Alfred Wegener observed that which two continents looked like they fit together?

At this kind of plate boundary, tectonic plates pull away from each other

At what kind of plate boundary does subduction happen?

When tectonic plates pull apart underwater, this feature is created

When liquid or gas is heated, it becomes less dense, and this happens

What is the layer beneath the crust?

At this kind of plate boundary, tectonic plates move toward each other

At what kind of plate boundary is new crust created?

When an oceanic plate subducts under another oceanic plate, this feature is created.

The flow of material in the Earth's mantle drags tectonic plates around. What is this flow called?

The name for the super continent when all land was connected

This kind of crust is dense, and rides low on the mantle

What kind of plate boundary experiences earthquakes, but has no specific geologic features?

When tectonic plates pull apart on land, this feature is created

What is a common geologic feature found at subduction zones between seafloor plate and continental plate?

Why was the Continental Drift hypothesis of Wegner's not accepted?

This kind of plate boundary caused the Himalayas.

What geologic feature will be found on the ocean floor at a subduction zone?

This country sits on top of the Mid-Atlantic Ridge

Where is the newest crust on the Earth found?

Fossils found in Antarctica shows that it used to be located where?

This kind of tectonic plate boundary runs through southern California

What did Harry Hess discover?

The volcanoes that encompass the Pacific Ocean is called ___.

Before the work of Harry Hess, this was thought to be flat.