Plate Tectonics

The continent of South America sits on the

Which regions of tectonic plates are the most dense?

The boundary between two tectonic plates can be found

A divergent boundary between tectonics plates can form

What is the name of the single landmass which split into the continents millions of years ago?

A convergent boundary between two plates can form

Which regions of tectonic plates are the thickest?

Which tectonic plate is submerged entirely underwater?

What causes tectonic plates to move?

Alfred Wegener's hypothesis of continental drift

The boundary between the South American plate and the Nazca plate formed

Rocks formed at mid-oceanic ridges push high and cool but move away as new rock rises. This is:

When two plates collide into each other they form a

Alfred Wegener's continental drift hypothesis suggested that

The lithosphere is divided into pieces called

The outermost, rigid layer of Earth is called the

When one plate pushes under another, the leading edge of that plate sinks down faster. This is:

In the mid-twentieth century, scientists examined Wegener's hypothesis again when they found

What evidence led Wegener to develop his hypothesis?

As the mantle heats up, it rises and pushes cooler material down to heat up again. This is:

Which of these is NOT a type of plate boundary?

When two plates move away from each other they form a

Name an example of a transform boundary between two plates:

When two plates move horizontally past each other they form a

Scientists consider this tectonic motion to be the most important. It is also the fastest.