Chapter 5 Vocab Flashcard

Front

Hypothesis of continents moving across Earth's surface.

Back

Continental Drift

Front

Single landmass that broke apart 200 million years ago, leading to today's continents.

Back

Pangaea

Front

Preserved remains or traces of past organisms.

Back

Fossil

Front

Undersea mountain chain producing new ocean floor.

Back

Mid-ocean Ridge

Front

Process adding new oceanic crust to ocean floor

Back

Seafloor Spreading

Front

Deep valley on ocean floor where oceanic crust sinks toward mantle

Back

Deep-ocean trench

Front

Oceanic crust sinks beneath a deep-ocean trench at a convergent plate boundary.

Back

Subduction

Front

A lithosphere section that moves over the asthenosphere, carrying continental and oceanic crust.

Back

plate

Front

Plate boundary where two plates move apart

Back

Divergent boundary

Front

Plate boundary where two plates move towards each other

Back

convergent boundary