Ward's World Activity Guides

Ward's World Crushing Can Activity

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Page 1 Crushing Can Recommended Grade Level(s): Appropriate for: Middle school and High school Time Requirements: Activity Time: 25 minutes Teaching Topics & Concepts: • To illustrate the presence of atmospheric pressure. • Pressure & Gas Volume Relationship • Relationship between gas pressure and temperature. • State change • Kinetic molecular theory Background: Understanding how gases behave in real life helps students connect to scientific principles. Everybody has a general idea of what a gas is, especially the oxygen and nitrogen mixture we breathe in every day. Or the 14.7 pounds of pressure the atmosphere exerts on every square inch of our bodies. But how do gases behave when you change the temperature, pressure, or volume? For every action, there is an equal and opposite reaction (Newton's Third Law). Pressure is the measure of how much pushing force something is putting on another object. In a gas, this is usually the gas pushing on the object's container or, if the gas is heavy, something inside the gas. Newton's third law helps explain the changes in the gas pressure when we put force on the object containing it. These concepts help us understand why our ears pop going up in an elevator or on an airplane or changes that happen underwater for scuba divers? By observing a spectacular demonstration of atmospheric pressure crushing a can in your science lab, students can see these principles in action. + ward ' s science Safety • When working with the Bunsen burner or boiling water – Adult supervision is required. – Wear safety glasses, gloves, and a lab coat. !

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