unit 3 lesson 4 how do weather patterns help us predict weather? copyright © houghton mifflin...
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
Copyright © Houghton Mifflin Harcourt Publishing Company
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
Florida Benchmarks
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• SC.5.E.7.3 Recognize how air temperature, barometric pressure, humidity, wind speed and direction, and precipitation determine the weather in a particular place and time.
• SC.5.E.7.7 Design a family preparedness plan for natural disasters and identify reasons for having such a plan.
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
Windy Weather
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• Air is made of matter. It has mass and volume.
• Air pressure is the weight of the atmosphere on Earth’s surface.
• The sun does not heat all parts of Earth evenly. This causes changes in air pressure.
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
Windy Weather
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• Wind is moving air.
• Differences in air pressure cause the air to move.
• Wind blows from areas of high pressure to areas of low pressure.
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Local Winds
• Land heats up more quickly than water does during the day.
• A sea breeze forms during the day when warm air over land rises and cool air over water moves inland to replace it.
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
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Local Winds
• Land loses heat faster than water at night.
• A land breeze forms when cool air over land moves out to sea to replace the warm air rising from the water.
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
Windy Weather
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• Use the image below to describe how temperature affects air pressure.
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
Battling Bodies of Air
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• An air mass is a large body of air that has the same temperature and moisture properties throughout.
• An air mass that forms over warm land will be warm and dry.
• An air mass that forms over cold water will be cold and wet.
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
Battling Bodies of Air
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• The boundary where two different air masses meet is called a front.
• A cold front forms where a cold air mass moves under a warm air mass.
• A warm front forms where a warm air mass moves over a cold air mass.
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
Battling Bodies of Air
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• Describe what is happening in the diagram.
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
Battling Bodies of Air
Copyright © Houghton Mifflin Harcourt Publishing Company
• Describe what is happening in the diagram.
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
Mapping the Weather
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• A weather map is a map that uses symbols to show weather data.
• Different symbols show warm fronts and cold fronts.
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
Mapping the Weather
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• Describe the weather in three places.
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
Mapping the Weather
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• Meteorologists get data from weather tools located at weather stations.
• A weather station is a structure that has tools for measuring and recording weather data at a given location.
• Satellites and Doppler weather radar are also used to gather weather data.
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
When Disaster Strikes
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• Tornadoes, hurricanes, and blizzards are types of severe weather.
• A tornado has a funnel shape and can form from violent thunderstorms.
• A hurricane is a strong low-pressure storm that forms over warm water.
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
When Disaster Strikes
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• A blizzard is a strong winter storm with high winds and heavy snowfall.
• Preparedness plans help people stay safe when disaster strikes.
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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?
When Disaster Strikes
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• You should try to be indoors for severe weather.
• Prepare an emergency kit with water, food, and a first-aid kit.
• Listen to the radio for storm warnings.