What is density and why does it matter?
Brittney Spears – oh wait, that’s an EXAMPLE of density! Density is how much mass something has compared to the space it takes up. Ex : you can have a balloon filled with helium be the (general) about 2 square feet in size, but since Helium has a low # on the table of elements, it’s MASS is very small. Youprobably have more mass in a cube of chicken bouilllion than you do in all that helium. Mass doesn’t equal space taken or size. Things float, in air or water (or move thru space), at different levels based on their mass versus volume. Ex: Remember zeppelins? They were huge because they needed lots of helium in order to lift that small passenger compartment underneath. Here’s a bit of history & comedy and education wrapped up in 1 story. The ancient Greek scientist Archimedes went to take a bath and observed that, from the rise of the water upon entering that he could calculate the volume of something through the displacement of the water. Allegedly, upon this discovery, Archimedes wen
