Matter is physically present stuff. It is tangible and takes up space. Your iPod is made up of matter, as are lions, tigers, and bears (oh my!). Even tiny things like protons, neutrons, atoms, and...

As we've already said, matter is anything that has mass and occupies space. We're not just talking about the moon and stars, either. We mean the sort of space that takes up volume. Matter can exist...

Everything's A Changin'We've already discussed what the three major phases of matter are: solids, liquids, and gases. Most substances can exist in all three phases depending on the temperature and...

What's the Matter?1. A glass of pure water is classified as: (This is tricky!)a) a heterogeneous solutionb) a homogeneous solutionc) an elementd) a compounde) an ionic solution2. Mixtures are divi...