plate tect

Front

2 forces responsible for plate movements

Back

convection currents & slab-pull force

Front

what plate movement does slab pull force result in?

Back

convergence plate

Front

what plate movement does convection current result in?

Back

divergence plates

Front

what plate movement is seafloor spreading? what does it result in?

Back

divergence plates

new oceanic crust formed

Front

magnetic stripping is?

Back

it is the zebra-like pattern where there are strips of normal polarity rocks alternating alongside strips of reversed polarity rocks on seafloor (symmetrical on both sides of mid-oceanic ridge)

Front

types of plate movements

Back

convergence: O-O, C-C, O-C

divergence: O-O, C-C

transform

Front

what forms at divergent plates?

Back

O-O: mid-oceanic ridges, volcanoes, rift valleys, earthquakes

C-C: volcanoes, rift valleys, earthquakes

Front

what forms at convergence plate?

Back

O-O: volcanoes, oceanic trench, earthquakes

C-C: fold mountains, earthquakes

O-C: fold mountains, oceanic trench, volcanoes, earthquakes

Front

what happens at transform plates

Back

plates slide pas eo, no crust formed or destroyed

results in faults, earthquakes

Front

earthquakes occur when?

Back

1. 1. rock masses on either side of a fault are pushed by tectonic forces

2. 2.friction causes them to get locked, and stress builds up

3. 3. when stress exceeds strength of fault (or rock), the rocks snap or suddenly move to a new position

4. 4. this sudden movement causes seismic waves to be released, resulting in ground shaking