Unit 1 Exam Review

Approximately how long did the S-wave take to travel from the epicenter to location A?

Hint: you need your reference table!

• 11 min 15 sec

• 9 min 35 sec

• 5 min 20 sec

• 4 min 20 sec

At which location is the arrival-time difference between the P-wave and the S-wave greatest?

• A

• B

• C

• D

If seismograph station B receives the first P-wave at 09:35:20, at what time did the earthquake occur?

• 09:05:00

• 09:06:15

• 09:29:05

• 09:33:25

Which layer of Earth's interior is inferred to be composed of solid iron and nickel?

• asthenosphere

• stiffer mantle

• outer core

• inner core

• 1

• 2

• 3

• 4

• a

• b

• c

• d

Active volcanoes are most abundant along the

• edges of tectonic plates

• eastern coastline of continents

• 23.5^° N and 23.5^° S parallels of latitude

• equatorial ocean floor

If a seismic station is 3200km from an earthquake epicenter, what is the time needed for an S-wave to travel from the epicenter to the seismic station?

• 4 min 40 sec

• 6 min 0 sec

• 10 min 40 sec

• 11 min 10 sec

Compared to the surrounding material, mantle plumes rise toward Earth's surface from the core-mantle boundary because they are

• cooler and less dense

• cooler and more dense

• hotter and less dense

• hotter and more dense

What are the inferred pressure and temperature at the boundary of Earth's stiffer mantle and outer core?

• 1.5 million atmospheres pressure and an interior temperature of 4950^° C

• 1.5 million atmospheres pressure and an interior temperature of 6200^° C

• 3.1 million atmospheres pressure and an interior temperature of 4950^° C

• 3.1 million atmospheres pressure and an interior temperature of 6200^° C