Restless Earth Flashcards
1
Q
Give five characteristics of oceanic crust
A
Very dense
5-10km thick
Can sink into mantle
Easily destroyed
Young
2
Q
Describe continental crust
A
Less dense
30-70km thick
Hard to destroy
Old
3
Q
How long ago was Pangea
A
250million
4
Q
What makes plates move
A
Convection currents within the mantle moves upward from the core and cause movement
5
Q
Name a landform caused by destructive boundaries
A
Mariana Trench
6
Q
What is an intrusive igneous rock
A
Granite
