Physical Science

Front 1

Chemical Property

Back 1

any characteristic of a substance that indicated whether it can undergo a certain change.

Front 2

Chemical Change

Back 2

change of one substance into a new one.

Front 3

Law of Conservation of Mass

Back 3

Mass of all substances that are present before a chemical change equals the mass of all the substances that are remaining after the change.

Front 4

Melting Point

Back 4

Temperature at which a solid begins to liquify.

Front 5

Heat of Fusion

Back 5

amount of energy required to change a substance from the solid phase to the liquid phase.

Front 6

Heat of Vaporization

Back 6

amount of energy required for liquid particles to escape the attractive forces within the liquid or energy required to change from a liquid to gas.

Front 7

Boiling Point

Back 7

temperature at which the pressure of the atmosphere is equal to the pressure of a liquid's vapor and gas molecules can escape the attract, force between molecules.

Front 8

diffusion

Back 8

spreading of particles throughout a given volume that are uniformly distruibuted.

Front 9

Thermal Expansion

Back 9

increase in the size of a substance that results from the separation of its molecules when the temperature is increased.

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Substance

Back 10

element or compound that can't be broken down into simpler components and maintain the properties of the origional substance.

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element

Back 11

substance with atoms that are all alike.

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Compound

Back 12

substance formed from 2 or more elements in which the exact combination and proportion of elements is always the same.

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Heterogeneous mixture

Back 13

misture in which difference materials are unevenly distributed and are easilt identified.

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homogeneous mixture

Back 14

solid, liquid, or gas that contains 2 or more substances blended evenly throughout.

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Solution

Back 15

mix that appears to have the same composition, color, density, and taste throughout and is mixed at the atomic or colecular level.

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colliod

Back 16

hetergeneous mix whose particles never settle.

Front 17

tyndall effect

Back 17

scattering of a light beam as it passes through a colliod.

Front 18

Suspension

Back 18

heterogeneous mix containing a liquid in which visible particles settle.

Front 19

Physical property

Back 19

any characteristic of a material that you can observe or attempt to without changing the idenity of the material.

Front 20

Physical change

Back 20

any change in size, shape, or state, of matter in which the idenity of the substance remains the same.

Front 21

plasma

Back 21

high temperature gas with an overall neutral charge that is the most common state of matter in the universe.

Front 22

viscosity

Back 22

a fluid's resistance to flow.

Front 23

Kinetic theory

Back 23

explanation of the behavior of molecules in matter: states that all matter made of constantly moving particles that collide without loosing energy.