Standard 2 Objective 3 STUDY NOTES PLATE BOUNDARIES" 1 Two plates slide past each other horizontally at a _________ boundary. transform 2 The Pacific Ring of Fire is a zone of active _________. volcanoes 3 When the oceanic and continental lithospheres collide, the _______ plate _________. oceanic subducts 4 Tectonic plates can include both oceanic and ___________ crust. continental 5 Food, water, flashlights, and a portable radio are needed to _______ for earthquakes. prepare 6 The ________ of an earthquake is the point on Earths surface directly ______ the earthquakes focus. epicenter above 7 The theory that explains why and how continents move is called _____ tectonics. plate 8 An example of a _________ boundary is the San Andreas Fault in California. transform 9 Convection, _____ push, and slab ____ work together to produce constant tectonic plate _______. ridgepull motion 10 Frequent earthquakes in an area may indicate tectonic plate ___________. boundaries 11 The hottest rock is found in __________ zones and under mid-ocean ___ valleys. subduction rift 12 During a major earthquake, buildings may sway or ________. collapse 13 The two sources of energy heating Earths mantle are radioactive _______ and heat from Earths _______. decay interior 14 Subduction is when one plate goes ________ another. beneath 15 Plates move away from each other at a mid- __________ ridge. mid-ocean 16 If you are indoors during an earthquake you should stay away from ________ and objects that may fall; _____ in a doorway. windows stand 17 As Australia drifted away from Asia, its animal life ________ into different forms than Asia. evolved 18 The movement of heated materials ________ and the movement of cooled materials downward is called __________. upward convection 19 ___________ usually occur at plate boundaries when rock in environments near tectonic plate boundaries experience great ______. Earthquakes stress 20 When two oceanic plates collide the ________ plate ________. denser subducts 21 The rise of the Himalayan Mountains changed world _____ patterns. wind 22 Rock begins to sink when it has ______ and becomes denser. cooled 23 At the center of a mid-ocean _____ is a ____ valley. ridgerift 24 Tectonic _____ are blocks of __________.plates lithosphere 25 The collision of two __________ plates results in the formation of _________. continental mountains 26 Earths tectonic plates ______ when heat creates __________ currents in Earths mantle. move convection 27 The breakup of Pangea changed the ____ of the continents and world ________. size climates 28 A __________ plate boundary will pull the rest of the plate _____. subducting down 29 Earthquakes generally occur at plate boundaries, where ______ on rocks is greatest. stress 30 The Himalaya Mountains were formed in a ________ at a convergent boundary. collision The End