Weathering, Erosion and Deposition

What is spelunking?

Cave exploring

Lesson Vocabulary words

• Weathering• Physical weathering• Chemical weathering• Erosion• Deposition

Physical Weathering Changes RocksAbrasion from wind and moving

sedimentGlaciers scratching rocksPlant roots and animals breaking rocksFreezing icePressure changes

Chemical Weathering Changes Rocks

Plants releasing compounds into rock and soilLichens that release acidsOxidationAcid rainGroundwater

Movement of sediment by wind, water, ice and gravity is called .EROSION

3 causes of Erosion other than wind.

GravityMoving waterGlaciers

How do wind and water change landscapes?

Wind and water can create sediments from rocks, erode, then deposit at a different location.

Weathering and Erosion on a Coast

Both _______________ and ___________________ cause weathering, erosion and deposition along coastlines.

________________ ________________ can form as water erodes and abrades the land to create a deep hollow.

waves

currents

Sea Caves

Deposition along a coastline

When an agent of erosion drops sediment or rock, ____________________ is taking place.

A __________________ is a triangular feature that forms when a river enters another body of water.

Large mounds of sediment dropped parallel to the shore are called _________________ islands.

Are all beaches sandy?

When waves and currents deposit sand perpendicular to the shore, a feature called a _________ forms.

deposition

delta

barrier

no

spit

Features formed where river meets ocean

Moving ______________, in the form of _______________ and _______________, weathers, erodes, and deposits sediment to shape and reshape the many types of land features that form along a coastline.

water wavescurrents

Deposition by water and wind

Like a delta, an __________________ fan is a triangular deposit, but it forms on land.

Although flooding can be dangerous to people living near a river, floods _______________ the soil on a floodplain.

 

__________________ __________________ happen quickly to change the land.

__________________ are depositional features that form when wind drops large volumes of sediment, such as sand and silt, in the same place.

Alluvial

enrich

Flash floods

Dunes

Deposition by glaciers ______________________ are large masses of ice that move slowly

over Earth's surface.

Till is _____________________ of any size that's dropped by a glacier, it is unsorted and can be any size.

Glacial _________________ are ridges full of till.

Glaciers

sediment

moraines

Alluvial fans

An ____________________ ____________ forms when a stream quickly goes from a steep slope to flatter land. Over time, the stream forms a triangular deposit here.

Alluvial fan

Earth processes

_______________________ is any process that changes a rock's size or its composition.

When agents of change (wind, water, gravity, and ice) stop or slow down, they drop, or ________________, the sediment to form a variety of land features.

Weathering

deposit

Review

The rocks that make up Earth's land features are continually __________________ by natural processes.

Water, ice, wind, gravity, and living organisms cause land features to constantly

_____________________________ is a natural process that can change and break down rock.

________________________ is the process by which the products of weathering are moved from place to place.

_______________________ is the process by which eroded materials are dropped.

reshaped

change

Weathering

Erosion

Deposition