Pangaea and Theories Flashcards
1
Q
What is Pangaea?
A
Pangaea was the supercontinent that was formed when the continents were joined together
2
Q
What is the continental drift theory?
A
Alfred Wegener proposed that all the continents were connected to each other.
3
Q
What are some evidence that support Alfred Wegener’s theory?
A
- continents appear to fit like a puzzle
- fossilised plants and animals in different areas
- glacier scratchings
- Andes Mountain Range
- Tillite
4
Q
What was Harry H. Hess’ theory?
A
He theorised that if the crust is expanding in one place, it must have been shrinking elsewhere.
New crust formed at the mid-Atlantic ridges and oceanic trenches along the rim of the Pacific Ocean.
5
Q
What is the theory of plate tectonics?
A
The theory states that the Earth’s crust is broken into a series of plates which are constantly on the move.
