Assessment No. 2 - Science 10

The theory that the continents have not always been in their present locations but have moved there over millions of years

• a. Continental Drift Theory

• b. Plate Tectonics

• c. Alfred Wegener

• d. Big Bang Theory

Thinner, more dense, younger crust, primarily basaltic, making ocean floor

• a. mantle

• b. continental crust

• c. oceanic crust

• d. asthenosphere

The process that creates new seafloor as plates move away from each other at the mid-ocean ridges

• a. hotspot

• b. seafloor spreading

• c. subduction

• d. shearing stress

A valley formed by the separation of tectonic plates

• a. deep ocean trench

• b. rift valley

• c. oceanic ridge

A teacher asks her students to make a model of a transform plate boundary. The students used blocks to represent tectonic plates and slid the blocks past each other in the direction of the arrows as shown. Which event can the students best demonstrate with their model?

• a. An earthquake

• b. A volcanic eruption

• c. Formation of a rift valley

• d. Building up of a mountain

A mid-ocean ridge separates the Pacific and the Nazca plate off the western coast of South America. Which statement best describes the relative motions of the Pacific and Nazca plates?

• a. The Pacific and Nazca plates are both moving to the east.

• b. The Pacific and Nazca plates are both moving to the west.

• c. The Pacific plate is moving to the west, and the Nazca plate is moving to the east.

• d. The Pacific plate is moving to the east, and the Nazca plate moving to the west.

This diagram shows a model of the movement of two tectonic plates. When the plates collide, one plate often moves below the outer plate. The rising magma that can result from this type pf plate movement may produce _____

• a. fossil layers

• b. volcanic islands

• c. deep-sea sediments

• d. seafloor spreading

The model below shows two continental plates. The folded mountains in this model form at which type of plate boundary?

• a. Transform boundary

• b. Divergent boundary

• c. Subduction boundary

• d. Convergent boundary

Where would you expect the next island in this chain to form?

• a. to the left of A

• b. between D and E

• c. to the right of E

• d. between A and B

Which island is the oldest?

• A

• B

• C

• D

• E