Layers of Earth, earthquakes, volcanoes and landforms Test

26 terms by armstrong3

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fault

break in the Earth's crust along which rocks move

core

deepest layer of Earth, at the center of the Earth

glacier

a huge mass of ice that moves slowly and erodes the land

epicenter

point on Earth's surface right above the focus of an earthquake

soil

tiny bits of rock, mixed with decayed organisms in which plants can grow

focus

underground point where an earthquake first starts

seismograph

instrument that records earthquake waves

frost action

the breaking aprat of rocks by freezing water pushing against the sides in rocks

crust

they layer of Earth that includes land and ocean floor, what we stand on

plates

continental-sized slabs that make up the crust and upper mantle

weathering

the breaking down of rocks

erosion

the wearing away and moving of materials by water, wind and ice

hills

rise higher than the land around it but not as high as a mountain

earthquake

the shaking of the Earth's crust

mantle

thickest layer of the Earth, made of solid and melted rock

plateau

rises above the land around it, but is flat on top

mountain

highest form of land on Earth

Ice Age

a period of time when part of the Earth was covered by glaciers

valley

low land between a group of mountains or hills

volcano

a mountain that forms when melted rock flows through a crack onton the Earth's surface

lava

melted rock that reaches Earth's surface

crater

a large basin formed at the top of a volcano

magma

melted earth inside Earth

magma chamber

an underground pool that holds hot magma

vent

a rocky opening through which magma flows

Richter Scale

a scale by which scientists can measure an earthquake

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