(F) Unit 1 Lesson 3 Vocabulary

Front

Fossils

Back

Remains or impressions of prehistoric organisms preserved in rock.

Front

Continental Shelf

Back

The extended perimeter of each continent, which is submerged under relatively shallow seas.

Front

Mid-Ocean Ridge

Back

An underwater mountain range formed by plate tectonics.

Front

Ocean Ridge

Back

A continuous mountain range on the ocean floor, formed by plate tectonics.

Front

Ocean Trench

Back

Deep underwater troughs created by one plate subducting under another.

Front

Rift Valley

Back

A lowland region formed by the divergence of tectonic plates.

Front

Sea-Floor Spreading

Back

The process by which new oceanic crust is formed at mid-ocean ridges and slowly moves away.

Front

Tectonic Plates

Back

Massive slabs of solid rock composing the Earth's lithosphere.

Front

Pangaea

Back

A supercontinent that existed during the late Paleozoic and early Mesozoic eras.

Front

Convergent Boundaries

Back

Tectonic plate boundaries where two plates move toward each other.