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The first lesson, Isotopes of Pennies, introduces the idea of isotopes.

The final lesson, Frosty the Snowman Meets His Demise: An Analogy to Carbon Dating, is based on gathering evidence in the present and extrapolating it to the past.

Betz was recognized for his 44-year career serving the rural community of Othello, Wash.

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Soon, she and the cowboy are attending more speed-dating events at the chocolate shop and she’s seeking his advice on how to deal with his ornery boss.Small changes in our lifestyle can have a rather large impact on energy consumption.To prove this point, Chris goes through the KWH usage in various countries, to illustrate our energy-heavy habits and raise awareness.Ancient Chinese pictographs have been around for thousands of years.Clues in the picture symbols show that the earliest Chinese words must have included basic historical facts from Genesis when the symbols were invented.