unit 3 lesson 2

Question 1

State the theory of plate tectonics

Answer 1

Earth’s surface is made of giant moving slabs

Question 2

describe the historical development of evidence that led to the theory of continental drift

Answer 2

rocks and fossils

shape of the continents

climate evidence

Question 3

describe three mechanisms that cause plate movement

Answer 3

1) mantle convection- hot currents rise cold currents fall

2) ridge push- move from mid ocean ridges as rock cools and becomes more dense

3) slab pull- pulls a plate pulled a long whendense edge sinks beneath Earth’s surface

Question 4

subduction

Answer 4

process where one tectonic plate is pulled beneath another