Fifth graders use dirty pennies to observe physical change. They perform a simple experiment using sodium chloride and acetic acid to see how they affect the shinyness of pennies.
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Fighting Corrosion to Save an Ancient Greek Bronze
Study corrosion on bronze statues with a hands-on lesson. As pupils place a penny in water with salt, they observe the changes in the penny throughout a period of a week. They then analyze the pre-conservation and the post-conservation...
3rd - 8th Science