Changes to the Earth Words 125 - 140

16 terms by carnesm

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Agent of erosion and weathering

wind, water, ice, and waves are the forces that cause weathering and erosion

weathering

The breaking up of earth materials into smaller pieces and wearing away of rock.

Erosion

The movement of weathered sediments by water, wind, or ice.

Deposition

The process where sediment eroded by wind, water, or ice is dropped in a new place.

Delta

soil which is deposited at the mouth of a river, usually in a triangular shape.

Canyon

a valley between steep cliff sides formed by running water, such as a river or stream

Sand Dune

a hill of sand created by the wind

Striation

Grooves of scratches found in surface rock that are the result of glacial abrasion

Glacier

A large mass of slowly moving ice and snow that carves new features and deposits sediments

Landform

A natural geographic structure on Earth's surface.

Fossil

Evidence of ancient past life, such as petrified wood, dinosaur

Paleontology

a scientist (paleontologist) who studies ancient life using fossils

MYA

Million of Years Ago

Prehistoric

before recorded history

Extinction

death of an entire species.

Mass Extinction

Extinction on a large scale, such as the extinction of the dinosaurs.

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