Unit 4 Lesson 3 Vocabulary Flashcards

Front

Fossil

Back

The remains or traces of ancient living things found in rocks.

Front

Paleontology

Back

The study of fossils to learn about life long ago.

Front

Continental Drift

Back

The idea that continents slowly move across Earth’s surface over time.

Front

Mid-Ocean Ridges

Back

Underwater mountain chains where new ocean crust forms.

Front

Deep-Ocean Trench

Back

A deep valley in the ocean floor where one plate sinks beneath another.

Front

Subduction

Back

When one tectonic plate slides under another and sinks into the mantle.

Front

Convection Currents

Back

Movement caused by heat rising and cool material sinking inside the mantle.

Front

Density

Back

How much “stuff” is packed into a space; something denser is heavier for its size.