SCIENCE CONCEPT: Heat warms the air around the earth, causing changes in atmospheric conditions: temperature, density, and pressure. STUDENT OBJECTIVE: The student will discover that warm air expands. OVERVIEW: The student will use a bottle and warm water to discover that warm air expands. TEACHER TEXT:

PREPARATION TIME: 5 minutes. LESSON TIME: 15 minutes. TEACHER PREP: Gather materials. WORDS TO KNOW: long-necked expands warm

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