## Tuesday, November 21, 2017

### Density

We have made sure that everyone had a good handle on density in regards to definition, math and formulas, and what it actually means.

Density measures matter in a given volume or the amount of stuff in a space. It can also refer to the amount of space between molecules. We looked at some diagrams and discussed scientifically why a person cannot walk through walls, why moving through air is easy, and why moving through water is slightly more difficult.

Density is how close together the particles are in a substance. If they are close together the substance is more dense. If the particles are far apart, the substance is less dense. I do not float in Lake Anna, but I do float in the ocean - therefore I am more dense than Lake Anna and less dense than the ocean.

Things that are more dense-sink, things that are less dense-rise to the top, things with similar densities-mix. If you were to pour liquids in a random order layers form because of the differences in density. Here is a photo of a demo.