| A | B |
|---|
| water vapor | water in a gaseous state |
| air pressure | pressure exerted by the air in a particular area |
| conduction | a type of heat transfer by electrons between objects by direct contact |
| convection | a type of heat transfer from warm to cool areas in a circular flow |
| UV radiation | direct radiation by the sun |
| atmosphere | an envelope of gases surrounding the earth that extends about 1000 Km above the surface |
| exosphere | outermost layer of the atmosphere that extends several thousands Km's above the earth |
| thermosphere | layer of the atmosphere right below the exosphere |
| mesosphere | middle layer that extends from the edge of stratosphere to about 65KM's |
| stratosphere | layer of the atmosphere that contains the ozone layer |
| troposphere | life containing layer of the atmosphere that is closeth to the earth |
| ionosphere | layer of air between the mesosphere & thermosphere where radio waves & light signals are reflected back to earth |
| smog | air pollution caused by use of fossil fuels, factories |
| greenhouse effect | the warming of the atmosphere due to the trapping of heat from the sun by carbon dioxide & other gases |
| ozone | gases that form in thestratosphere protecting the earth from UV radiation |
