The area where two tectonic plates meet is called the:

What is the "engine" that moves the tectonic plates?

The convection current in the mantle causes __________ magma to rise.

The convection current in the mantle causes __________ magma to sink.

The layer of rock which forms the continents is __________ crust.

A thin layer of crust that underlies the ocean basins is __________ crust.

Which crust is thicker, oceanic crust or continental crust?

Which crust is MORE dense, oceanic crust or continental crust?

Which crust is LESS dense, oceanic crust or continental crust?

At a __________ plate boundary, plates collide or come together.

At a __________ plate boundary, plates divide or move apart.

At a _________ plate boundary, plates slide past each other.

When continental plate converges or collides with another continental plate, what is formed?

When a continental plate converges or collides with an oceanic plate, what is formed?

When two continental crusts diverge or move apart, what is formed?

When two oceanic crusts divide or move apart, __________ is formed (mountains under the ocean).

When plates slip sideways past each other at a transform boundary, it creates _________.

At which type of boundary is crust destroyed?

At which type of boundary is crust created?

At which type of boundary is crust neither created or destroyed?

A fault line is formed by the movement of a _________ plate boundary.

The land mass where all of the continents were once together in one large continent is called:

The plates sit on top of a layer of molten magma. Molten means:

The theory that continents were once connected but have drifted apart:

When two oceanic crusts diverge, hot magma rises and new crust is created. This process is called:

Put a check next to the two theories that make up the Theory of Plate Tectonics:

Who developed the Continental Drift Theory, but at the time didn't know what made the continents move?

Who discovered Seafloor Spreading - that magma was rising on the seafloor, causing it to spread and causing large plates to move?

The Ring of Fire is a long chain of volcanoes that surround the Pacific Ocean. It is the site of frequent earthquakes and volcanic eruptions. Why is it one of the most geologically active areas on Earth?