www.historyforkids.org visibleearth.nasa.gov  A hypothesis that the continents slowly move across Earth’s surface  Proposed by Alfred Wegener.

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Presentation transcript:

visibleearth.nasa.gov

 A hypothesis that the continents slowly move across Earth’s surface  Proposed by Alfred Wegener

The name of the single landmass that broke apart 200 million years ago and gave rise to today’s continents Pangea Interactive Map

Evidence Interactive Map

Observing: Which coastlines seem to match up like jig-saw puzzle? The continents of Africa and South America match up like jigsaw-puzzle pieces!!

Same plant and animal fossils found on the coastlines of different continents. What might the presence of marsupials in Australia and North America suggest? Marsupials migrated and then evolved differently when continents separated. l

 Tropical plant remains (coal deposits) found in Antarctica  Same rock patterns (from coal deposits) found in South America, India, Africa, Antarctica and Australia

Where plates collide, forming mountains.

 Where plates move apart, forming volcanoes and ocean rifts.

 Where plates slide past each other, causing earthquakes.

 Hot magma in the Earth moves toward the surface, cools, then sinks again.  Creates convection currents beneath the plates that cause the plates to move. What is a common novelty item that uses convection? Lava Lamps!

90% of world’s earthquakes 75% of world’s volcanoes

 In groups of 3, take a few minutes to discuss the following…. ◦ Use your knowledge of plate tectonics to describe the cause of the Earthquake that happened in Japan. ◦ Make predictions about other events we could expect to see in the future in this area.