# Have you ever gone long distance hiking?. A new map which can help us solve all these challenges! What observations can you make?

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Have you ever gone long distance hiking?

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

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?

Point to the contour line.

How many contour lines are there in this picture?

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?

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

Remember: Contour interval = height Scale = distance traveled

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

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

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

A topographic map of a mountain

Let’s start our journey on mountain climbing!

Let’s take a walk up a hill!

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

Now we’re at 200m. 100m 200m

Shall we march on? 100m 200m

We’ve made it to 300m! 100m 200m 300m

On to the peak! 100m 200m 300m

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

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

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

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

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

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

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

Each color change represents a 50 meter increase.

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

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

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

Let’s go a little higher.

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

More than 300meters But less than 350meters

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

More than 350 meters, less than 400 meters

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

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

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

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

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

(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.

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

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

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.

Let’s look at several major landforms Valley

Hill

Ridge

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

Plains the lines are farther apart

Depressions have hachure marks (p.7 #8)

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

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

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