It is mostly composed of BASALT created in the ridge of volcanoes., mantle, astenosphere, oceanic crust, continental crust, It is about 32 kilometers thick under the continents., Litosphere, Continental Crust, Oceanic Crust, Astenosphere, Where do most of the earthquakes and volcanoes occur?, in the plates boundaries, in the middle of the tectonic plates, in the middle of the continents, in the mantle, It forms FAULTS and earthquakes are quite normal there., convergent boundary, divergengent boundary, transformative boundary, mountains, Where do we find most of big mountains?, in the mid-oceanic ridge, related to convergent boundaries, related to divergent boundaries, related to transformative boundaries, What's the name fo this plate?, Eurasian plate, American plate, Pacific plate, Indo-Australian plate, Of all these layers it is the only one that is PLASTIC., litosphere, oceanic crust, continental crust, astenosphere, What is true of tectonic plates?, they are constantly moving, Earthquakes cause them to move, They don't move for centuries at a time, There are fewer and fewer of them, Which of the following best describes the location of the mantle?, above the crust, between the crust and the litosphere, between the crust and the core, beneath the core, What is the underlying force that drives plate tectonics?, ocean tides, volcanic eruptions, the rock cycle, convection currents, Convection currents are powered by:, motion, pressure, heat, density, When two plates that differ in _________ collide, volcanoes often form nearby., speed, density, thickness, temperature, Molten rock within the Earth's mantle., lava, oceanic crust, basalt, magma, It is the part of the mantle that is a part of the litosphere., lower mantle (semi-rigid), astenosphere, upper mantle (rigid), oceanic ridge, Places on the Earth's surface where magma erupts., mountain, crust, volcanoes, earthquakes

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