Presentation on theme: "Have you ever gone long distance hiking?. A new map which can help us solve all these challenges! What observations can you make?"— Presentation transcript:
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
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
Grab a white board and write your answers to the following questions. Ready?
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
about 400 meters
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
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