Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

But what does that mean? The simple answer is how heavy something is for its size. If something seems very heavy for its size (like a heavy metal object), we say it is more dense. If something seems ...

Add Yahoo as a preferred source to see more of our stories on Google. Did you know this Tuesday is Mini-Golf Day? It's random, I know, but let's have some fun with it! Here's our friend Delia Navarro ...

Planners and anti-suburb activists tend to promote density as a cure-all for America's urban centers, including Portland's. But here's some pushback from the blog "Newgeography," by Rick Harrison, ...