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192-Granite and Gabbro $10.00
Mystery includes rock, fossil, or mineral sample and Mystery questions with teaching instructions.

-- A piece of granite clearly showing coarse crystal grains
-- A piece of dark-colored gabbro

-- To introduce two major igneous rock types, granite and gabbro and to understand the differences in felsic (granite) rocks and mafic (gabbro) rocks
-- To recognize mineral differences between granite and gabbro based upon color and weight
-- To define density and perform an experiment to discover the densities of granite and gabbro
-- To formulate and test a hypothesis regarding density differences between granite and gabbro
-- To relate the density differences between granite and gabbro to density distribution within the Earth and to the formation of the Earth’s layers (Core, Mantle, Ocean Crust and Continents)
-- To introduce the notions that, 1) igneous rocks form hundreds of meters beneath the ground surface, 2) rocks melt and form magma inside the Earth, 3) granite forms from melted continental rocks, and gabbro forms from melted mantle rocks, and, 4) the different color, weight and mineral composition between gabbro and granite can be explained by their different origins inside the Earth

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Ruth Deike
Rock Detective Geoscience Education
395 Deer Run Drive
Nellysford , VA 96080

Phone: 434-263-3737



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