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Unit 7 Lesson 1 What Is Weather? Copyright © Houghton Mifflin Harcourt Publishing Company Unit 7 Lesson 1 What Is Weather? Weather Watch • Look outside. Is the sun out? Is the air warm or cool? • Are there any clouds? Do you feel any wind? • Wind is air that moves. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 7 Lesson 1 What Is Weather? Weather Watch • Weather is what the air outside is like. • Weather may change during the day. • It may also change from day to day and from month to month. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 7 Lesson 1 What Is Weather? Measure It! • You can use tools to measure weather. • Temperature is the measure of how hot or cold something is. • A thermometer is a tool that measures temperature. Temperature is measured in degrees. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 7 Lesson 1 What Is Weather? Measure It! • Rain, snow, sleet, and hail are forms of water that fall from the sky. • A rain gauge is a tool that measures how much water falls. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 7 Lesson 1 What Is Weather? Measure It! • How can these tools help you know what the weather is outside? Copyright © Houghton Mifflin Harcourt Publishing Company Unit 7 Lesson 1 What Is Weather? Predict It! • Scientists observe and track weather over time. • They look for changes in weather. • They use tools to learn what the weather may be. • Some scientists use weather satellites and weather balloons to help them track weather. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 7 Lesson 1 What Is Weather? Predict It! • Scientists use what they learn to make a weather report. • A weather report helps people get ready for the coming weather. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 7 Lesson 1 What Is Weather? Predict It! • How might this weather report affect what you may do or what you may wear? Copyright © Houghton Mifflin Harcourt Publishing Company