Students observe changes in a penny when it is cleaned. In this scientific inquiry lesson, students use a dixie cup filled with vinegar and salt, and drop the penny into the water. Students observe the changes.

Science Bob presents instructions for a science demonstration of how to clean pennies with vinegar using common supplies with information on how it works.

During this lab students will experiment to see whether a salt and vinegar solution can clean a tarnished penny. Included on site is lesson plan and student worksheet.