Plate Tectonics/Earthquake/Volcano Review

Tectonic plates consist of

• continental crust.

• oceanic crust.

• both continental and oceanic crust

• mesosphere

Wegener thought that all the continents were once together in one large continent called

• Gondwanna

• Laurasia

• Eurasia

• Pangaea

Evidence for sea-floor spreading has come from

• fossils in South America and Africa.

• magnetic minerals on the ocean floor.

• ancient climatic conditions.

• the breakup of Pangaea.

What is the area where two tectonic plates meet called?

• a collision

• a mid-ocean ridge

• a boundary

• a rift zone

What type of boundary is formed when plates collide?

• convergent

• horizonal

• divergent

• transform

What type of boundary is formed when plates separate?

• convergent

• horizonal

• divergent

• transform

What type of boundary is formed when plates slide past each other?

• convergent

• horizonal

• divergent

• transform

A break in Earth’s crust along which blocks of crust slide relative to one another is

• a plate.

• a deformation.

• a fault.

• an earthquake.

Which of the following would you expect to see during a nonexplosive eruption?

• hot debris, ash, and gas shooting into the air

• molten rock blowing into the air

• calm lava flows

• violent explosions

Lava with a high viscosity

• is runny, almost like water.

• is thick, like pudding.

• smells like sulphur.

• dries smooth and glassy.