by Amy Brown Science
7th - 12th Grade
Graphing and interpolation are very important science process skills that are essential for any science class. Once a graph has been constructed using established data points, interpolation can be used to determine the answers to new and different questions not determined by lab experimentation. This is an activity that can be used to teach basic graphing skills as well as the use of basic pieces of lab equipment - the ruler and the balance.
In this activity, students will be using samples of ordinary poster board with uniform thickness to determine the area. Since the thickness is constant, students can measure the mass and area of rectangular poster board samples and graph the data to find a relationship between mass and area (mass/area). Using the graph, students will then be able to find the unknown area of an irregularly shaped sample of poster board.
Materials needed: Laboratory Balance, 4 samples of poster board of regular shape, 1 irregular sample, graph paper, ruler, pencil.
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