This lab is designed to introduce students to the topic of Scientific Inquiry. Students predict how many drops of water will fit on a penny. I walk around the room to make sure everybody is doing the exact same thing because the one variable that is different is the year of the penny. Everything else should be the same! It's simple but the students love this lab. This activity supports Grade Seven California State Science Standard 7 - Scientific progress is made by asking meaningful questions and conducting careful investigations.