Show your class how combining two objects can create a new object in this hands-on science lesson. Students will learn why breaking apart an object doesn't change its mass.

Show your students the parts that work together to make a person breath! Have them compare the lungs of a healthy person, the lungs of a smoker, the lungs of a city resident, and the lungs of a miner.

Teach your students about different types of rocks and how they're formed, using objects that your class is familiar with.