Aim How have the continents changed over time
- Slides: 34
Aim: How have the continents changed over time? Topic: Dynamic Earth Main Idea: Plate Tectonics & Continental Drift
1) What is plate tectonics? l Plate tectonics is the study of how crustal plates move and interact.
2) What evidence is there for past crustal movement? FOLDING FAULTING TILTING
What can you tell about the history of crustal movement in the area of the Grand Canyon?
Let’s Review!! l. Collaborate with the person next to you to agree on an answer for these 3 questions.
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Think About It: If Pangaea reforms while humans are still present on Earth how would it affect civilization (economy, political leadership, travel, foreign relations, etc…)?
Who was Alfred L. Wegener? l He proposed that the earth was a single supercontinent (Pangaea) that separated over time.
What evidence did he have for his theory? N. and S. America fit together with Africa and Europe l The structure of the rocks matched perfectly with the coast of Africa and Europe l Tropical fossils were found in cold climates along the coast l Evidence of glaciation in S. America, S. Africa, India & S. Australia l
What was wrong with Wegener’s theory? Not all pieces fit perfectly l At the time it was thought that the earth did not have layers l Wegener didn’t know what made them move l
How will the earth change in the future?
(Appalachian)
Summary Find the appropriate page in your reference tables and answer the following questions 1) In which direction has North America Northwest moved? _________ 2) When did the Atlantic Ocean begin to Period (about 200 mya) form? Jurassic ___________
What do you notice in each of these three pictures?
What happened in this one?
What is a fault? l. A fault is a crack that runs through strata and displaces them.
What are three types of faults? The three faults are: Normal (Tension) Reverse (Compression) Strike-slip (Shear) l
What is the movement associated with normal and reverse faults? Normal: the footwall moves up (FUN) l Reverse: the footwall moves down (FDR) l
What is the movement associated with a transform fault? l The plates slide past each other. If they get stuck pressure is built up, but once the rocks snap it creates an earthquake.
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- How have computers changed over time
- Continents change position over time
- Aral sea changed over time
- Examples of real self
- Fatherclient
- What shape has 8 faces and 12 vertices
- Aim time management
- What is elapsed time
- Over the mountain over the plains
- Siach reciting the word over and over
- Handing over and taking over the watch
- Population distribution
- 7 continents in order
- Roman empire continents
- The seven continents
- Biggest continet
- How many continents
- Chapter 24 the land where continents collided
- Continents all together
- How many continents are there
- Similar fossils found on different continents
- Plate tectonic theory evidence
- Geographical names with and without the
- Outline map of continents and oceans
- Continent vocabulary
- Name 7 continents and 5 oceans
- Similar fossils found on different continents
- Label the world's 5 oceans
- Seven continents facts
- What are the 7 continents and 5 oceans
- Continents and oceans map
- Greek civilization introduction
- Chapter 7 section 2 restless continents answer key
- What continents were involved in the columbian exchange