1. Plate Tectonics Ocean Floor
Unit 7 Bell work
Plate Tectonics
Ocean Floor

2. Bell work: 1/25 What percent % of Earth is covered with oceans?
2. Name the 5 oceans on earth?
The ____________ Ocean, ____________ Ocean, ___________ Ocean,
___________ Ocean, and the ____________ Ocean
3. Oceanic Crust is made of one type of rock:
igneous, sedimentary, metamorphic
Name of the rock that makes-up all the ocean floor?

3. Bell work: 1/26
List (3) evidence that the continents were once together and have drifted apart:

4. Bell work: 1/29
Below are maps showing the location of volcanoes and earthquakes in east Africa.
According to the Continental Drift Theory, what is happening to the continent of Africa?

5. Bell work: 1/30
An echo sounder measured 2.1 seconds for a sound wave to reflect off the ocean floor and return to the boat.
The speed of sound in sea water is approximately 1500 m/s What is the depth at that location?
Depth= ½ (speed of sound x time)
2) What is the name of the ocean feature labeled C in the diagram?

6. Bell work: 1/31 Which ocean is spreading at a faster rate?
Atlantic or Pacific?
How many cm/year?
2. Where in the diagram is the
Hottest rock?
Oldest rock?

7. Bell work: 2/1
1. Sketch a graph that shows the TEMPERATURE of the rock as you move from location A– location C.
A B C
2. Sketch a graph that shows the AGE of the rock as you move from location A – C.
A B C

8. Name the ocean features in the diagram below:
Bell work: 2/2
Name the ocean features in the diagram below:
________ E C D H A F B
________

9. Bell work: 2/5 Plates move in 3 directions ways relative to each other
The plate edges (boundaries) are being
1._______toward,
2._______ away
3. _______past each other
pushed
convergent
pulled
divergent
slide
transform

10. Where id the RING of FIRE? Why is it called that?
Bell work: 2/6
Where id the RING of FIRE?
Why is it called that?
Johnny Cash

11. Most of the Earths VOLCANOES and EARTHQUAKES are around the Pacific Ocean rim

12. Bell work: 2/6
MATCH the following features with the type of boundary they form at:
A. convergent B. divergent C. transform
___1. Himalayan Mts. ___2. Andes and Cascade Mountains ___3. San Andreas Fault, California ___4. Red Sea in Africa ___5. Indonesian, Aleutian & Japan Islands ___6. Iceland ___7. Marianna trench

13. Bell work 2/8 1. If the Atlantic Ocean is spreading and
growing, is the Pacific Ocean getting smaller?
2. What type of plate boundary is on the U.S. west coast? U.S. east coast?

14. 2. Answer East coast of U.S. No where near a plate boundary!
West Coast:
Pacific plate subducts under North American plate – convergent boundary.
East coast of U.S. No where near a plate boundary!
California: transform boundary