1. B43b
CONTINENTAL DRIFT
LAND ON THE MOVE

2. CONTINENTAL DRIFT
Idea that the land (continents) has moved to its current location and is still moving
Proposed by Alfred Wegner.
Supported by fossil and rock evidence

3. PANGAEA huge “super-continent” all land masses joined together
(B1, Figure 5)

4. PUZZLE-LIKE FIT (B1, Figure 6)
Edges of continents fit together like a puzzle.
THEREFORE: continents must have been together
(B1, Figure 6)

5. REPTILE FOSSILS (B2, Figure 7) Reptiles could not swim
fossils found on now distant continents
THEREFORE: continents must have been together
(B2, Figure 7)

6. FERN FOSSILS (B2, Figure 7)
1 - spores (like seeds) could not float across an ocean
fossils found on now distant continents
THEREFORE: continents must have been together
(B2, Figure 7)

7. (B3, Figure 7) 2 - grow only in warm, moist climates
fossils found on Antarctica
THEREFORE: Antarctica must have moved
(B3, Figure 7)

8. ROCK CLUES (B3, Figure 8) same mountain range
found on now distant continents
THEREFORE: continents must have been together
(B3, Figure 8)

9. ASSIGNMENT Make a table with two columns.
Label the columns: “continents have moved” and “continents were together.”
Add the evidence that fits in each column.