Front

What is the mid-ocean ridge?

Back

A mountain range on the ocean floor where new crust forms

Front

Subduction

Back

When oceanic crust sinks under another plate into a trench

Front

Which of the following is an ocean trench?

Back

A deep underwater valley where subduction occurs

Front

A hypothesis is...

Back

A testable explanation based on evidence

Front

How do fossils provide evidence for plate movement?

Back

Fossils of the same species are found on different continents

Front

What is one way climate supports the theory of continental drift?

Back

Glacier evidence is found in places that are now warm

Front

How do land features support the theory of plate movement?

Back

Mountain ranges on different continents match up

Front

Why does sea-floor spreading create new ocean crust?

Back

Magma rises at the mid-ocean ridge and cools

Front

What eventually happens to old ocean crust?

Back

It gets subducted into ocean trenches and melts