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Name: __________________________
Notes: Plate Tectonics
1. The Theory of __________________ explains why the ___________________
appear to drift with time.
2. _____________________ first proposed the idea of continental drift in the early
1900’s.
3. Describe the evidence for continental drift below:
4. Lithospheric plates consist of
_____________ or ______________
crust “floating” on the
______________________________
5. The force that causes the lithospheric plates to move is : ___________________
located in the _________________.
6. There are three types of plate boundaries;
a) Divergent, which means____________________________________
b) ________, which means____________________________________
c) ________, which means____________________________________
7. The Mid-Atlantic Ridge is a _______________________plate boundary, and it is
______________________ at a rate of _________ cm per year. This is called
“Sea Floor __________________________”
8. Magnetic anomalies are symmetrical patterns of magnetic polarities on either side
of a mid-ocean spreading ridge. They show that the rocks on the sea floor are (
older / younger ) the closer you get to the mid ocean ridge.
9. The rocks on the sea floor are ( older / younger ) the farther you get from the
mid ocean ridge.
10. Below is an example of one side of the mid ocean ridge spreading center, showing
the magnetic polarity of the rock units. Draw in the other side and label where the
youngest rocks and oldest rocks are on each side of the ridge.
11. The Theory of Plate Tectonics states that
a) ______________________________________________________
b) ______________________________________________________
c) ______________________________________________________
12. A ________________________ plate boundary occurs when two plates slide
along side each other. An example is: _________________________________
13. A Convergent Plate Boundary occurs when two plates ____________________.
The three types of convergent boundaries are:
1) _________________________________
example: ________________
2) _________________________________
example: ________________
3) _________________________________
example: ________________
Identify the type and label the features found at the plate boundaries shown below:
Draw and label the missing type of convergent plate boundary:
Examples: _________________________
__________________________________
Examples: ___________________________
____________________________________
The Ring of Fire is ________________________________________________________
A Hot Spot is_____________________________________________________________
________________________________________________________________________
Where do most earthquakes and volcanoes occur?
________________________________________________________________________
________________________________________________________________________
According to the ESRT on p _____________ there are __________ types of plate
boundaries.
Draw and label the symbols for each type of plate boundary shown on this page of the
ESRT: