Building an Electromagnet part of MnSTEP Teaching Activity Collection:MnSTEP Activity Mini-collection
Students will demonstrate how an electric current can make an iron object magnetic by building an electromagnet with a steel nail, insulated wire, a simple switch, a battery/cell, and small metal washers. Students predict the number of washers they can gather on the electromagnet and develop other possible ways to increase or decrease the strength of the electromagnet.
Sinking and Floating Water part of MnSTEP Teaching Activity Collection:MnSTEP Activity Mini-collection
Students will become familiar with the concept of density in relationship to objects sinking and floating. Once an understanding is built that objects that are less dense than water will float and things that are denser will sink, they will make predictions and observe what happens when colored hot water is placed into room temperature water. A similar procedure will be done by placing colored cold water into room temperature water. They should observe that the less dense warm water will rise and the denser cold water will sink.