What evidence did Wegener discover Its 1912 we

What evidence did Wegener discover?

It’s 1912, we barely had land line phones, cars and NO deep sea submarines or high tech ANYTHING

IN 1912… WEGENER made a lot of INFERENCES about what was happening to our planet Earth’s surface without lots of gadgets.

WEGENER had to travel SLOWLY all over the world, across oceans, to collect lots of data by simply recording his observations wherever he went.

He figured that PRESSURE from below KEEPS EARTH’s crust CRACKED with LIQUID ROCK flowing underneath.

And WEGENER called these cracked Earth pieces PLATES!

And this liquid magma allows our CONTINENTS to DRIFT all around the globe

But most folk didn’t believe him. They were skeptics.

So WEGENER travelled all over the Earth collecting rocks and fossils.

So WEGENER travelled all over the Earth collecting rocks and fossils.

So WEGENER travelled all over the Earth collecting rocks and fossils.

Wegener found the same rock layers with the same fossils in them on totally different continents.

Puzzling evidense…

Puzzling evidense… • We know that Pangaea was together as one big supercontinent 250 million years ago because of Wegener.

Puzzling evidense… • Across each continent above, color the same fossil shapes the same color.

Puzzling evidense… • Across each continent above, color the same fossil shapes the same color. Then find how these continents all fit together 250 mya.

Puzzling evidense… • PANGEAE PUZZLE…cut out and assemble 250 million year old supercontinent Pangea based on the fossil and geologic evidence above

See how the Earth plates have moved the last few HUNDRED MILLION YEARS!

See how the Earth plates have moved the last few HUNDRED MILLION YEARS!

Wegener’s evidence for his Theory of Continental Drift:

Wegener evidence of CONTINENTAL DRIFT! 1. Fossils of the same species were discovered on TWO different CONTINENTS.

Wegener evidence of CONTINENTAL DRIFT! 1. Fossils of the SAME SPECIES were discovered on TWO different CONTINENTS.

1. . Fossils of the same species were discovered on TWO different continents.

1. Similar fossils of the same species were discovered on 2 DIFFERENT continents. .

Paleontologists (dinoscientists) have connected fossil records to show the continents were once connected as one SUPER continent: _ _ _.

Paleontologists (dinoscientists) have been tracking the fossil records to show the continents were once connected as one SUPER continent: PANGAEA. D W N U 000 O O HR 00 G , A O N G 0 , 0 O S A? 5 L 2 AR O YEAG

2. Wegener found rock layers in same the ROCK LAYERS in the exact same layeredon positions on two layered positions two different continents. Appalachian rocks… Scottish highlands!

2. ROCK LAYERS in the exact same layered positions on two different continents. Brazil…. West Africa!

3. Wegener also found odd places for fossils…like tropical ferns in icy Greenland,

3. Wegener also found odd places for fossils…like tropical ferns in icy Greenland,

3. Wegener also found odd places for fossils…like tropical ferns in icy Greenland,

3. Wegener found odd places for fossils…like snail fossils on top of icy mountains,

3. Wegener found odd places for fossils… glaciers scratched rocks in South Africa.

3. Wegener found odd places for fossils… glaciers scratched rocks in South Africa, signs of GLOBAL CLIMATE CHANGE. .

But alas, poor Wegener

But alas, poor Wegener • Wegener couldn’t show ___ the plates move. ▫ WHO, WHAT, WHERE, WHEN, or HOW?

But alas, poor Wegener • Wegener couldn’t show ___ the plates move. ▫ WHO, WHAT, WHERE, WHEN, or HOW?

But alas, poor Wegener, no high tech tools for him…. • Wegener couldn’t show HOW the plates move.

But alas, poor Wegener, no high tech tools for him…. • Wegener couldn’t show HOW the plates move. • Back then, we had no GPS (global position satellites) nor did we know much about atomic radiation nor C _ _ V_ C _ _ _ N

But alas, poor Wegener, no high tech tools for him…. • Wegener COULD NOT show HOW plates move. • He could not show CONVECTION!

MAKE SURE YOU HAVE THIS!

HOT STUFF FROM THE CORE RISES TOWARDS THE SURFACE AS ATOMS & MOLECULES SPREAD OUT WITH EXTRA HEAT (DENSITY AS M/ V )… sigh…

TOWARDS THE SURFACE, ATOMS COOL AND GET CLOSER (DENSITY AS M/V ). NOW DENSE STUFF RESINKS ONLY TO REPEAT…

CONVECTION occurs in the _________. As hot, less dense rock floats to the top…cools… then sinks back down again…& again. LITHOSPHERE ASTHENOSPHERE REST OF THE HOT STUFF!

CONVECTION occurs in the ASTHENOSPHERE. As hot, less dense rock floats to the top…cools… then sinks back down again…& again. LITHOSPHERE ASTHENOSPHERE REST OF THE HOT STUFF!

Since Wegener, we got MORE evidence to support his Theory of Continental Drift today! magnetic volcanic rock, seismology exercise, and finally magnetic reversals, (compasses)

Paleontologists (dinoscientists) have continued tracking the fossil records to show the continents were once connected as PANGAEA.

Wegener’s EVIDENCE for his Theory of Continental Drift: 1. Fossils of the SAME SPECIES were discovered on TWO different CONTINENTS. 2. ROCK LAYERS in the exact same layered positions on two different continents. 3. odd places for fossils…

Wegener’s EVIDENCE for his Theory of Continental Drift: 1. Fossils of the SAME SPECIES were discovered on TWO different CONTINENTS. 2. ROCK LAYERS in the exact same layered positions on two different continents. 3. odd places for fossils…global climate change Wegener did NOT know….

Wegener’s EVIDENCE for his Theory of Continental Drift: 1. Fossils of the SAME SPECIES were discovered on TWO different CONTINENTS. 2. ROCK LAYERS in the exact same layered positions on two different continents. 3. odd places for fossils…global climate change Wegener did NOT know how convection worked or new….

MORE RECENT EVIDENCE supporting CONTINENTAL DRIFT: 1. MAGNETIC REVERSAL in our MIDOCEAN ridges http: //www. iflscience. com/physics/magne tic-pole-reversal-can-take-less-lifetime/ compass, orange paper, spreading magnetic land strips activity

PLATES that MOVE AWAY form NEW CRUST usually IN THE MID OCEAN RIDGES. • These submarines also showed us evidence of MAGNETIC REVERSALS!

Magnetic Reversal - The changing in direction of the Earth’s magnetic poles. - When the Earth’s poles do change direction, the rocks on the seafloor become magnetically charged in the opposite direction.

Compare Earth to a Magnet

Compare Earth to a Magnet

Compare Earth to a Magnet