Unit 8b Science Vocab

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weather

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Psychology

Abnormal Psychology

11th

science weather vocab

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27 Terms

weather

the short term state of the atmosphere at any given time or place

global wind

the movement of air over Earth's surface in patterns that are worldwide (westerlies, polar easterlies, etc.)

Jet Stream

a narrow band of strong, fast moving winds in the upper troposphere, west to east

ocean current

movement of ocean water that follows a regular pattern

El Nino

periodic change of warmer than usual ocean water across the Pacific Ocean

La Nina

periodic change where below average ocean temperatures occur in the Eastern Pacific

Westerlies

blow between 30 and 60 degrees latitude that curve to the east and bring warm air to the middle latitudes

Polar Easterlies

blow between 60 degrees latitude and the poles that curve to the west and move cold, dry air from the poles to the middle latitudes

Trade Winds

blow between the equator and 30 degrees latitude that curve to the west and steer tropical storms east to west across the Atlantic and Pacific oceans

Surface Currents

currents near the surface that are manipulated by the winds in the atmosphere and moves water of different temperatures to different latitudes

Weather forecasting

analysis of scientific data to predict future weather conditions

Meteorology

study of weather and the Earth's atmosphere

Station model

set of meteorology symbols that represent the weather at a particular observing station

Isobars

lines on a weather map that are closed loops and connect areas of equal air pressures

Millibars

marked units for isobars on a weather map

Cold Front

fast moving, cold air mass that collides with a warm air mass pushing the warm air up (clouds, thunderstorms, and storms)

Warm Front

slow moving, warm air mass that collides with a slow moving cold air mass. warm air moves over the cold air mass and causes clouds to form (rain showers and fog)

Weather Front

boundary separating 2 masses of air of different densities. the air masses collide and do not mix

Occluded Front

warm air mass that is trapped between 2 cold air masses and the cold air, forces the warm air up creating clouds (cold temperatures, rain, snow)

Stationary Front

a warm air mass and a cold air mass meet and neither have the energy to move the other out (clouds form precipitation for many days)

Clouds

warm air rises and condenses on particles of dust and smoke in the atmosphere

Precipitation

rain, snow, sleet, and hail

Dew Point

temperature at which the air becomes saturated

Relative Humidity

amount of moisture in the air compared to the maximum moisture that air could hold at a given temperature

Barometer

tool that measures air pressure

Anemometer

tool that measures wind speed

Sling Psychrometer

tool that measures relative humidity