True: Volcanoes and earthquakes occur at destructive plate boundaries, Earthquakes but NOT volcanoes occur at sliding plate boundaries, Oceanic crust is more dense than continental crust, Continental crust is less dense than oceanic crust, Ocean trenches are formed where oceanic and continental plates collide, Destructive plate boundaries occur where oceanic and continental plates collide, Volcanoes and earthquakes occur at constructive plate boundaries, Earthquakes occur at all types of plate boundary, The subduction zone is where the more dense oceanic crust is driven deep inside the earth, Rocks in the subducted oceanic plate are destroyed when they melt, At a destructive plate boundary, the less dense continental plate crumples to form mountains, At constructive plate boundaries, two plates move apart, At destructive plate boundaries, two plates move together, At sliding plate boundaries, two plates move alongside each other, At constructive plate boundaries, magma rises to fill the gap between the plates, At constructive plate boundaries, cooling magma on the Earth's crust forms new igneous rocks, The mid-Atlantic ridge is an example of a constructive plate boundary, The San Andreas fault is an example of a sliding plate boundary, The Andes mountains were formed at a destructive plate boundary, At sliding plate boundaries, pressure builds where rocks in the two plates become stuck, False: Volcanoes can occur at all plate boundaries, At constructive plate boundaries, two plates move together, At destructive plate boundaries, two plates move apart, At sliding plate boundaries, two plates move apart, The continental plate is more dense than the oceanic plate, At destructive plate boundaries, the continental plate is forced deep inside the Earth, Volcanoes but NOT earthquakes occur at sliding plate boundaries, Convection currents in the Earth's crust drive the movement of the tectonic plates, Most major earthquakes and volcanoes occur well away from plate boundaries,

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