CLASS COPY
CLASS COPY
Topographic Maps Lab Activity
Learning Target: I will be able to create and interpret a 2 dimensional topographic map of a 3 dimensional
model representing a land and erosional feature on Earth’s crust.
TEK 8.9C: Interpret topographic maps and satellite views to identify land and erosional features and
predict how these features may be reshaped by weathering.
Introduction: This model will demonstrate how topographic maps represent three-dimensional land forms in a
two-dimensional format. The foam layers in this model represent horizontal cross sections of a mountain. The
layers or lines on a topographic map represent a rise or fall in land based on elevation.
Materials:
BOSS, 6 foam contour layers, 1 wooden dowel, pencil, construction paper, Topographic
Maps Notes.
Procedures: Building the Model
1. Assemble the landform by inserting the wooden dowel through the hole in each foam layer. Place the layers
on the dowel from largest to smallest so that the “v” shaped indentions and numbers are in alignment. Make
sure the numbers on each layer are facing up.
2. Look at your assembled model and answer the following questions in your BOSS using complete sentences.
1. What kind of land form could the model represent?
2. Support your answer above. Why do you think the model represents the land form you chose?
3. What does each layer of the model represent?
Mapping the Mountain
Procedures:
1. Remove layer 1 (bottom layer) from the model.
2. Center it on your piece of construction paper and trace around the outside with a PENCIL. Before lifting the
foam layer off the paper, place a mark on the paper inside the dowel hole. You will you this mark to align the
next layer correctly.
3. Remove layer 2 and line up the dowel hole with the mark on the paper. Next, line up the “v” shaped
indentions and trace around the outside of this layer.
4. Trace the remaining layers using the same method.
5. Reassemble the model and put it aside.
6. Label the lines on your map with the elevation given on each layer of the model. Put an X on your map
where the dowel hole was to show the highest part of the mountain.
7. Title your Map and identify and label the contour interval.
Now you have a two-dimensional drawing that represents a three-dimensional mountain.
Answer the following questions in your BOSS using complete sentences.
1. What does each line on your map represent?
2. What is the lowest elevation on your map?
3. What is the highest elevation on your map?
4. What is the contour interval on your map?
5. What do you think it means when the lines are close together?
6. What do you think it means when the lines are far apart?
7. Locate the “v” shaped indention on your map. This indicates weathering and erosion of the rock.
What erosional feature would cause this erosion down the side of your mountain?
Analysis: Neatly write a paragraph including the following information about your map on a separate sheet of
paper. Make sure you use complete sentences, correct spelling, punctuation and grammar!
1. Explain what a topographic map is.
2. Explain what contour lines are on a topographic map.
3. Explain what the contour interval is on a topographic map.
4. Describe how you know where slope on a topographic map is the steepest.
5. Define weathering and erosion.
6. Describe all the possible causes of weathering and erosion that may affect your mountain.
7. Explain what an erosional feature is and how you can identify one on a topographic map.
8. Predict and explain how your mountain may be reshaped by weathering and erosion over time.