6.5 Matter (2018)

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22 Terms

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atom

Basic unit of matter

Smallest particle of an element

<p>Basic unit of matter</p><p>Smallest particle of an element</p>
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elements

any substance that cannot be broken down into simpler substances

<p>any substance that cannot be broken down into simpler substances</p>
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molecules

two or more atoms joined together

<p>two or more atoms joined together</p>
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mixture

a combination of two or more substances that do not lose their identifying characteristics when combined

<p>a combination of two or more substances that do not lose their identifying characteristics when combined</p>
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solution

a mixture in which one substance dissolves in another

<p>a mixture in which one substance dissolves in another</p>
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dissolve

to form a solution by mixing evenly

<p>to form a solution by mixing evenly</p>
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solid

A form of matter that has a definite (fixed) shape and definite volume. It is not easily compressible (little free space between particles) and does not flow easily (rigid - particles cannot move or slide past one another)

<p>A form of matter that has a definite (fixed) shape and definite volume. It is not easily compressible (little free space between particles) and does not flow easily (rigid - particles cannot move or slide past one another)</p>
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liquid

takes the shape of its container, has a definite volume, no definite shape, flows easily (particles can move/slide past one another)

<p>takes the shape of its container, has a definite volume, no definite shape, flows easily (particles can move/slide past one another)</p>
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gas

takes the shape of its container, has no definite volume, compressible (lots of free space between particles), flows easily (particles can move past one another)

<p>takes the shape of its container, has no definite volume, compressible (lots of free space between particles), flows easily (particles can move past one another)</p>
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matter

anything that has mass and volume (takes up space)

<p>anything that has mass and volume (takes up space)</p>
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volume

The amount of space an object takes up

<p>The amount of space an object takes up</p>
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mass

the amount of matter in an object. Measured in grams. It does not change.

<p>the amount of matter in an object. Measured in grams. It does not change.</p>
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density

Mass per unit volume. How tightly packed the molecules are of a substance.

<p>Mass per unit volume. How tightly packed the molecules are of a substance.</p>
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periodic table

A table that shows the elements, their atomic number, symbol, and average atomic mass; elements with similar chemical properties are grouped together.

<p>A table that shows the elements, their atomic number, symbol, and average atomic mass; elements with similar chemical properties are grouped together.</p>
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substance

A single kind of matter that is pure and has a specific set of properties.

<p>A single kind of matter that is pure and has a specific set of properties.</p>
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condensation

The change of a substance from a gas to a liquid; Clouds and moisture on the bathroom mirror are condensation.

<p>The change of a substance from a gas to a liquid; Clouds and moisture on the bathroom mirror are condensation.</p>
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Precipitation

Any form of water that falls from clouds and reaches Earth's surface. Rain, snow, sleet, hail.

<p>Any form of water that falls from clouds and reaches Earth's surface. Rain, snow, sleet, hail.</p>
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evaporation

The change of a substance from a liquid to a gas

<p>The change of a substance from a liquid to a gas</p>
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melting point

The temperature at which a solid becomes a liquid

<p>The temperature at which a solid becomes a liquid</p>
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freezing point

The temperature at which a liquid changes into a solid

Water freezes at 32 degrees Fahrenheit or 0 degrees Celsius

<p>The temperature at which a liquid changes into a solid</p><p>Water freezes at 32 degrees Fahrenheit or 0 degrees Celsius</p>
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The three basic phases of matter

gas, liquid, solid

<p>gas, liquid, solid</p>
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phase change

matter changes from one form to another

<p>matter changes from one form to another</p>