Review for chapter 1 plate tectonics Crossword

When continents drift together to form the supercontinent
When continents slowly move over earth's surface
Any trace of an ancient organism that has been preserved in rock
Is a device that bounces sound waves off underwater objects and then records the echoes of these sound waves
An undersea mountain chain where new ocean floor is produced, a divergent boundary
When a process continually adds new material to the ocean floor
Where the ocean floor plunges into deep underwater canyons
The process by which ocean floor sinks beneath a deep-ocean trench and back into the mantle
Where the lithosphere is broken into separate sections
A well-tested concept that explains a wide range of observations
States that pieces of earth's lithosphere are in a slow, constant motion, driven by convection currents in the mantle
It breaks into the earth's crust where rocks have slipped past each other to form along these boundaries
The place where two plates move apart, or diverge
When a deep valley forms along the divergent boundary
The place where two plates come together, or converge
Is a place where two plates slip past each other, moving in opposite directions
Pulls on the crust, stretching rock so that it becomes thinner in the middle
When a stress force squeezes rock until it folds or breaks
Stress that pushes a mass of rock in two opposite directions
A force that acts on rock to change its shape or volume