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

PREPARATION TIME: 5 minutes. LESSON TIME: 15 minutes. TEACHER PREP: Gather materials.

WORDS TO KNOW:

dent expands warm

TEACHER TEXT:

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