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| Question | Answer |
|---|---|
| A numerical scale used to rate the intensity of and potential damages caused by a hurricane; 1 is the lowest intensity, and 5 is the highest intensity. | Saffir-Simpson |
| An electrostatic discharge in the atmosphere that occurs when negatively and positively charged particles become separated within a cloud; the discharge can take place between different parts of the cloud or between the cloud and the ground. | Lightning |
| A thunderstorm with the potential to produce hail with diameters of 2.5 cm (1 in) or larger, winds that exceed 50 knots (92 km/h, or 56 mph), or a tornado. | Thunderstorm |
| A large, comma-shaped low-pressure system that forms along the polar-front jet stream between about 30° and 60° latitude and produces many types of weather, some of which are hazardous; these systems are also known as extratropical cyclones. | Mid-latitude cyclone |
| The upper part of a large cumulonimbus cloud that spreads laterally at the tropopause to form a broad, flat top. | anvil cloud |
| A process that causes air near the ground surface to rise to higher elevation. Examples include the ascent of air at a frontal boundary, air flow over mountains, and convergent winds near Earth's surface. | lifting mechanism |
| A thunderstorm that does not rotate, meaning that it does not contain a mesocyclone. | ordinary mechanism |
| A rotating thunderstorm; such storms often become severe and can produce hail, strong straight-line winds, and tornadoes. | Supercell thunderstorm |
| A scale for classifying the intensity of a tornado based on the damage it causes, using correlations of observed damage with wind velocities. | Enhanced Fujita (EF) |
| A nearly vertical, funnel-shaped cloud, in which air rotates violently around the axis of the funnel; they commonly form in association with supercell thunderstorms and can cause extreme damage. | tornado |
| The condition in the atmosphere in which a parcel of air, after undergoing initial lifting, can remain buoyant and continue to rise. | atmospheric instability |
| A strong tropical cyclone over the North Atlantic or eastern Pacific Ocean in which sustained wind speeds reach 119 km/h (74 mph) or higher. | Hurricane |
| Noise caused by lightning's release of heat energy, which sends shock waves through the atmosphere. | squall line thunderstorms |