The dots above (representing molecules) show one reason why one material has more or less density than another. Can you see how the molecules of the densest material, water, are more closely ...

If you’re looking for a fun way to explore the physical properties of density with your elementary-aged kids, this experiment is for you!

Content knowledge and pedagogical practices are of particular concern to middle school science instructors teaching density. First introduced in elementary grades with the ideas of floating and ...