reverse Pure Substances and Mixtures Flashcards

1
Q

term used to describe a substance that does not appear uniform throughout (196)

A

heterogeneous

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2
Q

term used to describe a substance that appears uniform throughout (195)

A

homogeneous

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3
Q

energy that an object or system has because of its motion; particles of matter have kinetic energy (200)

A

kinetic energy

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4
Q

matter that does not have a definite shape but does have a definite volume; the particles in a liquid are close together but can move easily around each other (194)

A

liquid

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5
Q

anything that has mass and takes up space; can be classified by its physical state (solid, liquid, or gas) and by composition (pure substance or mixture) (194)

A

matter

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6
Q

heterogeneous mixture; a mixture made up of many different substances, each with a different appearance and properties; a heterogeneous mixture does not have a uniform composition (196)

A

mechanical mixture

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7
Q

change of state from a solid to a liquid; it involves adding heat (203)

A

melting

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8
Q

A
combination of two or more different substances; the substances are not chemically combined and may be separated again (195)

A

mixture

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9
Q

very small portion of matter that cannot be seen with the eyes alone (199)

A

particle

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10
Q

mix a substance (solute) with another substance (solvent) to form a solution (e.g., salt with water) (196)

A

dissolve

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11
Q

theory that states that all matter is made up of particles; that all particles of one substance are identical; that particles of matter are in constant motion; that temperature affects the speed at which particles move; that particles have forces of attraction between them; and that there are spaces between particles; this theory explains the behaviour of solids, liquids, and gases (200)

A

particle theory of matter

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12
Q

matter that has uniform properties and is one type of substance throughout (195)

A

pure substance

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13
Q

matter that has a definite shape and volume; in a solid, the particles are packed tightly together and vibrate in place (194)

A

solid

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14
Q

A
change of state from a liquid or gas to a solid; it involves removing heat; also called freezing (203)

A

solidification

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15
Q

homogeneous mixture of two or more substances, which may be solids, liquids, or gases or a combination of these (196)

A

solution

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16
Q

change from the solid state directly to the gas state; it involves adding energy (203)

A

sublimation

17
Q

measurement of the average kinetic energy of the particles in a substance (201)

A

temperature

18
Q

change of state from a liquid to a gas; it involves adding heat; also called vaporization (203)

A

evaporation (vaporization)

19
Q

change of state from a gas to a liquid when heat is removed (203)

A

condensation

20
Q

change from the gas state directly to the solid state; it involves removing energy (203)

A

deposition

21
Q

change from one of the three states of matter to another (202)

A

change of state