Weather Patterns Part 2 Objectives Identify the weather

Weather Patterns Part 2

Objectives • Identify the weather factors and instruments. • Identify air masses and fronts. • Contrast hurricanes and tornadoes.

Weather Patterns • Air pressure is the weight of air as it presses down. • Cool, sinking air has high air pressure so it moves under the warm air and is felt as wind.

Weather Instruments • The following table represents the different weather factors as well as the weather instrument used to measure each factor. Weather factor Temperature Wind Precipitation Air pressure Anemometer Barometer Weather instrument Thermometer Anemometer Rain gauge Barometer Rain Gauge Thermometer

Weather Patterns • Earth’s surface heats unevenly causing air masses to form. • An air mass is a large body of air that has about the same temperature, air pressure, and water vapor. It can be either warm or cold, dry or moist. • A front is the place where two air masses meet. • A front gets its name from the kind of air that is moving into the area. Cold front Warm front Stationary front Brings colder air into an Brings warmer air into an Moves back and forth over area the same area.

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Weather Patterns • Thunderstorms, hurricanes, and tornadoes are types of severe weather. • Differences between tornadoes and hurricanes Tornadoes 1. Occur on land 2. Winds are fast 3. Last for a few minutes 4. Less destructive than hurricanes Hurricanes 1. Occur in the ocean 2. Winds are slow 3. Last for days 4. More destructive than tornadoes https: //www. youtube. com/watch? v=W 0 Lsk. Be_Qf. A