Plate tectonics

Plates slide past each other at _________________ boundaries.

• divergent

• convergent

• transform

• universal

Plates slide apart along _____________ boundaries.

• convergent

• divergent

• transform

• universal

Which feature forms at convergent boundaries?

• trench

• rift valley

• mountain range

• mid-ocean ridge

In sea-floor spreading, molten material rises from the mantle and erupts

• along the edges of all the continents.

• along mid-ocean ridges.

• in deep-ocean trenches.

• at the north and south poles.

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

• convection.

• continental drift.

• subduction.

• conduction.

The place where two plates come together is known as a _______

• transform boundary.

• divergent boundary.

• convergent boundary.

• rift valley.

Below is a picture of sea-floor spreading. How are the ocean crusts moving?

• Converging

• Diverging

• Sliding

• No movement

Where would the oldest rock be found?

• L
• M
• N
• O

What are the two types of crust

• continental and oceanic

• ocean and upper

• lower and upper

• Rift and sub-rift

What is Pangaea?

• the name of a German scientist
• the name of the super-continent that existed millions of years ago
• another name for continental drift
• the name of an ancient fossil