Investigation 2: Rocks and Landforms in Your Region

Key Question? What kind of rocks do you think are located in NJ? Iselin? Think about where you live in NJ and the 3 major categories of rock….

Define Important terms Use quizlet to copy terms into notebook. Locate topographic map on quizlet Define terms in your notebook

Golden Rules of Contour Lines. Contour lines never cross. All lines on a contour line represent one elevation. The spacing of contour lines depends on slope characteristics. Contour lines that are close together show a steep slope. Contour lines that are far apart show a gentle slope.

Golden Rules Continued… Contour lines that cross a valley or a stream are V shaped. The V points toward the area of the highest elevation. If a stream or river flows through the valley, the V points upstream. The tops of the hills, mountains, and depressions are shown by closed circles. Depressions are marked with short, straight lines inside the circle that point down slope to the depression.

Investigation Part A: Look at the following map on page 8 of the textbook and answer the following questions. What do you think the contour lines (curve lines) on the map connect? How can you tell by the contour lines whether a slope is steep or gentle? What do each of the following colors on the map represent: blue, green, black? How can you determine the real life distance between 2 locations on the map? What on the map indicates what section of the United States this map represents?

How to Find the Contour Interval… Locate two index contour lines contour lines on the map that are labeled with a specific elevation. Calculate the difference between the two elevation levels that they represent. To calculate the difference, subtract the number representing the line with the lesser elevation from the number representing the line with the higher elevation. Count the number of spaces between the contour lines. Divide the difference between the 2 elevation levels and the number of spaces between the 2 elevations. For example: 100ft/5 spaces equals a contour interval of 20 ft.

Example of Contour Interval Using the map from slide 9… Locate 2 index contour lines that are bold and have the elevations on them. I located 2200ft and 2000ft. Subtract them 2200-2000 = 200ft Count the number of spaces between them =5 spaces Divide: 200ft/5spaces = 40 ft. contour interval.

Contour Lines Video

Investigation Part B: Maps: A Visualization Tool Look at the topographic map. Use what you learned in Part A to interpret the map. Answer the questions on the back of the map sheet. Located on School wire: Visualization Tool

Investigation Part C: Geological Map of NJ Locate the Geologic Time Scale Fill in the Blanks on school wire. Look at the map of NJ. Each color represents a different rock type. Use the map to answer the following questions. What type of rocks will you find in Middlesex county? Why is South Jersey covered in Yellow? Was there once a volcano in NJ? Explain. Explain what you think NJ looked like millions of years ago?

Label parts of a Topographic Map Part D: Using the maps provided complete the following: a. Circle/highlight/label part of any contour line. b. Circle/highlight/label a index contour line. c. Find and label an airport. d. Find and label a road. e. Find and label the county line. Find and label a trail. Find the highest and lowest elevation. Find and label a steep and gentle elevation. Find and label a neighborhood. Find and label a railroad. Using the topographical Map Rule Chart find and label one additional feature on the map.