Topic 4 Lesson 1 Science Vocabulary

Front

Alfred Wegener's idea that the continents slowly moved over Earth's surface

Back

continental drift

Front

the supercontinent on Earth 300 million years ago

Back

Pangaea

Front

any trace of an ancient organism that has been preserved in rock

Back

fossil

Front

German scientist who used evidence from land features, fossils, and climate to support his theory of continental drift

Back

Alfred Wegener

Front

The longest mountain ranges that rise up from the ocean floor

Back

mid-ocean ridge

Front

The process that adds more crust to the ocean floor

Back

sea-floor spreading

Front

Underwater canyon where the ocean floor slowly sinks back down into the mantle

Back

deep-ocean trench

Front

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

Back

subduction

Front

FARTHER AWAY from mid-ocean ridges

Back

OLDER rock

Front

CLOSER to mid ocean ridge.

Back

NEWER rock