Tic-Tac-Toe #1 Crossword

Wegener's idea that the continents slowly moved under Earth's surface
A super-continent that existed about 300 million years ago
Any trace of an ancient organism that has been preserved in rock
Mountain ranges that run along the ocean floor
New material that is continually added to mid-ocean ridges
Deep, underwater canyons
Where plates move apart from each other
Where plates move apart from each other
Where plates slip past each other
The theory that Earth's plates are in slow, constant motion, driven by convection currents in the mantle
Breaks in Earth's crust where rocks have slipped past each other
Where pieces of Earth's crust diverge on land
Where two plates come together
Where two plates pull apart
Where two plates slip past each other
The shaking and trembling that results from movement of rock beneath Earth's surface