Unit B Exploring the Ocean Floor
1.
Describe the shape of the most prominent features visible on the ocean floor?
a.
Ocean ridges/ Hills
b.
Trenches
c.
Criss- cross pattern of lines on the ocean floor
2.
What do the features represent?
a.
Under water mountains and valleys
3.
How many fault areas are visible on the screen?
a.
4
4.
Which fault areas appear to have symmetric magnetic stripping?
a.
Fault 1 & fault 3 pink red color represents normal magnetic pole
5.
What kind of fault must be present in these areas to account for symmetric magnetic
stripping?
a.
Divergent fault when two tectonic plates move away from each other
6.
What kind of fault line’s fault 2 & fault 4 represent? Explain
a.
Transform fault a plate boundary along which the relative motion between the
two plates is parallel to the strike of the fault and is geometrically the arc of a
small circle about the pole of rotation between two plates.
7.
What is the name of this mountain range?
a.
Cascades
8.
This mountain range is made of a chain of volcanoes that stretch along the western
coast and into Canada. Based on the information what kind of fault would you then
predict fault 5 to be? Explain
a.
Convergent fault a collision where two continental plates meet head on 80%
of earthquakes occur where plates are pushed together. It represent subduction
zone which creates the chain of volcanoes known as the cascades mountains.
