Read more about the states of matter in our study guide about temperature changes and energy. In a system, the energy of the particles, which can be atoms or molecules, is known as the internal ...

The state of matter is a deceptively simple concept. It turns out that any material, no matter what it is made of, can exist in one of three forms: solid, liquid or gas. These are categories of ...

Find out more about this state of matter. Science Trek is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV ...

The study of electronic states and spectroscopy of diatomic molecules is a crucial area ... used to measure the interaction of light with matter, providing information about the electronic ...

The little spheres represent water molecules. Molecules are in constant motion. The attractions water molecules have for each other keep them close together. They can move past each other, but their ...

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