9. BOWER Plate Tectonics

Earth’s crust is made up of tectonic plates. This diagram shows two plates found under the Himalaya Mountains. Which of the following statements best describes the tectonic plates shown in the diagram?

• a. Two convergent plates, one continental and one oceanic

• b. Two convergent continental plates

• c. Two divergent continental plates

• d. Two divergent plates, one continental and one oceanic

The Great Rift Valley in Africa is a land feature on Earth’s surface caused by the movement of crustal plates. Continued movement of the plates is gradually making the rift deeper. How are the plates around the Great Rift Valley moving?

• a. The plates are colliding.
• b. One plate is sliding beneath a less dense plate.
• c. The plates are grinding against one another along a fault
• d. The plates are spreading apart and moving in opposite directions.

Different plate boundaries lead to certain events above and below the surface. Where are most mountains on Earth formed?

• a. At volcanic chains
• b. At strike slip faults
• d. At convergent plate boundaries
• c. At mid-ocean ridges

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

Volcanoes can form when certain plates interact. Which of the following would be the least likely cause of a volcanic eruption?

• a. Tectonic plates colliding
• b. Gas pressure within Earth’s crust
• Tectonic plates sliding past each other
• d. New magma flowing into an already full magma chamber

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

What happens at a transform tectonic plate boundary?

• Two tectonic plates pulls away from one another.
• Two tectonic plates push towards one another.
• Two tectonic plates slide against each other.

Volcanoes often form at convergent plate boundaries. Which set of arrows represents a convergent plate boundary?

• > <
• < >
• ^ ^
• ^ v

A plate boundary is a place where two tectonic plates meet. There are several types of tectonic plate boundaries. Which statement below shows the correct definition of a tectonic plate boundary?

• At a transform boundary, plates move apart.
• At a convergent boundary, plates slide past each other.
• At a divergent boundary, one plate sinks under another plate.
• At a divergent boundary, plates separate.

Using underwater sonar, scientists create a map of the ocean floor. Data from the middle of the Atlantic Ocean reveals a large undersea mountain range. Which type of boundary caused this mid ocean ridge?

• convergent

• divergent

• transform

• subduction

Where would you be most likely to find a trench formed?

• the convergent boundary of two oceanic crusts
• the divergent boundary of two continental crusts
• along fault lines in California
• at the subduction zone where oceanic and continental crusts converge.

Which letter represents the layer on which the tectonic plates move?

• A

• B

• C

• D