The document summarizes the theory of continental drift, which was proposed by Alfred Wegener in 1912. It explains that the continents move across the ocean bed due to shifting tectonic plates at a rate of 1 to 10 cm per year. This movement of plates causes volcanic and seismic activity at plate boundaries. The document also discusses Pangaea, a supercontinent that existed 300 million years ago before breaking apart over 100 million years.

1. CONTINENTAL DRIFT
CLASS: L
BY: YALIZET A. S.

2. What Is The theory of continental drif?
 Continental drift is the movement of the Earth's, thus
appearing to "drift" across the ocean bed…
 The plates are moving at a speed that has been estimated at
1 to 10 cm per year. Most of the Earth's seismic activity
(volcanoes and earthquakes) occurs at the plate boundaries
as they interact.
 The top layers of the plates are called the crust.

3. Who thought of this theory and when?
Continental drift was a theory that
explained how continents shift position on
Earth's surface. Set forth in 1912 by
Alfred Wegener, a geophysicist and
meteorologist.
En.wikipedia.org

4. What is pangaea?
 Pangea was a supercontinent that existed
during the late Paleozoic and early Mesozoic
eras. It formed approximately 300 million years
ago and then began to break apart after about
100 million years.
www.geolog
yclass.org
www.teluguaspirant.com

5. What are the 3 main pieces of evidence for this theory?
 Fossil the evidence: * Puzzle the evidence:
 Rock the evidence:
Earthanvir
Onmental.
Blogspot.com
www.rhnet.org
Earthscience.wordpress.com