HAIL
- round, small pieces of ice that sometimes fall during a
thunder storm, frozen raindrops
HAZE
- thin mist or water vapor in the air
HEAT
- a form of energy produced by movement of molecules, usually
associated sunlight
HELIUM
- a simple chemical element, a very light gas, lighter than air,
with no color or smell
HIGH PRESSURE
- having a pressure exceeding that of the atmosphere
HOT AIR
- air, whose molecules are moving fast
HUMIDITY
- the amount of moisture in the air
HYDROELECTRIC
- having to do with the production of electricity by water power
HYDROGEN
- a colorless, odorless, tasteless, gaseous element, the
lightest substances known, combining with oxygen to form water
HYDROGEN
PEROXIDE
- a liquid used to clean cuts, make up of hydrogen and oxygen
HYDROLOGIC
CYCLE
- process involving the circulation and distribution of
freshwater on the earth
HYGROMETER
- an instrument for measuring the amount of water vapor in the
air
