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CONTINENTAL DRIFT

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.

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CONTINENTAL DRIFT

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

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

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

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

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

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