Continental Drift Continental Drift

Comments

Transcription

Continental Drift Continental Drift
Continental Drift
Continental Drift
Have you ever wondered how our continents have changed over time?
Have you ever heard anyone say that the Atlantic Ocean is getting bigger every
day? These events occur because of a theory called continental drift. In 1912, a
German scientist named Alfred Wegener (‘W’ pronounced as a ‘V’) proposed the
theory that all of our continents were once joined together in one single large
landmass called Pangaea. The theory suggests that the supercontinent Pangaea
broke apart and have slowly drifted to their current locations. Other scientists
at the time thought Wegener was crazy for his theory because nobody could
provide an explanation of HOW the continents would have moved.
Have you ever wondered how our continents have changed over time?
Have you ever heard anyone say that the Atlantic Ocean is getting bigger every
day? These events occur because of a theory called continental drift. In 1912, a
German scientist named Alfred Wegener (‘W’ pronounced as a ‘V’) proposed the
theory that all of our continents were once joined together in one single large
landmass called Pangaea. The theory suggests that the supercontinent Pangaea
broke apart and have slowly drifted to their current locations. Other scientists
at the time thought Wegener was crazy for his theory because nobody could
provide an explanation of HOW the continents would have moved.
Over the years, scientists have collected evidence that supports
continental drift. For example, scientists have discovered unlikely fossils of the
same species on different continents. For example, a warm weather species was
found in Antarctica where the odds of survival of that species are slim. This is
evidence that Antarctica was, at one time, closer to the equator where that
fossilized species could survive. Specific fossil species have also been found along
matching borders where continents would have been connected while they made
up Pangaea.
Over the years, scientists have collected evidence that supports
continental drift. For example, scientists have discovered unlikely fossils of the
same species on different continents. For example, a warm weather species was
found in Antarctica where the odds of survival of that species are slim. This is
evidence that Antarctica was, at one time, closer to the equator where that
fossilized species could survive. Specific fossil species have also been found along
matching borders where continents would have been connected while they made
up Pangaea.
The more obvious evidence is that it appears the continental borders
appear as if they would fit together like a puzzle. The theory of continental drift
suggests that North and South America were connected with Europe and Africa
and Antarctic was attached and closer to the equator. Measurements show that
North America moves away from Europe and Africa (the Atlantic Ocean getting
larger) by approximately 2.5cm per year. This evidence shows that continental
drift happens at an extremely slow pace. It appears that despite the criticism,
Alfred Wegener was correct all along. Now that scientists understand plate
tectonics and how the earth moves, they would be able to support Wegener’s
theory with HOW continental drift works.
The more obvious evidence is that it appears the continental borders
appear as if they would fit together like a puzzle. The theory of continental drift
suggests that North and South America were connected with Europe and Africa
and Antarctic was attached and closer to the equator. Measurements show that
North America moves away from Europe and Africa (the Atlantic Ocean getting
larger) by approximately 2.5cm per year. This evidence shows that continental
drift happens at an extremely slow pace. It appears that despite the criticism,
Alfred Wegener was correct all along. Now that scientists understand plate
tectonics and how the earth moves, they would be able to support Wegener’s
theory with HOW continental drift works.
©J.Smith,*2015*
4*
Continental Drift in Progress
EVIDENCE SUPPORTING CONTINENTAL DRIFT
Pangaea
Present Day
1
2
3
©J.Smith,*2015*
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
4
Explain the theory of continental drift and the importance of the evidence that supports this theory.
Instructions:
Create a flip book out of the 3 flip flaps. Starting with Pangaea, draw how the continents would look, then as continental drift
was in progress, then color in the present day world map. Next, fill out the ‘evidence’ foldable with four pieces of evidence
mentioned in the reading passage. Under each flap of the ‘evidence’ foldable, explain how that evidence supports continental
drift. Finally, show what you know by responding to the writing prompt.
5*

Similar documents