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Slide 1 Announcements 25 people have still not joined the class on Astronomy Place. You can not get credit until you “join the class”. Once you join, all your previous…

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Chapter 4 Volcanism and Extrusive Rocks Index  Picture on pg. 77   Definitions Magma – Molten rock, usually mostly silica. Lava – Magma on the earth’s surface.…

Volcanoes and Plate Tectonics Section 1- Pages 88-91 1- Where are volcanoes found? Most volcanoes occur at plate boundaries. Either divergent boundaries like the mid-ocean…

Volcanoes and Plate Tectonics Section 1- Pages 88-91 1- Where are volcanoes found? Most volcanoes occur at plate boundaries. Either divergent boundaries like the mid-ocean…

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Volcanoes and Plate Tectonics Section 1- Pages 88-91 1- Where are volcanoes found? Most volcanoes occur at plate boundaries. Either divergent boundaries like the mid-ocean…