B43b CONTINENTAL DRIFT LAND ON THE MOVE.

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B43b CONTINENTAL DRIFT LAND ON THE MOVE

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

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

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

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

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)

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

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

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.