Science Experiments What does putting pennies in water do? February 5, 2026 by Tanp | Leave a Comment Putting pennies in water is a simple experiment that can demonstrate several scientific principles, such as oxidation, surface tension, and the effects of copper ions on water. While this activity is often used in educational settings, it can also serve as an interesting home experiment to observe chemical reactions and water properties. What Happens When […] Read more ยป