The document discusses the theory of continental drift, which was discovered by Alfred Wagner and proposes that the Earth's continents were once joined together in a supercontinent called Pangaea. The theory is supported by three main clues: geological evidence of matching rock layers across continents, evidence of changing climates in the distant past, and the discovery of the same fossils in different continents.

1. By: Elshaima Omran

2. The theory of continental drift was
discovered by Alfred Wagner.
The theory says that all continents
were once one supercontinent.
This one continent called Pangaea

3. When Pangaea braked
up a parts slowly and it
created the 7 continents
today.

4. During his research he found 3 main clues
that prove his theory that millions of years
ago the world continents were one
supercontinent
1. Geologic- layers of rocks all over
continents
2. Climate: changing climates during long
time ago.
3. Fossil: same fossils found in different
continents.