Prentice Hall Phyical Science Concepts In Action Chp 2,3,4,5

Front 1

Pure Substance

Back 1

Matter that always has exactly the same composition ; an element or compound

Front 2

Element

Back 2

A substance that cannot be broken down into simpler substance

Front 3

Atom

Back 3

The smallest particle of an element

Front 4

Compound

Back 4

A substance that is made from two or more simple machines that operate together

Front 5

Heterogeneous Mixture

Back 5

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

Front 6

Homogeneous Mixture

Back 6

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

Front 7

Solution

Back 7

A mixture that forms when substance dissolve and form a homogeneous mixture

Front 8

Suspension

Back 8

A heterogeneous mixture that separates into layers over time

Front 9

Colloid

Back 9

A mixture that contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension

Front 10

Physical Property

Back 10

Any characteristic of a material that can be observed or measured without changing the composition of the substance in the materials

Front 11

Viscosity

Back 11

The tendency of a liquid to keep from flowing; resistance to flowing

Front 12

Conductivity

Back 12

A material's ability to allow heat or electric charge 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 a liquid

Front 15

Boiling Point

Back 15

The temperature at which a substance boils; the temperature at which vapor pressure is equal to atmospheric pressure

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 substance in a solution based on their boiling points

Front 18

Physical Change

Back 18

A change that occurs when some properties of a materials change, but the substance in the materials stay the same

Front 19

Chemical Property

Back 19

Any property that produces 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 substance

Front 22

Chemical Change

Back 22

Change that occurs when a substance reacts and forms one or more new sustances

Front 23

Precipitate

Back 23

A solid that forms a liquid mixture

Front 24

Solid

Back 24

The state of matter in which materials have a definite shape and a volume

Front 25

Liquid

Back 25

A state of matter in which a materials has a definite volume but not a definite shape

Front 26

Gas

Back 26

The state of matter in which a material has neither a definite shape nor a volume

Front 27

Kinetic Energy

Back 27

The energy an object has due to its motion

Front 28

Pressure

Back 28

The result of force distributed over an area

Front 29

Absolute Zero

Back 29

A temperature of 0 kelvins

Front 30

Charles's Law

Back 30

The direct proportion of the volume of a gas to its temperature (in kelvins) if the pressure and the number of particles of the gas are constant

Front 31

Boyle's Law

Back 31

The inverse variation of the volume of a gas with it's pressure if the temperature and the number of particles are constant

Front 32

Phase Change

Back 32

A reversible physical change that occurs when a substance changes from one to state of matter to another

Front 33

Heat of Fusion

Back 33

The energy a substance must absorb in order to change from solid to a liquid

Front 34

Vaporization

Back 34

The phase change in which a substance changes from a liquid into a gas

Front 35

Evaporation

Back 35

The process that changes a substance from a liquid to a gas at temperatures below the substance's boiling point

Front 36

Condensation

Back 36

The phase change in which a substance changes from a gas or vapor to a liquid

Front 37

Deposition

Back 37

The phase in which a gas or vapor changes directly into a solid without first changing into a liquid ; the placement of sediment that has been transported from another location

Front 38

Endothermic

Back 38

A description of a change in which a system absorbs energy from its surroundings

Front 39

Exothermic

Back 39

A description of a change in which a system releases energy to its surroundings

Front 40

Heat of Vaporization

Back 40

The energy a substance must absorb in order to change from a liquid to a gas

Front 41

Vapor Pressure

Back 41

The pressure caused by the collisions of particles in a vapor with the walls of a container

Front 42

Sublimation

Back 42

The phase change in which a substance changes from a solid into a gas or vapor without changing to a liquid first