| A | B |
|---|
| Atmosphere | The outer layer of gasses of a large body in space, such as a planet or a star; the mixture of gases that surrounds the solid Earth; one of the four parts of the Earth system. |
| Cycle | A series of events or actions that repeat themselves regularly; a physical and/or chemical process in which one material continually changes locations and/or forms. |
| Altitude | the distance above sea level |
| Density | A measure of the amount of matter packed into a unit volume; the --- of an object is equal to its mass divided by its volume |
| Radiation | Energy that travels across distances as certain types of waves. |
| Conduction | the transfer of heat energy from one substance to another through direct contact without obvious motion. |
| Convection | the transfer of energy from place to place by the motion of heated gas or liquid ; in earth’s mantle, convection is thought to transfer energy by the motion of solid rock, which when under great heat and pressure can move like a liquid. |
| Ultraviolet radiation | radiation of higher frequencies than visible light which can cause sunburn |
| Infrared radiation | radiation of lower frequencies than visible light |
| Ozone | a gas that consists of three oxygen atoms |
| Greenhouse effect | the process by which certain gases in a planet’s atmosphere absorbs and emits infrared radiation, resulting in an increase in surface temperature |
| Greenhouse gas | gases, such as carbon dioxide and methane, that absorb and give off infrared radiation as part of the greenhouse effect |
| Smog | Combination of smoke and fog |
| Ozone | gas made of 3 oxygen atoms |
| Particulates | small particles or droplets of dirt, dust, pollen etc in the air |
| Pollution | harmful substances in the atmosphere that may cause damage or affect health |
| Greenhouse effect | Process where certain types of radiation are absorbed/emitted by certain gasses in the atmosphere causing a rise in surface temperature |
| Greenhouse gasses | certain gasses like carbon dioxide and methane in the atmosphere that absorb and emit radiation |
