1) Seafloor Spreading is caused by ... a) convection in the lithosphere b) convection in the asthenosphere c) moon's gravitational pull d) Earth's rotation 2) Convergent plates come together due to what force? a) convection b) compression c) tension d) shearing 3) Divergent plates a) split and separate b) push together c) subduct d) slide past each other 4) Mountains are rising and growing due to ... a) plate subduction b) plates shearing past one another c) plate compression d) plates pulling apart 5) A trench is where  a) compression happens b) tension happens c) subjuction happens d) shearing happens 6) At a trench, an ocean plate will sink under a continental plate because it is ... a) splitting apart b) less dense c) sliding past the other d) more dense 7) A rift valley on land is like mid-ocean ridge because of ... a) shearing force b) compressional force c) tensional force d) subduction 8) Matter is never created or destroyed in a closed system but it ... a) may be recycled b) may be changed into another form c) both recycled and change form

Plate Tectonics

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