8th Grade Earth Science Exam Review Chap 12 Crossword
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
 
 
Down: 1) 1. where plates are moving apart (divergent boundaries) 2. where plates are moving together (convergent boundaries) 3. at locations called hot spots2) the solid igneous core of a volcano left behind after the softer cone has been eroded3) a steep-sided, loosely packed volcano formed when tephra falls to the ground4) the steep walled depression around a volcano’s vent5) bits of rock or solidified lava dropped from the air during an explosive volcanic eruption7) the largest intrusive igneous rock bodies8) after many thousands or even millions of years magma reaches earth surface and flows out through an opening10) magma that is forced into a crack parallel to rocks layers and hardens11) when this cycle of lava and tephra is repeated over and over in alternating layers of explosive and quiet eruptions; found mostly where earth’s plates come together and one plate sinks below the other Across: 6) magma that is forced into a crack that cuts across rock layers and hardens9) 1. amount of water vapor and other gases that are trapped in the magma 2. how much silica is present in the magma10) quiet eruptions of basaltic lava spread out in flat layers. The buildup of theses layers forms a broad volcano with gently sloping sides12) an opening in earth that erupts gases ash and other material build up around these opening13) the result of an unusually hot area at the boundary between Earth’s mantle and core that forms volcanoes when melted rock is forced upward and breaks through the crust14) sometimes after an eruption the top of the volcano can collapse. This produces a large depression.
 

 

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