| A | B |
| troposphere | layer closest to the surface of the Earth |
| weather | occurs in the troposphere |
| 75% | the percentage of atmosphere found in the troposphere |
| thinnest layer of the atmosphere | layer underneath the stratosphere |
| stratosphere | layer above the troposphere |
| 3 | layers whose temperature is decreasing |
| 2 | layers whose temperature is increasing |
| ultra-violet energy | e/m radiation blocked by the ozone layer |
| ozone layer | found in the stratosphere |
| sun burns/skin cancer | caused by overexposure of UV radiation |
| mesosphere | above stratosphere |
| middle | what meso- means |
| heat | what thermo- means |
| ionosphere | found in the thermosphere |
| AM radio transmissions | form of e/m radiation effected by the ionosphere |
| thickest layer of the atmosphere | thermosphere |
| outside | what exo- means |
| outermost layer of the atmosphere | exosphere |
| boundry between outer space and the Earth's atmosphere | layer above the thermosphere |
| middle layer of the atmosphere | layer below the thermosphere |