Problem 12
How many major tectonic plates exist? List them.
Problem 13
Describe the three types of tectonic plate boundaries.
Problem 14
Explain why tectonic plate boundaries are geologically active and the interior regions of plates are geologically stable.
Problem 15
Describe some differences between the lithosphere beneath a continent and that beneath oceanic crust.
Problem 16
Describe a reasonable model for a mechanism that causes movement of tectonic plates.
Problem 17
Why would a lithospheric plate floating on the asthenosphere suddenly begin to sink into the mantle to create a new subduction zone?
Problem 18
Describe the Mid-Oceanic Ridge.
Problem 19
Why are the oldest sea-floor rocks only about 200 million years old, whereas some continental rocks are almost 4 billion years old?
