Continental drift is the hypothesis that the Earth's continents have moved over geologic time relative to each other, thus appearing to have "drifted" across the ocean bed.
Wegener argued that there was once a super continent (which he named Pangea -meaning ''all land ) which split up over millions of year and gradually drifted over to their current place on earth at a rate of a few centimeter year.
Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. The plates act like a hard and rigid shell compared to Earth's mantle. This strong outer layer is called the lithosphere.
Continental drift is the hypothesis that the Earth's continents have moved over geologic time relative to each other, thus appearing to have "drifted" across the ocean bed.
Wegener argued that there was once a super continent (which he named Pangea -meaning ''all land ) which split up over millions of year and gradually drifted over to their current place on earth at a rate of a few centimeter year.
Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. The plates act like a hard and rigid shell compared to Earth's mantle. This strong outer layer is called the lithosphere.
This pdf covers theory of continental drift and plate tectonics.
Continental drift
Plate Tectonics
Mantle Convection
Convection currects
Types of Mantle convection
Drivers of the plate motion.
Bibliography_ Lutgens, Tarbuk and Tasa Publisher: Prentice Hall
8th Grade Integrated Science Chapter 14 Lesson 1 on the Continental Drift Hypothesis. This is a short introduction to Alfred Weger and the current evidence used to support his theory. There is a short explanation of the fossil and rock evidence found.
This pdf covers theory of continental drift and plate tectonics.
Continental drift
Plate Tectonics
Mantle Convection
Convection currects
Types of Mantle convection
Drivers of the plate motion.
Bibliography_ Lutgens, Tarbuk and Tasa Publisher: Prentice Hall
8th Grade Integrated Science Chapter 14 Lesson 1 on the Continental Drift Hypothesis. This is a short introduction to Alfred Weger and the current evidence used to support his theory. There is a short explanation of the fossil and rock evidence found.
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Alfred Wegener, Pangea, A+.ppt.pptxhshsh
1. Alfred Wegener, Pangea, And
The Evidence For Continental
Drift.
Tyler Young
Amesbury 4th
Sep. 21, 2015
2. Alfred Wegener
• Alfred Lothar Wegener (nov, 1, 1880 - 1930) was a German polar
researcher, geophysicist and meteorologist.
• He is most remembered as the original theorist of the theory of
continental drift by hypothesizing that the continents are slowly
drifting around the Earth.
• His theory was disproved due to his “non-popularity” and the
scientists that had disproved him were some of the greatest
geophysical minds of the century.
3.
4. Pangea
• Pangea is the theory that all the continents were once (millions of
years ago) all perfectly put together as one giant land mass and after
millions of more years they had separated and detached from each
other.
• Pangea cant exactly be “proved” but the theories strong point is that
all the continents seem to fit to each other like a puzzle piece.
• Other points to the theory were the fossils from millions of years old
animals, rocks, insects, etc. found on complete opposite sides of the
world and if it weren’t for Pangea these fossils would have to swim
thousands of miles across oceans and seas and that seems unlikely.
5.
6. Evidence of Continental Drift
• As stated before the theory of continental drift has strong points of
evidence one being the physical feature, how all of the continents, for
the most part, fit together like puzzle pieces for example, Africa and
South America.
• For example, the rock layers that form the Appalachian mountains of
the Eastern U.S. matched with those in Scotland. Rocks in Alaska
contain fossil palm tree leaves, though there have not been palm
trees at that area for a very long time so, he stated that the
continents must “drift” around the Earth, sometimes colliding with
each other.
7. Convection, Conduction, and Radiation
• During convection magma rises and spreads the sea floor. At the
boundary between the plates, the ocean floor sinks, but at the same
time is pushing against the continents. At the plates move, most of
the geological structures and events we are familiar with occur,
including earthquakes and volcanoes. Plate tectonics a major theory
explaining the way our planet operates and moves about