Earth Questions


QWhich four statements are true regarding the San Andreas Fault?

Which four statements are true regarding the San Andreas fault?
A. The San Andreas Fault is in California.
B. Some segments of the fault has a slow and gradual movement resulting in little noticeable seismic activity.
C. Stick-slip motion along the fault produces the largest earthquakes.
D. Movement along the fault is occurring at a speed of approximately 1 or 2 inches per day.

E. Seismic activity around Parkfield has been very regular since the mid 1800s.

Which two statements below regarding the magnitude of the moment are true?
Magnitude A. Time is the most accurate way to measure small earthquakes.
B. Moment magnitude is never as accurate as the Richter scale.
C. magnitude time can be verified by two independent methods.

D. Moment magnitude can be calculated using very long seismic waves.

E. The greatest moment magnitude ever identified was a 8.5.

Which three statements are true about Earth's interior?
A. The Earth's core is rich in iron.
B. The outer core is warmer than the inner core.

C. The mantle constitutes the bulk of the earth.
D. Lower mantle rocks are very hot and are able to flow very gradual.
E. The asthenosphere is a very soft layer in the core.


Which three statements are true regarding earthquakes?
Most earthquakes occur along A. faults.
B. Earthquakes are vibrations of Earth produced by the slow release of energy.

C. Earthquakes are very rare, occurring only several times a year.
D. The energy of an earthquake radiates in all directions.
E. The epicenter is located directly on the surface in focus.


Multiple Response
Which three statements are true regarding following a tsunami?
A. Tsunami tidal waves are really big.
B. Most tsunami result of displacement of the seabed in an underwater fault zone.
Tsunami C. are difficult to detect in the open ocean, due to its low speed.
D. A possible warning of a tsunami is the rapid removal of water from the beaches.
E. A tsunami slows and gain height as it approaches land.
How many earthquakes 5th would need to release as much energy as a 8.0 earthquake?
A. 32
B. 1000
C. 32,000
D. 1,000,000
E. 32000000

1 answers

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#1ChuckyAnswered at 2013-04-17 19:19:15
1 - D is not correct . The fault moves at the same speed that grow nails , or about 1 to 2 inches per year.

# 2 - Do not know

# 3 - E and B are not correct. The inner core contains more than uranium, which is still in the radioactive decay . And , the asthenosphere is the upper layer of the upper mantle .

# 4 - B and C are not correct . Earthquakes are very rapid release of energy. And there are hundreds of earthquakes each year .

# 5 - A and C are not correct . Tsunamis have nothing to do with tides . And , tsunamis travel hundreds of miles per hour through the open sea.

# 6 - B is correct. The magnitude of an earthquake is a logarithmic scale . Thus, reading a magnitude 8.0 is 10 ^ 3 times more potent than an earthquake of 5.0. And , the hub 10 is 1000.
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