Chapter 3, Section 3

Standards IE 1h. Read and Interpret topographic and geologic maps.

Objective 1 Explain how elevation and topography are shown on a map.

Objective 2 Describe three types of information shown in geologic maps.

Assessment Mapping Practice Sheet, Daily Quiz, Chapter Test

Review Daily Bellwork, Science Starters, Standards Practice

Key Terms

Create a flash card for the following key terms (p. 63 in textbook):

TopographyElevationContour lineRelief

If you finish early, study your flash cards!

Topographic Maps

• Topographic maps show the surface features of a location.• They include rivers, hills, roads, and

more.• A topographic map also shows

elevation = height above sea level.

Animated Topographic Maps

Topographic Maps The lines show the contours and elevation of the island.

Advantages of Topographic Maps

Detailed info about surface features

Show’s size and shape

Show’s elevation

Elevation on Topographic Maps

• Contour Lines are used to show elevation.• Contour Lines are the wavy lines and each line

represents a new elevation (height from sea level).

• The difference in elevation between one contour line and the next is called the contour interval.

• Relief is the difference in elevation between the highest and lowest points of the area being mapped.

Contour Lines

Contour Lines

Quick Check!!

1. A __________ _________ is the difference in elevation between one contour line and the next.

2. Name an advantage of a topographic map. _______________________________________________________________________________________________________________

Landforms on Topographic Maps

• Contour lines spaced widely apart indicate a gradual change in elevation, whereas lines close together indicate and rapid change in elevation or a steep slope.• A ‘V’ shape indicates a valley, the

point is the highest end.

Practice• What kind of landform

is represented by this contour map:a) Lakeb) Canyonc) Hilld) Valley

• What is the lowest elevation on the map? ________

• What is the elevation of point A?_________

A

Practice• What kind of landform

is represented by this contour map:a) Lakeb) Canyonc) Hilld) Valley

• What is the lowest elevation on the map? ________

• What is the elevation of point A?_________

A

Topographic Map Symbols• Buildings, boundaries, roads = black.• Major highways = red.• Water = blue.• Forests = green

INTERACTIVE!• Frayer Diagram: TOPOGRAPHIC MAPS• Complete and then tape/glue onto interactive side of

your notebook.

Topographic Maps

Definition Illustration

Advantages Contour Lines

Geologic Maps• Geologic maps show types of rocks and the

locations of faults, folds, and other structures.

• Geologic Units are a volume (section) of rock from the same age range and rock type and are shown in the same color.

• Letters are also used to label the types and ages of the rock on the map.

• Used by engineers, geologists, developers

Geologic Maps

• Contact Lines—places at which 2 geologic units meet.

• The place at which 2 geological units meet is called a “Contact”. – 2 main types of Contacts are: faults and

depositional contacts (one layer of rock formed on top of another)

Assessment

Playdoh Mountains

Daily Quiz