Afoqt: Physical Sciences

Front 1

Absolute Zero

Back 1

The lowest possible temperature (-273.15° C)

Front 2

Atmospheric Pressure

Back 2

The pressure exerted by the gases in the air.

Units of measurement are: kilopascals (kPa), atmospheres (atm), millimeters of mercury (mm Hg), and Torr

Standard atmospheric pressure is: 100 kPa, 1 atm, 760 mm Hg, and 760 Torr.

Front 3

Atom

Back 3

The smallest particle of an element; a nucleus and its surrounding electrons.

Front 4

Atomic Mass

Back 4

The mass of an atom measured in atomic mass units (amu).

Atomic mass is now more generally used instead of atomic weight.

Front 5

Atomic Number

Back 5

Awesome known as proton number, it if the number of electrons or the number of protons in an atom.

Front 6

Atomic Weight

Back 6

A common term used to mean the average molar mass of an element. This is the mass per mole of atoms.

Front 7

Boiling Point

Back 7

The temperature at which a substance undergoes a phase change from a liquid to a gas.

Front 8

Celsius Scale (C°)

Back 8

A temperature scale on which the freezing point of water is at 0ﾟ and the normal boiling point at standard atmosphere pressure is 100°.

Front 9

Change of State

Back 9

A change between two of the 3 states of matter: solid, liquid and gas.

Front 10

Compound

Back 10

A chemical consisting of two or more elements chemically bonded together.

Front 11

Condensation

Back 11

The formation of a liquid from a gas. This is a change of state, also called a phase change.

Front 12

Conduction

Back 12

1. The exchange of heat (heat conduction) by contact with another object

2. Allowing the fow of electrons (electrical conduction)

Front 13

Convection

Back 13

The exchange of heat energy with the surroundings produced by the flow of a fluid due to being heated or cooled.

Front 14

Decay (Radioactive Decay)

Back 14

The way that a radioactive element changes into another element due to loss of mass through radiation.

Front 15

Density

Back 15

The mass per unit volume

Front 16

Diffusion

Back 16

The slow mixing of one substance with another until the 2 substances are evenly mixed. Mixing occurs because of differences in concentration within the mixture. Diffusion works rapidly with gasses, very slowly with liquids.