Vocab List 5 Types of Rocks

Term Definition
Metamorphic Rock another type of rock that has been changed by heat and PRESSURE or chemical reaction.
Igneous Rock formed from minerals that have melted deep within the Earth, but then COOLED.
Sedimentary Rock formed from particles when sediment is deposited, compacted and cemented together.
Rocks natural solid made up of minerals.
Minerals natural solid made up of pure elements.
Streak powder left behind by when a rock is rubbed against an unglazed porcelain plate or tile.
Luster the way light reflects light, such as metallic or non metallic.
Hardness the ability to be scratched or scratch another mineral.
MOHs scale of hardness The larger the number, the harder the mineral. The lower the number, the softer the mineral.
Mid Ocean Ridge Plates pull apart. New lithosphere is formed.
Convergent Boundary plates collide. Causes mountain ridges, volcanoes, or islands.
Transform Boundary plates slide past each other and scrape. Causes earthquakes.
Lithosphere Rigid solid made up of the crust and upper mantle.
Plate tectonic chunk of lithosphere floating on the asthenosphere.
Asthenosphere Putty, non-rigid solid rock found in the mantle.

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