Course Activity_ Identifying a Substance by Its Properties (1).docx

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Task 1 The Composition of Pennies The US penny has undergone many changessince pennies were first made. In this task, you’ll determine one particular change that was made to the penny around 1982. If you’re unfamiliar with balances and scales or graduated cylinders, read Lab Instruments and Measurements before beginning. Estimated time to complete: 1 hour If you’ve purchased an Edmentum lab kit, remove the electronic balance and graduated cylinder from the bag labeled Common Materials. These materials are italicized in the following equipment list. Then gather any additional items shown on the list. If you’re not using an Edmentum lab kit, alternatives have been suggested in parentheses. 5/21/2020 Task: The Composition of Pennies You’ll need these materials: electronic balance, precise to at least 0.1 g (may also use a kitchen scale) graduated cylinder (may also use a 1-teaspoon measure) at least 20 pennies; at least 5 of them dated before 1982,and at least 5 dated after 1982 a narrow, transparent container that can hold water; the narrowerthe better, as long as pennies will fit into it masking tape Part A Separate the pennies you have into two groups: one group with pennies dated before 1982 and the other with pennies dated after 1982. Compare the two groups. Record any similaritiesor differences in size or appearance that you notice between the two groups.

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