Lab write-up and tectonic plates review

Warm-up: 
1.________ __________ is the reason behind the movement of tectonic plates.
2.The definition of convection current is:
3.Scientists predict that earth’s plates move about:  a. 4cm/yr   b. 4km/yr c. 4 in/yr

Classwork:
lab write-up
discussion
check plate boundary chart

Homework: "Theory of plate tectonics" hand out. [DO ONLY ONE SIDE.