TEST 2

A)  Read the text ,and answer the following questions:

1)extract a summary of the text  . 

2) explain the theory of plate tectonics

3)why the Tectonic plates are able to move

 B)   watch the video,them answer the questions:

1)who first proposed the idea of plate tectonics?

2)what is PANGAEA?

3)explain the tow type of layer ( compositional and mechanical)

4)explain the three type of plate tectonic boundaries, and what are the results of each type?