Lesson 1 "The Continental Drift Hypothesis"
The German scientist who created the continental drift hypothesis.
Alfred Wegener
Scientists discovered underwater mountain ranges, called...
Mid-Ocean Ridges
This theory states that Earth's surface is made of rigid slabs of rocks, or plates, that move with respect to each other.
Plate Tectonics
Alfred Wegener's theory that all of the continents were once part of a supercontinent.
Pangaea
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643
Which time period did Alfred Wegener conduct his initial research? (1880-1900, 1900-1920, 1940-1960)
1900-1920s
Near the mid-ocean ridges.
This plate boundary forms where two plates separate.
Divergent Plate Boundary
Suggested that continents are in constant motion on the surface of the Earth.
Continental Drift
Which company had the best selling vehicle in 2020?
(Ford, Toyota, or Jeep)
Ford
Earth's surface is on the move...is North America moving farther from Europe or closer to it?
NA is moving farther away from Europe every year.
The continued development of this device increased our knowledge of the seafloor and plate tectonics.
Echo Sounder
This plate boundary forms where two plates collide.
Convergent Plate Boundary
The process by which the denser plate sinks below the more buoyant plate.
Subduction
(REVIEW QUIZLET TERM): The transfer of thermal energy from one material to another by electromagnetic waves.
Radiation
What was the main objection to Wegener's theory?
He could not explain which forces caused continental drift.
How often do magnetic reversals occur?
Every few hundred thousand to every few million years.
What are the three forces that cause plate motion?
Basal Drag, Ridge Push, and Slab Pull.
A state in which magnetized objects would reverse direction and orient themselves to point south.
Reversed Polarity
How do you say "hello" to greet someone in French?
Bonjour!
List three pieces of evidence that Wegener used for his hypothesis.
- Climate Clues
- Fossil Clues
- Rock Clues
Which device was used for measuring and recording the magnetic signature of rocks/minerals.
Magnetometer
After years of studying, Scientists finally realized that continents move because the asthenosphere moves underneath the __________.
Lithosphere.
The circulation of material caused by differences in temperature and density.
Convection
In what decade of the 1900s was Taco Bell founded?