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Rock Basics

Rocks & Minerals Information and The Rock Cycle

TermDefinition
Minerals Rocks are made from these natural nonliving solid crystals .
Cenozoic The most recent period of the Geologic Time Scale
Hardness The property of rocks that describes how easily it can be scratched by another rock
Streak The property of rocks that is the color of the powder that it leaves when it is scratched against a special plate
Diamond The hardest rock on the MOH's Scale for hardness
Talc The softest rock on the MOH's Scale for hardness
Erosion The process where water, ice, wind, and/or gravity carries bits of rock, soil, shells, and dead organism materials from one place to another
Sediments Eroded materials that settle on land or at the bottom of waterways, including lakes, river, or oceans
Sedimentary Rocks Rocks formed when sediments are cemented together by pressure and clay materials, then harden
Fossils The remains of living things that are found in sedimentary rocks
Magma Partially melted rock UNDER the Earth's crust
Pumice The type of igneous rock formed with many airholes, allowing it to float on water
Igneous Rocks Rocks that are formed from cooled lava
Metamorphic Rocks The type of rocks that have been changed completely as a result of heat and pressure
Rock Cycle The ongoing process that changes one type of rock into another
Shale The sedimentary rock from which the metamorphic rock slate may be formed
Limestone The sedimentary rock from which the metamorphic rock marble may be formed
Quartz The igneous rock from which the metamorphic rock gneiss may be formed
Precambrian The oldest period of the Geologic Time Scale
Luster The property of rocks that describes the way it reflects light
Created by: Rvanmeter