Daily Review #1

Warm-UpWhat are the 4 pieces of evidence that support the theory of Continental Drift?

Times Up!

Plate Tectonics

Plate TectonicsPlatesDivisions of lithosphereMoving on asthenosphereWegener Continental Drift TheoryEarly 1900sOnce single landmass - Pangaea

Broke up Laurasia, GondwanaDrifted to present location

Over the past 300 million years the continents have spread apart from each other.

Continental Drift EvidenceFor WegenerFitting together of continentsSimilar things on distant continentsFossilsRocksSea-Floor Spreading

Evidence for continental driftMid-ocean ridgesTectonic plates moving separatingNew magma risesForm new oceanic crustOlder crust pushed awayMagnetic ReversalsEvidence for continental driftMolten rockMagnetic mineralsAlign with magnetic fieldMagnetic field reverses177 times in 85 million yearsLast 600,000 years agoRecorded in rockSimilar pattern to age of rocks

Causes for Plate TectonicsConvectionAsthenosphereHeated rock Expands and risesCoolsMore dense

Inquiry ActivityFollow the directions on the worksheet to complete the activity.

When you are ready for shaving cream raise your hand and I will get you some.

https://www.youtube.com/watch?v=loFxYSHxTf0 Plate TectonicsMovementcm/yrMeasured by GPSInteract at boundaries 3 typesCollideSeparateSlide pastEarthquakes can occur at all

Plates are moving at varying rates, average of cm/yearWe can now measure this measure using GPS from several locations throughout the worldBoundaries: collide = convergent, separate = divergent, slide past = transform; find examples on map

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What will Denver be like?Earths History to 100 million years from nowNotice what Colorado/North America look like at the end of that videoShort Constructed ResponseUsing the information you have learned about continental drift, make a prediction about what Earths continents will look like in 100 million years. Make sure to support your claim with at least three pieces of evidence and provide commentary for each.