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Weather Unit Vocab
| Term | Definition |
|---|---|
| Latitude | geographic coordinate that specifies the north or south of the Equator |
| Longitude | distance measured in degrees east or west from an imaginary line that goes from the North Pole to the South Pole and that passes through Greenwich, England |
| Hemisphere | a half of the earth, usually divided into northern and southern halves by the equator, or into western and eastern halves by an imaginary line passing through the poles |
| Atmosphere | the envelope of gasses surrounding the earth |
| Weather | the state of the atmosphere at a place and time as regards heat, dryness, sunshine, wind, and precipitation |
| Climate | the average weather conditions in an area over a long period |
| Polar | relating to the North or South Pole |
| Continental | forming or belonging to a continent. |
| Maritime | connected with the sea, especially in relation to seafaring commercial or military activity |
| Rain | moisture condensed from the atmosphere that falls visibly in separate drops. |
| Freezing Rain | rain that freezes on impact with the ground or solid objects. |
| Sleet | a form of precipitation consisting of ice pellets, often mixed with rain or snow. |
| Snow | atmospheric water vapor frozen into ice crystals and falling in light white flakes or lying on the ground as a white layer. |
| Hail | when chunks of ice fall from the sky |
| Rain Gauge | a device for collecting and measuring the amount of rain which falls. |
| Wind | the perceptible natural movement of the air, especially in the form of a current of air blowing from a particular direction. |
| Anemometer | an instrument for measuring the speed of the wind, or of any current of gas. |
| Wind Vane | A wind vane is mounted on a shaft or spire that is elevated off the ground. |
| Coriolis Effect | an effect whereby a mass moving in a rotating system experiences a force (the Coriolis force ) acting perpendicular to the direction of motion and to the axis of rotation |
| Trade Winds | a wind blowing steadily towards the equator from the northeast in the northern hemisphere or the southeast in the southern hemisphere, especially at sea |
| Prevailing Westerlies | prevailing winds from the west toward the east in the middle latitudes between 30 and 60 degrees latitude |
| Polar Easterlies | dry and cold prevailing winds that blow from the east |
| Air Pressure | the weight of their air pushing on everything around it |
| Barometer | a weather instrument that measures air pressure |
| Low Pressure | a mass of warm rising air |
| High Pressure | a mass of cool dry air |
| Occluded Front | forms when a warm air mass gets caught between two cold air masses |
| Stationary Front | warm air is present behind it (to its south) with cool air ahead of it (to its north) |
| Jet Stream | bands of strong wind that generally blow from west to east all across the globe |
| Gulf Stream | a warm and swift Atlantic Ocean current that follows the eastern coastline of the US and Canada before crossing the Atlantic Ocean towards Europe |
| El Nino | a warming of the ocean surface, or above-average sea surface temperatures, in the central and eastern tropical Pacific Ocean |
| La Nina | the periodic cooling of ocean surface temperatures in the central and east-central equatorial Pacific |
| Map | a representation usually on a flat surface of the whole or a part of an area |
| Globe | the earth. |
Created by:
Nrathi
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