Doughy Topos By Christine Sacco Warwood Middle School 1.Have each group make 4 different sizes of pancakes out of different colored dough. 2.Trace the 4 pancakes on a sheet of white paper. 3.Have students stack the four different size pancakes on top of each other, largest on the bottom. Have one edge of dough line up. 4.Discuss elevation. Discuss the way water will flow. Discuss slope (steepness, gentle erosion from water over a period of years). 5.Pour water over the dough so students can see the path of water. 6.Have students use a plastic knife and cut out a pie wedge. 7.Discuss stream flow (V’s) 8.Take the traced shape and cut them out. 9.Glue shapes on top of each other, largest on the bottom. 10.Label contour lines starting with 0 m. 11.Place a folded piece of paper on the contour map and mark the contours. 12.Take the marked paper and construct a profile on grid paper provided. 13.After profile is made, make a cross section of the dough model and compare files. 1.Have each group make 4 different sizes of pancakes out of different colored dough. 2.Trace the 4 pancakes on a sheet of white paper. 3.Have students stack the four different size pancakes on top of each other, largest on the bottom. Have one edge of dough line up. 4.Discuss elevation. Discuss the way water will flow. Discuss slope (steepness, gentle erosion from water over a period of years). 5.Pour water over the dough so students can see the path of water. 6.Have students use a plastic knife and cut out a pie wedge. 7.Discuss stream flow (V’s) 8.Take the traced shape and cut them out. 9.Glue shapes on top of each other, largest on the bottom. 10.Label contour lines starting with 0 m. 11.Place a folded piece of paper on the contour map and mark the contours. 12.Take the marked paper and construct a profile on grid paper provided. 13.After profile is made, make a cross section of the dough model and compare files. 60 minutes None listed Understand the basic concept of elevation. Understand that streams may form upstream V’s. Construct a contour map. Construct a topographic profile. Compare and construct a flat contour map to a 3-D model. Understand the basic concept of elevation. Understand that streams may form upstream V’s. Construct a contour map. Construct a topographic profile. Compare and construct a flat contour map to a 3-D model. For Each Group: 4 different colors of dough Paper and pencil Plastic knife Glue Scissors For Each Group: 4 different colors of dough Paper and pencil Plastic knife Glue Scissors Student profile is realistic. Student can find stream carved “V’s” on a topographic map and use them to explain the direction of water flow. Given a clay model showing dipping layers of rock, the students can extrapolate their findings to explain why some “V’s” point downstream. Student profile is realistic. Student can find stream carved “V’s” on a topographic map and use them to explain the direction of water flow. Given a clay model showing dipping layers of rock, the students can extrapolate their findings to explain why some “V’s” point downstream. None listed Objectives Materials and Equipment Materials and Equipment Time Procedures Assessment Further Challenges Further Challenges Overview Teaching Suggestions Safety Note Topo Dough 1 cup flour ½ cup salt 1 cup water 3 tablespoons oil 2 teaspoons cream of tartar Food coloring Mix together and cook over medium to low heat. Knead 1-2 minutes.