It is tempting to think that some materials are always heavier than other materials. For example, someone might say that metal is heavier than air. But it depends on how much of each material there is ...

GRAND RAPIDS — What is density? Why is it important to us? In a previous experiment we learned about buoyancy with an orange sinking or floating and now we are going to learn about density with an egg ...

Introduction Have you ever wondered how a ship made of steel can float? If you drop a steel bolt into a bucket of water, the bolt quickly sinks to the bottom. Then how can a steel ship float? And ...