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Direct linkHesser, Kathi; Buck, Gayle; Dopp, Sandra – Science Scope, 2005
In the activity described in this article, students will explore how variables in a first-class lever, specifically arm length, position of the fulcrum, and placement of the load, affect the effort needed to lift the load. To begin the lesson, demonstrate to the class how a first-class lever works and review what is meant by the terms fulcrum,…
Descriptors: Demonstrations (Educational), Science Instruction, Spectroscopy, Inquiry
Peer reviewedMascazine, John R. – Science Scope, 2001
Presents three biographical sketches of scientists including John Wesley Powell (first to explore the geology of the Grand Canyon), Joseph von Fraunhofer (his work in optics led to the science of spectroscopy), and Gregor Mendel (of Mendelian genetics fame). Other scientists are mentioned along with sources for additional biographical information.…
Descriptors: Biographies, Genetics, Geology, Middle Schools
