Rocks That Exhibit Ductile Strain Were Probably Deformed Choose one answer.

at the surface of the earth.

when they were cold.

when the stress was applied very rapidly.

at a depth within Earth at elevated temperatures.

Incorrect

If rocks exhibit ductile behavior when exposed to compressive stress, they generally will form

Choose one answer.

normal faults.

folds.

reverse faults.

joints.

Incorrect

Which of the following types of strain does not result in permanent deformation?

Choose one answer.

tension

elastic strain

plastic strain

brittle strain

Incorrect

Faults are geologic structures that result from which type of strain?

Choose one answer.

a. brittle strain

b. ductile strain

c. elastic strain

plastic strain

Incorrect

Question 5

In the Lesson 4 Topic 2 video, "Measuring Earthquake Intensity and Magnitude," you were able to see that the rupture from the 1906 earthquake traveled from mile marker 80 to mile marker 100 in 10 seconds. At what speed did the 296 miles of San Andreas Fault rupture during the 1906 earthquake?

Choose...

2 miles per second
b. 200 miles per second

c. 2 miles per hour

d. 2,000 miles per secong

Incorrect

Question 6

What happens to existing oceanic crust as magma extrudes and solidifies at an oceanic ridge?

Choose one answer.

a. The crust breaks in half and moves away from the ridge.

b. The crust crumples as it encounters resistant, older and cooler rocks on either side of the ridge.

c. The crust subducts beneath the ocean floor and returns to the mantle.

d. The crust melts because of the intense pressures at the volcanically active zone.

Incorrect

Question 7

The deepest earthquake foci occur at ____ plate boundaries.

Choose one answer.

a. convergent

b. divergent

c. transform fault

d. subvergent

Incorrect

Question 8

Accreted terranes are characteristic features of many

Choose one answer.

a. hot spots.

b. divergent plate boundaries.

c. transform faults.

d. convergent plate boundaries.

Incorrect

Question 9

Shakemaps, which present a visual image of the relative amount of shaking in…