Aca 8 Ch.2 Properties Of Matter

Front 1

pure substance

Back 1

Matter that always has exactly the same composition.

Front 2

element

Back 2

A substance that cannot be broken down into simpler substances.

Front 3

atom

Back 3

The smallest particple of an element.

Front 4

compound

Back 4

A substance that is made from two or more simpler substances and can be broken down into those simpler substances.

Front 5

heterogeneus mixture

Back 5

A mixture in which the parts are noticeably different from one another.

Front 6

homogeneous mixture

Back 6

A mixture in which the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another.

Front 7

solution

Back 7

When substances dissolve and form a homogeneous mixture and the particles are too small to settle out, be trapped by a filter, or scatter light.

Front 8

suspension

Back 8

A heterogeneous mixture that separates into layers over time.

Front 9

colloid

Back 9

A mixture that contains particles that are large enough to scatter light, but do not separate into layers.

Front 10

physical property

Back 10

Any characteristic that can be observed or measured without changing the composition of the substances in the material.

Front 11

viscosity

Back 11

The tendency of a liquid to resist flowing.

Front 12

conductivity

Back 12

A material's ability to allow heat to flow.

Front 13

malleability

Back 13

The ability of a solid to be hammered without shattering.

Front 14

melting point

Back 14

The temperature at which a substance changes from a solid to liquid.

Front 15

boiling point

Back 15

The temperature at which a substance boils.

Front 16

filtration

Back 16

A process that separates materials based on the size of their particles.

Front 17

distillation

Back 17

A process that separates the substances in a solution based on their boiling points.

Front 18

physical change

Back 18

A change that occurs when some of the properties of a material change, but the substances in the material remain the same.

Front 19

chemical property

Back 19

Any ability to produce a change in the composition of matter.

Front 20

flammability

Back 20

A material's ability to burn in the presence of oxygen.

Front 21

reactivity

Back 21

The property that describes how readily a substance combines chemically with other substances.

Front 22

chemical change

Back 22

A change that occurs when a substance reacts and forms one or more new substances.

Front 23

precipitate

Back 23

Any solid that forms and separates from a liquid mixture.