by STAO ADMIN | Nov 12, 2019
In this demo, a polyethylene strip is charged by rubbing with wool. The charged strip is then used to charge a neutral object, a pith ball, by contact. This demo can be done as a student activity. This content is only available to...
by STAO ADMIN | Nov 12, 2019
Since the distances to the stars cannot be measured directly, astronomers use a variety of techniques including triangulation and parallax, comparison of absolute and apparent magnitude, and Cepheid variables. Triangulation is an indirect method of measuring the...
by STAO ADMIN | Nov 12, 2019
Cells require a constant supply of glucose and oxygen to produce energy. Cellular respiration occurs in the mitochondria of a cell. As a result of this process, large quantities of waste carbon dioxide must be expelled from the cell. All materials involved in this...
by STAO ADMIN | Nov 12, 2019
This demonstration is an entertaining way to introduce simple chemical reactions and the types of evidence that indicate the occurrence of chemical change, including the production of a gas. A link can be provided to the gas tests conducted in Grade 9 to help focus...
by STAO ADMIN | Nov 12, 2019
This activity can be an engaging way for students to visualize how ionic compounds are formed and where their formulas come from. Although it will take time to create the decks of cards the first time around, they can be reused year after year. This game can be used...
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