Plate Tectonics Flashcards
1
Q
Divergent Boundaries?
A
Plates separate
Lots of volcanoes and earthquakes
2
Q
Convergent plates?
A
Plates push together
Often trenches
3
Q
Whole mantle convection
A
Uses the whole mantle for convection heating
4
Q
Stratified convection?
A
Two convection cycles separated by a horizontal line
5
Q
Transformation faults?
A
Spreading centers offset(ocean)
Plates slide along each other
6
Q
Magnetic mapping
A
Runs in positive negative cycles
7
Q
What causes earthquakes
A
faults
8
Q
How many plates does earth have?
A
13 major and a number of smaller ones
9
Q
What causes earths magnetic field?
A
Convection in outer core
10
Q
Changes in convection cause?
A
Polarity reversals of earths magnetic field
