Unit A Part 1

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mixture

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23 Terms

1

mixture

A combination of two or more substances that are not chemically combined.

<p>A combination of two or more substances that are not chemically combined.</p>
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2

heterogeneous

A mixture that does not have the same composition and properties throughout; parts of the mixture are noticeably different from one another.

<p>A mixture that does not have the same composition and properties throughout; parts of the mixture are noticeably different from one another.</p>
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3

homogeneous

A mixture in which substances are similar in size and evenly distributed throughout the mixture.

<p>A mixture in which substances are similar in size and evenly distributed throughout the mixture.</p>
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4

pure substance

A substance made of only one kind of element or molecule and cannot be physically separated

<p>A substance made of only one kind of element or molecule and cannot be physically separated</p>
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5

temperature

measures the average speed of particles

<p>measures the average speed of particles</p>
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6

matter

Anything that has mass and takes up space

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7

energy

If you add enough of this to a substance, then the attraction between particles can be broken, changing the state of the substance

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8

endothermic

heat is added to a substance (absorbed)

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9

exothermic

Heat is removed (released) from a substance

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10

plasma

super-heated and excited "gas" that has lost its electrons due to increased energy

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11

Bose-Einstein Condensate (BEC)

particles have almost no motion and clump together in this state of matter due to temperatures at almost absolute zero

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12

absolute zero

At this point, all particle motion will stop

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13

same

How the mass of a solid substance would compare to the mass of the same substance when it melts.

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14

particle model theory

States that all matter is made of particles, particles are always moving, there are spaces between particles, and that changing temperature affects the movement of particles.

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15

atom

the smallest unit of matter (that retains its properties)

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16

Kinetic Molecular Theory

States that all matter is composed of particles (atoms and molecules) moving constantly in random directions

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17

melting

a solid turns into a liquid

<p>a solid turns into a liquid</p>
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18

vaporization

a liquid turns into a gas

<p>a liquid turns into a gas</p>
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19

sublimation

a solid turns into a gas without turning into a liquid

<p>a solid turns into a gas without turning into a liquid</p>
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20

condensation

a gas turns into a liquid

<p>a gas turns into a liquid</p>
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21

freezing

a liquid turns into a solid

<p>a liquid turns into a solid</p>
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22

molecules

A pure substance made of two or more atoms bonded together

<p>A pure substance made of two or more atoms bonded together</p>
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23

PASS

acronym for how to use a fire extinguisher

<p>acronym for how to use a fire extinguisher</p>
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