Module 2 Flashcards
Heat Index
Measurement of the combination of temperature and humidity.
Absolute Humidity
The mass of water vapor contained in a certain volume of air.
Relative Humidity
The ratio of the mass of water vapor in the air at a given temperature to the maximum mass of water vapor the air could hold at that temperature, expressed as a percentage.
Humidity
The moisture content of air
Greenhouse Effect
The process by which certain gases(principally water vapor, carbon dioxide, and methane) trap heat that radiates from the earth.
Global Warming
If the concentration of carbon dioxide (and the other greenhouses gases) were to increase too much, the earth would get too warm.
Parts per million
(ppm) The number of molecules (or atoms) of a substance in a mixture for every one million molecules (or atoms) in that mixture.
saturated
When the amount of water vapor in the air reaches the maximum that that air can hold
combustion
A chemical process by which oxygen reacts with a fuel to release energy. The chemical reactions that supply our bodies’ physical energy rely on combustion and therefore rely on oxygen.
conversion formula
example: 1 (first measurement)/1 x 1 (first measurement)/equivalent (second measurement) = Answer (second measurement)
sulphur oxides
refers to the two different gas molecules that are created when sulphur is burned.
ozone
A poisonous gas composed of three oxygen atoms bonded together
nitrogen oxides
gas molecules that are formed when nitrogen is burned. No one actually burns nitrogen on purpose, rather it is unintentionally burned during other processes.
ground level ozone
Normally ozone only exists high in the atmosphere where no one is breathing it. Ground level ozone is used to refer specifically to ozone that is on the ground where we can breathe it in and therefore poses a health threat to humans.
airborne lead
Although lead is a solid it is possible to small amounts to become airborne. In the past there were high levels of lead in the air but today has been almost eliminated.
