Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? Copyright © Houghton Mifflin Harcourt Publishing Company 1

Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? Florida Benchmarks 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. Copyright © Houghton Mifflin Harcourt Publishing Company 2

Windy Weather Air is made of matter. It has mass and volume. Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? Windy Weather 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. Copyright © Houghton Mifflin Harcourt Publishing Company 3

Windy Weather Wind is moving air. Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? Windy Weather 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. Copyright © Houghton Mifflin Harcourt Publishing Company 4

Local Winds Land heats up more quickly than water does during the day. Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? 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. Copyright © Houghton Mifflin Harcourt Publishing Company 5

Local Winds Land loses heat faster than water at night. Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? 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. Copyright © Houghton Mifflin Harcourt Publishing Company 6

Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? Windy Weather Use the image below to describe how temperature affects air pressure. Copyright © Houghton Mifflin Harcourt Publishing Company 7

Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? Battling Bodies of Air 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. Copyright © Houghton Mifflin Harcourt Publishing Company 8

Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? Battling Bodies of Air 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. Copyright © Houghton Mifflin Harcourt Publishing Company 9

Battling Bodies of Air Describe what is happening in the diagram. Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? Battling Bodies of Air Describe what is happening in the diagram. Copyright © Houghton Mifflin Harcourt Publishing Company 10

Battling Bodies of Air Describe what is happening in the diagram. Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? Battling Bodies of Air Describe what is happening in the diagram. Copyright © Houghton Mifflin Harcourt Publishing Company 11

Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? Mapping the Weather A weather map is a map that uses symbols to show weather data. Different symbols show warm fronts and cold fronts. Copyright © Houghton Mifflin Harcourt Publishing Company 12

Mapping the Weather Describe the weather in three places. Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? Mapping the Weather Describe the weather in three places. Copyright © Houghton Mifflin Harcourt Publishing Company 13

Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? Mapping the Weather 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. Copyright © Houghton Mifflin Harcourt Publishing Company 14

Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? When Disaster Strikes 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. Copyright © Houghton Mifflin Harcourt Publishing Company 15

Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? When Disaster Strikes A blizzard is a strong winter storm with high winds and heavy snowfall. Preparedness plans help people stay safe when disaster strikes. Copyright © Houghton Mifflin Harcourt Publishing Company 16

When Disaster Strikes You should try to be indoors for severe weather. Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather? When Disaster Strikes 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. Copyright © Houghton Mifflin Harcourt Publishing Company 17