Isochron maps of the seafloor ages indicate that ocean crust is ____.

Tectonic plates interact or meet at places called plate ___________.

Features found at divergent boundaries include _______.

Continental drift was not widely accepted when it was first proposed because _________.

What type of geologic feature can form when portions of subducted ocean plates melt and magma is forced upward in the ocean?

Oceanic crust is made mostly of __________________.

Coal beds in Antarctica indicated to Wegener that this continent was ________________________.

Continental-continental plate collisions form ___________.

Places where tectonic plates move apart are called _____________________.

Places where tectonic plates come together are called ___________________.

At which tectonic plate boundary is crust neither destroyed nor formed? Instead, plates slide horizontally past each other at a _____________.

The driving forces of tectonic plates are related to convection currents in Earth’s ___________________________.

The magnetic pattern of ocean-floor rocks on one side of an ocean ridge is ________________________.

A vast, underwater mountain chain is called a(n) _________.

Which theory states that Earth’s crust and rigid upper mantle are broken into pieces that move in different directions and at different rates over Earth’s surface?

Wegener’s hypothesis of continental drift was later supported by what geological feature?

The San Andres Fault is an example of what kind of plate boundary?

What kind of boundary is this?

What feature is found at the B label?

What process is illustrated by the area labeled G?

The supercontinent in the continental drift hypothesis was called ___________.

The formation of the Hawaiian Islands is associated with ________.