SCIENCE EXPLORER Earth Science ©Prentice-Hall, Inc.

21 Landform Regions of the United States

22 Exploring LandformsSC

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Plains

Mountains

Plateaus

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23 Determining Latitude and Longitude©

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24 Exploring Topographic Maps©

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V-shapedcontours

Hilltop

Index contourDepression

Contour lines

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25 Forces of Mechanical Weathering

Freezing andThawing

Release ofPressure

Plant Growth

AnimalActions

Abrasion

SCIENCE EXPLORER Earth Science ©Prentice-Hall, Inc.

26 Soil Composition and Soil Horizons

A horizonA horizon

B horizon

C horizon

C horizon

C horizon

BedrockBedrock Bedrock

SCIENCE EXPLORER Earth Science ©Prentice-Hall, Inc.

27 Exploring Living Organisms in Soil

A horizon

B horizon

C horizon

Litter

Insect larvaeBurrowing

animals(mouse)

Plant roots

Ants

Bacteria (decomposers)

Snails andbeetles Chipmunks

Earthworms

Fungi (decomposers)

SCIENCE EXPLORER Earth Science ©Prentice-Hall, Inc.

28 Soils of North America

SCIENCE EXPLORER Earth Science ©Prentice-Hall, Inc.

29 Landslide, Slump, and Creep

Landslide

Slump

Creep

SCIENCE EXPLORER Earth Science ©Prentice-Hall, Inc.

30 Exploring the Course of a River

Valleywidening

Delta

Oxbow lake

Flood plain

Beaches

Meanders

V-shapedvalley

Tributary

Oxbow lake

Waterfallsand rapids

SCIENCE EXPLORER Earth Science ©Prentice-Hall, Inc.

31 Water Erosion, Deposition, and Movement of Sediment

SCIENCE EXPLORER Earth Science ©Prentice-Hall, Inc.

32 Exploring Glacial Landforms

Moraine

U-Shapedvalley

Horn

Arête

FiordDrumlin

Kettle lake

Glacial lake

Cirque

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33 Wave Erosion and Wind Erosion

Wave Erosion

Wind Erosion