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 spaced ...

WASHINGTON ― The U.S. can reap important benefits from fundamental research in high energy density science by renewing investment in its flagship facilities; improving workforce climate with ...

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 ...