(E8) Review for Flashcard #2 (Lessons 2 & 3)

Front

Where does Sea-Floor spreading occur?

Back

Mid-ocean ridges are the locations where sea-floor spreading occurs.

Front

What is the gradual movement of the continents across the Earth’s surface through geological time called?

Back

Continental drift is the term used to describe the gradual movement of continents.

Front

What are long, narrow depressions on the seafloor called?

Back

Deep oceanic trenches are long, narrow depressions found on the seafloor.

Front

What is the theory that describes the lithosphere of the earth being divided into plates that float on the mantle?

Back

The theory of tectonic plates explains how the lithosphere is divided into plates that move independently.

Front

Rocks on the sea-floor that lie in a pattern show a record of the reversals of Earth's what?

Back

The pattern in sea-floor rocks shows a record of the reversals of Earth's magnetic field.

Front

What is the term for the large landmass that existed millions of years ago, which eventually broke apart into the continents we know today?

Back

Pangaea is the name of the supercontinent that existed before the continents drifted apart.

Front

What geological process involves one tectonic plate sliding under another?

Back

Subduction is the process where one tectonic plate moves under another.

Front

What is the name of the underwater mountain range formed by tectonic activity?

Back

Mid-ocean ridges are underwater mountain ranges formed by tectonic activity.

Front

What is the significance of the magnetic field in relation to sea-floor spreading?

Back

The magnetic field helps to record the history of sea-floor spreading through patterns in the rocks.

Front

What is the term for the large-scale movement of the Earth's lithosphere?

Back

Plate tectonics refers to the large-scale movement of the Earth's lithosphere.