth
inner core – solid iron/nickel center of Earth
outer core – liquid iron/nickel layer above the inner core
continental crust – the thicker part of the crust that makes up the continents and consists mainly of rocks
such as granite (low density, light color).
oceanic crust – the thinner part of the crust that makes up the ocean floor. It is made up of primarily basalt
(higher density, dark color).
lithosphere – the layer of Earth made up of the crust and upper mantle
asthenosphere – the plastic-like, but solid, layer in the mantle which allows the lithosphere above to move
continental drift hypothesis – the continents once formed a giant landmass (Pangaea), broke apart, and
then drifted to their current locations
mid-ocean ridge – a continuous mountain chain on the floor of all major ocean basins
seafloor spreading – process where the sea floor spreads apart along both sides of an oceanic ridge as new
crust forms from molten rock at the center.
subduction zone – an area where oceanic crust is forced down into the mantle beneath another plate
plate tectonics theory – changes in Earth’s crust, including the movement of continents, is caused by the
slow movement of large plates
plate – section of the lithosphere usually made up of both oceanic and continental crust
divergent boundary – plate boundary (edge) where two plates diverge, or move apart, and new crust or
lithosphere is formed
convergent boundary – plate boundary where two plates converge, or come together
transform fault boundary – plate boundary where two plates slide past one another with no creation or
destruction of lithosphere
hot spot -- stationary plumes of magma that rises up causing volcanic activity
1