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Plate Tectonics

Across
Affects the structure of the earth's crust
Upper layer of the earths mantle
Time of life
When the ground shakes violently
Gradual movement of continents
Changing shape
Land mass that broke apart 175 million years ago
Variation between upper and lower limits
All existing matter
Stretch of land
Down
Rigid outer layer of the earth
Continent made up of Pangea split
Force between moving surfaces
A wide area
Founding father of plate tectonics
Strength or energy to move something
Word relating to the ocean
Downward movement
Lava and rock erupting from earths crust
Layer of earth between the crust and outer core