Describing Matter

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created 8 years ago by traylermn
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updated 8 years ago by traylermn
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Matter

Anything that had mass and takes up space.

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Chemistry

The study of properties of matter and how matter changes.

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Substance

A single kind of matter that is pure, meaning it always has a specific makeup-or composition-and a specific set of properties.

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Physical property

A characteristic of a pure substance that can be observed without changing it into another substance.

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Chemical property

A characteristic of a pure substance that describes its ability to change into different substances.

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Element

A pure substance that cannot be broken down into any other substance by chemical or physical means.

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Atom

The basic particle from which all elements are made.

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Chemical bond

A force of attraction between two atoms.

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Molecule

Groups of two or more atoms held together by chemical bonds.

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Compound

A pure substance made of two or more elements chemically combined in a set ratio.

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Chemical formula

Shows the elements in the compound and the ratio of atoms.

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Mixture

Made of two or more substances-elements, compounds, or both-that are together in the same place but are not chemically combined.

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Heterogeneous mixture

A mixture in which you can see the different parts.

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Homogeneous mixture

A mixture in which the parts are so evenly mixed that you can't see the different parts.

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Solution

An example of a homogeneous mixture, and does not have to be liquid.

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Weight

A measure of the force of gravity on you.

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Mass

The measurement of the amount of matter in the object.

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International System of Units

A system used to measure the properties of matter.

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Volume

The amount of space that matter occupies.

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Density

Relates the mass of material in a given volume. (Mass/Volume)

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Physical Change

Any change that alters the form or appearance of matter but does not make any substance in the matter into a different substance.

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Chemical Change

A change in matter that produces one or more new substances.

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Law of Conservation of Mass

The fact that matter is not created or destroyed in any chemical or physical change.

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Energy

The ability to do work or cause change.

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Temperature

A measure of the average energy of random motion of particles of matter.

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Thermal Energy

The total energy of all the particles in an object.

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Endothermic Change

A change in which energy is taken in.

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Exothermic Change

A change that releases energy.