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Chapter 1, Changes to Earth’s Surface
Lesson 1
Landforms – physical features on the Earth’s surface
Weathering – process of breaking rock into silt, sand, clay, and sediment
Erosion – process of moving sediment from one place to another
Deposition – process of dropping, or depositing, sediment in a new
Mass movement – downhill movement of rock and soil because of gravity
Lesson 2
Crust – other layer of Earth, made of rock
Mantle – layer of rock beneath Earth’s crust
Core – center layer of Earth
Plates – rigid blocks of crust and upper mantle rock
Magma – molten rock from Earth’s mantle
Volcano – mountain formed by lava and ash
Earthquake – shaking of the ground caused by the sudden release of
energy in Earth’s crust
Faults – places where pieces of the crust move
Lesson 3
Continental drift – theory of how Earth’s continents move over its surface
Pangea – theory that 225 million years ago the Earth was joined together
in one supercontinent
Fossils – remains or traces of past life found in some rocks