CH 8 Erosion

8-8 What kind of lake is created when a block of glacial ice melts?

Kettle Lake

8-2 What is talus?

Pile of rocks and sediment that collect at the bottom of a slope

What is deposition?

Process by which materials are dropped in new places

8-1 What is erosion?

The natural process by which soil and sediment are transported (moved) from one location to another

What is loess?

Thick, powdery deposits of fine sediment (wind blown dust)

What are sand dunes created by?

Wind erosion and deposition

8-11 How does wind erosion work?

Wind removes soil, sand, and rock particles and transports them from one place to another.

8-1 What are the 5 agents of erosion? What 5 things move sediments?

Wind, Water, Waves, Gravity, Glaciers

8-5 Why does Karst topography develop where the underground rock is limestone?

because when the water in the ground seeps through layers of rock, it mixes with the carbon dioxide in the rock= this forms carbonic acid when carbonic acid connects with limestone rock, a chemical reaction takes place And the limestone is weathered or broken down by the acid

8-2 evidence of landslide, mudflow, earthflow, or creep: the fence posts on a slope are tilting slightly

creep

8-11 what is the crest, slip face, and windward side ?

crest- top slip face- the side of a mountain that faces away from the wind windward side- the side of a mountain that faces into and is hit directly by the prevailing winds

8-10 What is a spit?

curved deposit of sand connected at one end to the shore

8-1 example of erosion or deposition? broken shells found along the shoreline after the tide goes out

deposition

8-1 example of erosion or deposition? soil from an open field is blown into piles along a stone wall

deposition

8-11 sand dunes are formed by ????

deposition

8-2 what is mass erosion?

downhill movement of weathered materials caused by gravity

8-8 What are oval mounds of till left by a retreating glacier?

drumlins

8-2 evidence of landslide, mudflow, earthflow, or creep: a hillside slowly slides down toward the buttom

earthflow

8-1 example of erosion or deposition? during a storm, sand is washed out from under a beachfront house

erosion

8-1 example of erosion or deposition? rocks at the top of a hillside begin to tumble down the hill

erosion

8-3 will a fast moving or slow moving river carry more soil?

fast moving

8-4 what is a floodplain?

flat area on the side of a river where sediments are deposited during floods

8-6 What is a ice cap?

glaciers that form near the poles

8-11 define abrasion

is the mechanical scraping of a rock surface by friction between rocks and moving particles during their transport by wind, glacier, waves, gravity, running water or erosion.

8-7 What happens to the shape of a valley as the result of glacial erosion?

it becomes U shaped called hanging valleys

8-10 What is a barrier beach?

it forms when a sandbar reaches above the water

8-2 evidence of landslide, mudflow, earthflow, or creep: a car driving on a mountain road must swerve to avoid falling rocks

landslide

8-7 what is a erratics?

large boulders left behind by a retreating glacier

8-5 define sinkhole

large hole in the ground formed when the roof of a cavern collapses

8-10 what is a sand bar?

long offshore underwater deposit of sand parallel to a shoreline

8-8 What is a ridge of till deposited by a melting glacier?

moraine

8-10 What is a long shore current?

movement of water parallel to a shoreline

8-6 What is a glacier?

moving river of ice and snow; Massive moving ice block capable of eroding, moving, depositing large amounts of rock material.

8-2 evidence of landslide, mudflow, earthflow, or creep: mud from a heavy rain blocks a road at the base of a mountain

mudflow

8-3 what is runoff?

rain water that empties into lakes or rivers

8-11 define deflation

removal of loose material from Earth's surface from wind

8-7 What is till?

rock and sediment left behind by a melting glacier

8-10 difference between sand bar and barrier beach?

sand bar=underwater barrier beach=above water

8-9 what is a gap formed when waves cut through a section of rock?

sea arch

8-9 What is a hollowed-out part of a sea cliff?

sea cave

8-9 What is a steep rock face caused by wave erosion?

sea cliff

8-9 What is a column of rock remaining after the collapse of a sea arch?

sea stack

8-5 define cavern

series of connected underground caves

8-5 Name 3 features of Karst topography

sinkholes, cavern, caves,

8-11 slip face side of a sand dune has a ??? slope

steep slope

8-11 define loess

thick deposits of wind blown dust

8-4 what is a delta?

triangular deposits of sediment located at the mouth of a river

8-9 what is a flat section of rock formed by erosion of a sea cliff?

wave cut terrace

8-4 What is abrasion?

weathering caused by materials carried by wind or water

8-11 what causes a dune to move or migrate?

wind