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B43b CONTINENTAL DRIFT LAND ON THE MOVE
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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
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PANGAEA huge “super-continent” all land masses joined together
(B1, Figure 5)
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PUZZLE-LIKE FIT (B1, Figure 6)
Edges of continents fit together like a puzzle. THEREFORE: continents must have been together (B1, Figure 6)
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REPTILE FOSSILS (B2, Figure 7) Reptiles could not swim
fossils found on now distant continents THEREFORE: continents must have been together (B2, Figure 7)
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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)
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(B3, Figure 7) 2 - grow only in warm, moist climates
fossils found on Antarctica THEREFORE: Antarctica must have moved (B3, Figure 7)
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ROCK CLUES (B3, Figure 8) same mountain range
found on now distant continents THEREFORE: continents must have been together (B3, Figure 8)
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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.
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