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The Earth's Crust Crossword

Some of these answers are two words. Some of the two worded answers contain a space and some do not. Good luck and have fun! 
Across
Thickest layer of the earth's crust
Name of the innermost part of the earth's crust
A person that studies earthquakes
The modern version of continental drift-a theory that the earth's continents move over time
A person that studies the earth
Scientific ideas which are not yet irrefutable fact, but help to explain aspects of life on earth
A theory that explains how the continents shift overtime
Name for the process of hot material near the earth's core rising and colder mantle rock sinking
Scientist responsible for developing theory of plate tectonics
Down
The name of the outermost layer of the earth
The name for the natural process of breaking down over a long period of time
Energy produced naturally by the heat from the earth's core
Having to do with the body; Tangible or concrete
Malleable layer of the earth's crust that allows the lithosphere to move around
Place where plates move and sink downward
The breaking down of materials caused by natural elements such as water, air and wind
The name for the strong outer layer of the earth's crust that contains the crust and the outer part of the mantle
The name of the process that forms rocks in the earth's crust