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D - Science - Unit 7
Unit 7 Vocab - Part 2
| Question | Answer |
|---|---|
| Prevailing Westerlies | the major wind belts over united states that push air masses west to east |
| Jet Streams | bands of high- speed winds 10 kilometers above earth's surface and push air masses west to east |
| Front | the boundary where unlike air masses meet but do not mix |
| Cold Front | when a rapidly moving cold air mass runs into a slowly moving warm air mass and the cold air mass slides under |
| Warm Front | when a fast-moving air mass overtakes a slowly moving cold air mass |
| Stationary Front | when a cold and warm air masses meet but neither one can move each other |
| Occluded Front | when a warm air mass is caught between two cold air masses |
| Cyclones | a swirling center of low air pressure |
| Anticyclones | high pressure centers of dry air |
| Storm | a violent disturbance in the atmosphere |
| Rain | Drops of water that are at least 0.5 millimeter in diameter |
| Hail | Round pellets of ice larger than 5 millimeters in diameter |
| Snowflake | The ice crystals that are created from converted water vapor in a cloud |
| Sleet | Ice particles smaller than 5 millimeters in diameter |
| Circocumulus Clouds | Clouds that look like rows of cotton balls and often indicate that a storm is on the way |
| Nimbostratus Clouds | Clouds that happen when stratus clouds thicken, and produce drizzle, rain, or snow |
| Altocumulus & Altostratus Clouds | "middle-level" clouds that are higher than regular cumulus and stratus clouds, but lower than cirrus and other "high" clouds |
| Fog | Clouds that form at or near the ground; often form when the ground cools at night after a warm, humid day |
| Thunderstorm | a small storm often accompanied by heavy precipitation and frequent thunder and lightning |
| Lightning | a sudden spark, or electric discharge, as these charges jump between parts of a cloud, between nearby clouds or between a cloud and the ground |
| Thunderheads | thunderstorms that form in cumulonimbus clouds |
| Storm | a violent disturbance in the atmosphere |
| Tornado | a rapidly whirling, funnel-shaped cloud that reaches down from a storm cloud to touch Earth's surface |
| Hurricane | a tropical cyclone that has winds 195 kilometers per hour or higher |
| Storm Surge | a "dome" of water that sweeps across the coast where the hurricane lands |
Created by:
lprinke
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