2nd 9wks--Benchmark Assessment

1. Mid-ocean ridges are

A) found in all of Earth's ocean's.
B) found only in the Pacific Ocean.
C) located along the coast.
D) long deep-ocean trenches.

2. Most geologists think that the movement of Earth's plates is caused by

A) earthquakes.
B) convection currents.
C) Earth's magnetic field.
D) conduction.

3. A place where two plates slide past each other, moving in opposite directions, is known as a

A) divergent boundary.
B) convergent boundary.
C) rift valley.
D) transform boundary.

4. S waves are known as

A) primary waves
B) secondary waves
C) Q waves
D) Surface waves

5. What type of earthquake wave can travel through solids, liquids, and gases?

A) s waves
B) rift valley.
C) p waves.
D) surface waves

6. If geologists detect small earthquakes in an area near a volcano, what can they infer about the volcano?

A) It is extinct.
B) It is dormant.
C) It is probably ready to erupt.
D) It is a good source of energy.

7. What does a seismograph record?

A) The vibrations caused by seismic waves.
B) The location of the focus.
C) The location of the epicenter.
D) The Mercalli scale rating.

8. What is the correct order of the Earth's layers (starting at the surface)?

A) crust, outer core, mantle, inner core
B) mantle, core, crust, inner core
C) outer core, mantle, inner core , crust
D) crust, mantle, outer core, inner core

9. Before lava reaches the surface, the molten material is called

A) rock.
B) magma.
C) volcanic ash.
D) fire.

10. The place where two plates collide or compress together is known as a

A) transform boundary.
B) rift valley.
C) divergent boundary.
D) convergent boundary.

11. The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle is known as

A) subduction.
B) conduction.
C) continental drift.
D) convention.

12. During sea-floor spreading, molten material rises from the mantle and erupts

A) along mid-ocean ridges.
B) along the edge of the continents.
C) at the north and south poles.
D) along the edges of the coast.

13. The type of seismic waves that occur first are called

A) s waves.
B) surface waves.
C) q waves.
D) p waves.

14. A collision between two pieces of continental crust at a converging boundary forms

A) mountains.
B) rifts.
C) trenches.
D) valleys.

15. The geological theory that states that pieces of the Earth's lithosphere are in constant, slow motion is the theory of

A) subduction.
B) boundary.
C) plate tectonics.
D) sea-floor spreading

16. Geologists cannot yet predict earthquakes because

A) they can't be sure of when or where the stress will be released along the fault.
B) there are too many faults to monitor.
C) they have too much data.
D) they don't know what an earthquake is.

17. What is Pangaea?

A) name of a continent.
B) the name of an ancient fossil.
C) the name of a scientist.
D) the name of the supercontinent that is believed to have existed millions of years ago.

18. Earth's INNER core is

A) layer of hot magma.
B) a layer of cooled rock.
C) empty.
D) a dense ball of iron and nickel.

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