Therm

Heat

Hydr

Water

Hygr

Moisture

Bar

Weight; Pressure

Phot, Phos

Light

Pyr

Fire

Aer

Lower Air

Ether

Upper Air

Caust, Caut

Burn

Schiz, Schis

Cleave

Od

Way; Path

Pseudo-

False; Counterfeit

-phoria, -phery

a bearing; a carrying; production

that which bears

-phore, -phorus

carries, produces

bearing; produces

Isotherm

A curve on a diagram joining points representing states or conditions of equal temperature.

Hydrophobia

The irrational fear of water

Hygrometer

An instrument for measuring the humidity of the air or a gas.

Isobar

A curve or formula representing a physical system at constant pressure

Phosphorus

The chemical element of atomic number 15

Pyromaniac

Aeronuatics

The science or practice of travel through the air.

Ethereal

delicate or refined; heavenly or celestial

Caustic

Able to burn or corrode organic tissue by chemical action

Schism

A split or division between strongly opposed sections or parties, caused by differences in opinion or belief.

Exodus

A mass departure of people

Pseudonym

A fictitious name

Pyrotechnical

of or relating to the craft of making fireworks

Photograph

A picture made using a camera

Holocaust

Destruction or slaughter on a mass scale