Ch. 3 Plate Tectonics

Front

The lithosphere is broken into sections called _________, which float on top of the asthenosphere.

Back

plates

Front

Any trace of an ancient organism that has been preserved in rock is called a _________.

Back

fossil

Front

If subduction occurs faster than ocean crust can be created, an ocean will expand. TRUE or FALSE?

Back

FALSE

Front

Old oceanic crust is more dense than new oceanic crust because it is _________.

Back

cool

Front

Oceanic crust near the mid-ocean ridge is ________ than oceanic crust farther away from the ridge.

Back

younger

Front

The layer of Earth that is semi-fluid and allows tectonic plates to move is called the _________.

Back

asthenosphere

Front

The process by which one tectonic plate moves under another is called _________.

Back

subduction

Front

The boundary where two tectonic plates slide past each other is known as a _________.

Back

transform boundary

Front

The theory that explains the movement of Earth's plates is called _________.

Back

plate tectonics

Front

The geological feature formed at divergent boundaries is called a _________.

Back

mid-ocean ridge