Materials
- Table 7.5.
- Fig. 7.19
- Scissors
- Colored pencils or crayons
- Construction paper
- Glue or gluestick
- World map (optional)

Procedure
A. Evaluate and interpret the available evidence.
- Carefully read each piece of evidence listed in Table 7.5.
- Discuss each piece of evidence with your group.
- Evaluate the quality of the evidence by ranking each statement on a scale of 1–5 in the “quality” column of Table 7.5:
- 1 = “low quality” evidence that does not support the idea of continental drift
- 5 = “high quality” evidence that is very supportive of the idea of continental drift.
- Explain the reasoning for your ranking in the “interpretation” column of Table 7.5.
B. Map the evidence.
- Use scissors to cut out all continent pieces from Fig. 7.19.
- Place the continent pieces in their modern day relative positions. You may lay these continent pieces over a modern world map if needed.
- Glacial striations are deep grooves gouged into rock formations by moving or spreading glaciers or ice sheets.
- Find regions where ancient glacial striations have been discovered, as indicated on Fig. 7.19 with the symbol “=”.
- Color these regions yellow.
- Fossils of the fern plant Glossopteris can be found within the distinct Gondwana rock sequence (Table 7.5; Fig. 7.20 C).
- Find regions where Glossopteris plant fossils have been discovered, as indicated on Fig. 7.19 with symbol G.
- Color these regions green.
- Fossils of the aquatic reptile Mesosaurus can be found within the distinct Gondwana rock sequence (Table 7.5; Fig. 7.20 A).
- Find regions where Mesosaurus fossils have been discovered, as indicated on Fig. 7.19 with symbol M.
- Color these regions blue.
- Fossils of the aquatic reptile Cynognathus can be found within the distinct Gondwana rock sequence (Table 7.5; Fig. 7.20 B).
- Find regions where Cynognathus fossils have been discovered, as indicated on Fig. 7.19 with symbol C.
- Color these regions orange.
- Fossils of the aquatic reptile Lystrosaurus can be found within the distinct Gondwana rock sequence (Table 7.5; Fig. 7.20 D).
- Find regions where Lystrosaurus fossils have been discovered, as indicated on Fig. 7.19 with symbol L.
- Color these regions brown.
- Present-day earthworm species within the family Megascolecidae have a limited geographic distribution (Table 7.5).
- Find regions where present-day megascolecid earthworms occur, as indicated on Fig. 7.19 with symbol E.
- Color these regions red.


- Try to fit all the continent pieces together so that the continental edges match. Try to also make the colored evidence regions match.
- Compare your arrangement of matched continents to that of your classmates.
- Discuss the role of each piece of evidence in the arrangement of your supercontinent.
- After coming to an agreement on the arrangement of your single supercontinent, glue the pieces to a sheet of construction paper.