Jan Davagian

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Reaching for a Star... (and finding its diameter!) part of Earth and Space Science:Summer 2011:Activities
In this activity, students review standard metric units of measurement and practice using basic science classroom instruments. To help students relate to these units, they create their own list of approximate representations for selected units of measurement using familiar classroom objects. Students learn that extreme distances can be measured by using the ratios of similar triangles. Triangles are generated by shadows cast by the tree and another, easily measured item. Finally, students are given a challenge to develop a method to approximate the measurement of the diameter of the sun using mathematical ratios. [image right border]