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Published byShawn Winchell Modified over 2 years ago

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Have you ever gone long distance hiking?

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A new map which can help us solve all these challenges! What observations can you make?

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First important definition Contour lines join points of equal elevation (height) above a given level, such as sea level. Try p. 7 #1 What cities are at the same elevation?

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Point to the contour line.

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How many contour lines are there in this picture?

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Second important definition The vertical distance between the elevations represented by two neighboring contour lines on a map is called contour interval. P. 7 #2 What is the contour interval? P.7 #3 What is the contour interval?

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Key words: neighboring and vertical Contour intervals show differences in height Scales show differences in distance

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Remember: Contour interval = height Scale = distance traveled

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Notice, not every line is labeled. How can you figure out the height of the unlabelled lines?

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What is the contour interval in this picture? What is the height of the most inner contour line/ line X?

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Third important definition A map using contour lines to show changes in elevation (height) is a topographic map.

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A topographic map of a mountain

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Let’s start our journey on mountain climbing!

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Let’s take a walk up a hill!

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We’re now at an elevation of 100 meters. 100m

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Now we’re at 200m. 100m 200m

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Shall we march on? 100m 200m

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We’ve made it to 300m! 100m 200m 300m

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On to the peak! 100m 200m 300m

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We’re on the peak, but what’s our elevation? 100m 200m 300m

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Any ideas? 100m 200m 300m Let’s add contour lines for every 50 meters and see if that helps.

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100m 200m 300m We know that we are above 350m, but less than 400m. 50m 150m 250m 350m

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100m 200m 300m Let’s head down the hill, it’s getting late! 50m 150m 250m 350m

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100m 200m 300m Now what’s our elevation? 50m 150m 250m 350m

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100m 200m 300m What’s our elevation now? 50m 150m 250m 350m

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Let’s now look at the same hill, but the way we might see it from an airplane!

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Each color change represents a 50 meter increase.

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Now, let’s try the same hike! Our elevation is 0 meters and the contour interval is 50m.

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What is the elevation that the man is at? Remember the contour Interval is 50m. The first line is 0m.

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If you said more than 150 meters, but less than 200 meters your right!

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Let’s go a little higher.

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Think you know our elevation now? (50m is contour interval)

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More than 300meters But less than 350meters

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If we were standing on the peak, what would be our elevation? (50m contour interval)

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More than 350 meters, less than 400 meters

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Let’s see what you know. 400m 800m 1000m 1200m A B C D E F 600m

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Grab a white board and write your answers to the following questions. Ready?

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1. What is the possible elevation at B? 400m 800m 1000m 1200m A B C D E F 600m

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The elevation must be under 1400 meters, but over 1300 meters.

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2. What is the elevation at (E)? 400m 800m 1000m 1200m A B C D E F 600m

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about 400 meters

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3.What is the elevation difference between (A) and (B)? 400m 800m 1000m 1200m A B C D E F 600m

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(A) is probably close to the 750 meter line, (B) is above 1300 meters. The difference between the two would probably be 650 to 700 meters.

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5. If you walked a straight line from (D) to (C) would you walk over a ridge or down a valley? 400m 800m 1000m 1200m A B C D E F 600m

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Down a valley first you are going down, then you are going up again.

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Easy way to judge geological features- write this down 1. If you are going in a direction, and the number is going up, that means you are going uphill. 2. If you are going in a direction, and the number is going down, that means you are going downhill.

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Let’s look at several major landforms Valley

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Hill

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Ridge

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Steeper slopes, lines are closer Read rules for profiles on p.8

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Plains the lines are farther apart

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Depressions have hachure marks (p.7 #8)

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Stream: v-shaped lines-they point upstream (top) (p.7 #9)

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Valley-u-shaped and the elevation is going down. Ridge if the elevation is going up

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