SCIENCE CONCEPT: Air is a gas which is a form of matter. Air exerts pressure. STUDENT OBJECTIVE: The student will discover that although it is invisible, air exerts pressure in all directions and the effects can be observed. OVERVIEW: The student will observe air pressure as it holds water in an inverted glass. TEACHER TEXT:

PREPARATION TIME: 5 minutes. LESSON TIME: 10-20 minutes. TEACHER PREP: Gather needed materials. WORDS TO KNOW: air pressure

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