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Seafloor Siphons or What’s Going on in the Basement?! INTRODUCTION Water Cycle Students: On your own paper, draw a diagram of the water cycle and label the parts Groundwater Terms Porosity – amount of open space within a rock unit Permeability – how interconnected the open space within a rock is; ability of water to flow through a material. Aquifer – high porosity and permeable geologic material through which fluid can easily flow. Plate Tectonic Review Plate Boundary Terms Divergent Boundaries – two plates moving apart – new crust being formed (ex – mid ocean ridges) Convergent Boundaries – two plates colliding results in either subduction zones or mountain formation Transform Boundaries – two plates sliding past each other Major Tectonic Plates of the world http://www.moorlandschool.co.uk/earth/te ctonic.htm Optional Video Resource National Geographic Education – Plate Tectonics with Bob Ballard (5:47min) Global Heat Flow Diagram Pollack, H.N., Hurter, S.J., and Johnson, J.R., Heat flow from the earth's interior: analysis of the global data set, Reviews of Geophysics 31(3), 267-280, 1993.