Topographic maps EQ: Why does the surface of the Earth change? Starter: 1/21/ Topographic maps 1/21/2016 Practice: Write observations here and Draw your picture here Connection: Worksheet Exit: The rocks found on river banks are smooth and circular in shape. Explain what natural phenomenon you think is responsible for the circular shape of the rocks. Application: Paste Notes Here What type of plate boundary is shown in the picture. What geologic event can occur here?

Starter What type of plate boundary is shown in the picture. What geologic event can occur here? Transform Boundary Earthquake

January 21, 2016 AGENDA Objective 8.9 B Students will relate plate tectonics to the formation of crustal features by reading and writing during Tectonic Landforms activity 1 Starter 2. Activity 3.Notes 4. Ws 5. Exit

DateLecture/ Activity/ Lab Page Table of Contents 1/19 Tectonics Review /21 Topographic Maps

Practice Close your hand into a fist with the fingers and thumb facing away from you. Now pretend you are a tiny ant crawling across a fist. From the ant’s point of view, what landform does the ridge of your knuckles look like? How are your knuckles and a mountain range similar ?

Practice Lay the rectangle of plastic wrap horizontally across the knuckles of your fist. Pull the overhanging section of plastic wrap on the outside of their hand underneath your palm and hold it in place with your thumb. Hold the other hanging piece to your palm.

Practice Draw a line around each of your knuckles across the top of the fist. Draw a second line around the outside of the first line on each knuckle. Draw one line around all four knuckles. Discuss and write your observations

Topographic maps EQ: Why does the surface of the Earth change? Starter: 1/21/ Topographic maps 1/21/2016 Practice: Write observations here and Draw your picture here Connection: Worksheet Exit: The rocks found on river banks are smooth and circular in shape. Explain what natural phenomenon you think is responsible for the circular shape of the rocks. Application: Paste Notes Here What type of plate boundary is shown in the picture. What geologic event can occur here?

Reading and Interpreting Topographic Maps

Topographic Map A map that show the elevation of the land, such as hills and valleys, using contour lines.

Elevation A term that describes the height of a point on Earth’s surface above (or below) sea level. This point is 6300 feet (1920 meters) above sea level.

Features of a Topographic Map Natural Features –Rivers, lakes –Mountains Artificial (man made) features –Cities –Roads, bridges

Parts of a Topographic Map Contour Lines –A line that connects points of equal elevation –Used to show features of the land Mountains, valleys, etc

Spacing of contour lines depends on steepness of slope  Close = steep slope  Far apart = gentle slope

Types of Contour Lines Or Gentle

Contour Interval The difference in elevation between one contour line and the next Spacing of lines depends on slope characteristics

Index Contour A darker, bolder contour line that indicates a change in elevation Usually found every fifth contour line

What is the contour interval in this example? 20

What does contour line spacing indicate? The closer together the contour lines are, the steeper the hill is. The more spread apart they are, the gentler the slope. Traveling along the red line would be much steeper than traveling along the green line.

Which way is the stream flowing? When contour lines cross a stream or river, they form v- shaped kinks in the lines that always point upstream. Also remember - Water always flows DOWNHILL! Blue Creek flow towards the East.

Finding the hill tops Hill tops are easy to find. Just look for the concentric closed contour lines that form the top of a hill. Notice the contour lines that form the two peaks below.

What do those funny hachure marks mean? Some features, such as the Grand Canyon, lakes, mines, or sinkholes actually are holes in the ground. The hachured contours indicate a depression. Don’t confuse it with a hilltop!

The difference between the highest elevation point and the lowest elevation point on a map Relief Units = meters What is the relief of this map? What is the contour interval of this map? 200 meters 100 meters

A map made of pictures of the Earth taken from a satellite orbiting the Earth Satellite Map View

Rules for Successful Contouring Golden Rule #1 Every point along a contour line represents the same elevation. This entire line represents 1200 feet above sea level

Rules for Successful Contouring Golden Rule #2 Contour lines NEVER split or divide! Can’t happen!

Rules for Successful Contouring Golden Rule #3 Contour lines cannot just stop. They must either form a closed loop, or run off the edge of your map. What’s the elevation here??? ? This is fine! ?

Rules for Successful Contouring Golden Rule #4 Contour lines NEVER, EVER cross What’s going on?? Is this area above or below 1200 feet? ?

Contour lines that cross a valley or stream are V-shaped –The V points towards the area of highest elevation Rules for Successful Contouring Golden Rule #5

Rules for Successful Contouring Golden Rule #6 Tops of mountains or hills are shown by closed circles

TOPO QUIZ Now its time to test your topography map reading skills. Good Luck!!

1.If you traveled from point A to point B, would you be going uphill or downhill? uphill downhill 2.What landform do you think this map depicts? a. ValleyValley b. MountainMountain c. PlainPlain X 825 A B

Correct!

Sorry Actually, you would be going uphill. Look at the elevations on the contour lines you will be crossing.

Sorry

3.In which direction does Maple Creek flow? a.NortheastNortheast b.SouthwestSouthwest c.Can’t tell from information givenCan’t tell from information given 4.What is the contour interval of this map? a.5050 b c Maple Creek

5. What is the approximate elevation at the top of this hill? a b c Which hike would be steeper, from A to B or from C to D?A to B C to D C D A B

7. What is the contour interval of this map? a. 20 feet20 feet b. -20 feet-20 feet c. 60 feet60 feet 8. What type of landform is depicted here? a. a mountaina mountain b. a depressiona depression c. a valleya valley

Exit The rocks found on river banks are smooth and circular in shape. Explain what natural phenomenon you is responsible for the circular shape of the rocks.

Topographic maps EQ: Why does the surface of the Earth change? Starter: 1/21/ Topographic maps 1/21/2016 Practice: Write observations here and Draw your picture here Connection: Worksheet Exit: The rocks found on river banks are smooth and circular in shape. Explain what natural phenomenon you think is responsible for the circular shape of the rocks. Application: Paste Notes Here What type of plate boundary is shown in the picture. What geologic event can occur here?