| A | B |
|---|
| anemometer | Instrument measuring wind speed |
| 21% | Amount of oxygen in atmosphere |
| chlorofluorocarbons (CFCs) | Chemicals breaking down ozone |
| Global warming | Gradual increase in earth's atmospheric temperature. |
| Climate | Long term weather conditions in an area. |
| Low air pressure | Warm rising air |
| High air pressure | Cool sinking air |
| Hurricane | Tropical storm with winds greater than 119 km/hr. |
| Tornado | Rapidly whirling, funnel shaped cloud |
| Lightning | Sudden spark or energy discharge from clouds |
| Storms | Violent disturbance in the atmosphere |
| Cyclone | Swirling center of low air pressure |
| Precipitation | Forms of water that falls from clouds and reaches earth's surface. |
| Cirrus | Wispy, feathery clouds |
| Stratus | Flat layered clouds |
| Cumulus | Fluffy round cotton-like clouds |
| Evaporation | Liquid water changes into water vapor. |
| Condensation | Water vapor changes into liquid water. |
| Psychrometer | Two thermometer instrument used to measure relative humidity. |
| Relative humidity | % of water vapor in air compared to the maximum amount the air could hold. |
| Humidity | Amount of Water vapor in the air. |
| Jet stream | High speed winds 10 km above the earth's surface. |
| Coriolis effect | Earth's rotation makes winds curve. |
| Wind chill | Increased cooling by wind removes body heat. |
| Winds | Horizontal movement of air from area of high pressure to an area of lower pressure. |
| Ozone | Oxygen with three atoms |
| Water vapor | Water in the form of a gas. |
| Barometer | Instrument used to measure air pressure. |
