4-1 Lesson Review

Front

What is a hypothesis?

Back

A testable prediction, often implied by a theory.

Front

What is an ocean trench?

Back

A deep, underwater valley in the deepest part of the ocean.

Front

What is sea-floor spreading?

Back

The process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies.

Front

What is continental drift?

Back

The gradual movement of the continents across the Earth's surface.

Front

What is a mid-ocean ridge?

Back

An underwater mountain chain where new ocean floor is formed.

Front

What is tectonic plate?

Back

A massive slab of solid rock that makes up the Earth's lithosphere.

Front

What is the lithosphere?

Back

The rigid outer layer of the Earth, consisting of the crust and upper mantle.

Front

What is magma?

Back

Molten rock located beneath the Earth's surface.

Front

What is the mantle?

Back

The layer of the Earth between the crust and the core, composed of semi-solid rock.

Front

What is the core of the Earth?

Back

The innermost layer of the Earth, made up of iron and nickel.