Density describes how closely packed the particles are in a solid, liquid or gas. in a solid ‐ particles are tightly packed in a regular structure in a liquid ‐ particles are tightly packed but free ...

The following Teaching and Learning Highlight was submitted by Amy Berdos, Assistant Superintendent of Schools. Students at the Ahern Middle School most likely will not forget how to calculate density ...

A histogram is drawn like a bar chart, but often has bars of unequal width. It is the area of the bar that tells us the frequency in a histogram, not its height. Key fact Instead of plotting frequency ...