| A | B |
|---|
| photosynthesis | process by which plants use energy from sunlight to make sugar |
| water vapor | water in a gaseous state |
| air pressure | pressure exerted by the air in a particular area |
| UV radiation | direct radiation by the sun - harmful to living things |
| thermosphere | the topmost layer of the atmosphere - the highest temperatures occur in this layer |
| stratosphere | layer of the atmosphere that contains the ozone layer |
| troposphere | life containing layer of the atmosphere that is closeth to the earth |
| greenhouse effect | the warming of the atmosphere due to the trapping of heat from the sun by carbon dioxide & other gases |
