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Jag6 Rocks and Minerals
Rocks and Minerals vocabulary
21
Science
6th Grade
11/10/2009

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Term
Mineral
Definition
a naturally occurring solid in Earth's crust with a definite structure and composition.
Term
Element
Definition
a substance that cannot be broken down any further into anything simpler
Term
Compound
Definition
a chemical combination of two or more elements
Term
Atoms
Definition
the smallest particle of an element that has the same chemical properties of the element.
Term
Physical Property
Definition
a property that can be observed without changing the identity of a substance.
Term
Hardness
Definition
how a mineral resists scratching
Term
Luster
Definition
amount of light that a mineral reflects
Term
Streak
Definition
color of a mineral when it is ground into powder
Term
Density
Definition
Term
texture
Definition
how the surface of a mineral feels to the touch
Term
Moh's Scale of Hardness
Definition
when you scratch a mineral with certain objects to see how hard they are
Term
Rock Cycle
Definition
rocks are continually changing from one to another in a never-ending cycle
Term
Igneous Rock
Definition
formed from hot liquid rock material from volcanoes. It cools and hardens into solid.
Term
Intrusive
Definition
"inside" Earth's crust
Term
Extrusive
Definition
"outside" Earth's crust
Term
Magma
Definition
molten rock below Earth's surface
Term
Lava
Definition
molten rock that flows on Earth's surface from a volcano
Term
Sedimentary Rock
Definition
Bits and pieces of rock clumped together.
Term
Metamorphic Rock
Definition
a rock that forms from another kind of rock that is changed by heat, pressure, or a chemical reaction
Term
Composition
Definition
what a rock or mineral is made up as
Term
Lithosphere
Definition
Earth's crust
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