Transcript Do Now: Earthquake review

Do Now: Earthquake review
1.
What is the difference between the epicenter and the focus?
Focus is the point of origin underground and epicenter is the point on the surface
directly above the focus.
2.
List, describe and DRAW the three main types of stresses.
Compression
Shearing
Tension
3.
What is a fault?
Break in the earth’s surface where movement occurs
4.
5.
Which earthquake scale is used to measure the amount of damage done by an
earthquake? Mercalli Scale
Which earthquake scale is based of the biggest seismic wave of an earthquake?
Richter
6.
Which type of seismic wave is the fastest?
Primary (P) waves
1.
Do Now: Earthquake Review
Where and when was the largest earthquake in US history?
Alaska, 1964
2.
Where and when was the largest earthquake in the world?
Chile, 1960
3.
4.
5.
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8.
What was the largest cause of deaths from the 2004 earthquake in the Indian
Ocean?
tsunami
Although the San Andreas Fault is also plate boundary, the stresses applied are
Strike-slip
from shearing making it also a __________________________
fault.
What is an upward fold in rock layers?
anticline
What type of fault is the result of one rock layer sliding over another at a low
angle?
Thrust fault
surface
Rayleigh waves are an example of _______________
waves.
Which type of stress pulls and twists the rocks layer is two opposite direction?
Shearing
1.
2.
3.
4.
Do Now: Earthquake Review
What is the cause of most earthquakes on earth?
Tectonic movement
During the quake in San Francisco in 1906, the major cause of damage was a
fire
_______________.
Footwall
Layer of rock wider at the base is called the ______________?
Name the fault below as well as the STRESS (red boxes) applied to each:
Compression
Tension
Normal
Reverse
Shearing
Compression
Thrust
5.
Strike-slip
Compare and contrast the recent earthquakes in Haiti and Chile. Be specific.
Haiti- only 7.0, destruction cause by poor structures, over crowded and poor
community for rescue, as well as occurred in a major city. Chile 8.8, has had
earthquake in past and more prepared. Also occurred in farm and smaller towns
Do Now: Quest Review
1.
What is Isostasy?
The balance in the earth's crust such that the forces
tending to elevate landmasses balance the forces
tending to depress landmasses.
2. Why is it important and what does it
prevent?
A
E
B
It keeps the earth’s crust floating even though
the crust’s density is constantly changing
(erosion, ice ages…)
C
3. What is a cross-cutting relationship?
The principle that the igneous intrusive
(solidified magma) is younger than the rock it
cuts across.
4. In the image, which layer is younger; A,
B, C,D, E? WHY?
E- is it cross-cutting through all other layers
5. What type of fault is being displayed?
HOW do you know?
Normal- FW is going up relative to HW
6. What is the stress acting on this fault?
Tension
D