Extended Activity. Check with your teacher if you have time to do the actual sea floor map.
(1) In this activity you will be finding the depths of all the locations on your grid. You already have column C. Record those depths on the Grid Map Worksheet. Using the same technique you used on column C record the depth of each point on the other columns on the Grid Map Worksheet.
(2) Now you are to draw in the contour lines. You need to remember the following rules for contour lines.
a. no contour line ends on a map. It can run off the side.
b. no contour line may cross any other contour line.
c. the closer the lines are together the steeper the elevation change.
d. Once you have your line on your map you may elect to color the different elevations.
The following is sample of what one box had in it: