Solidification+and+Melting+(Ibarra)

=Solidification and Melting=
 * **Solidification-is when a liquid changes into a solid.**
 * **Melting-is when a solid changes into a liquid.**

Liquid to a Solid

 * A liquid has the shape of the container it's in, free surface, and fixed volume. Also the atoms in a liquid are more free then those in a solid. For solidification to occur, scientists use something called a freezing point to measure when a liquid turns into a solid. There are physical effects that can change the freezing point. Pressure is one of those effects. When the pressure surrounding a substance goes up, the freezing point also goes up. That means it's easier to freeze the substance at higher pressures. When it gets colder, most solids shrink in size. There are a few which expand but most shrink.**

**Solid to a Liquid**

 * A solid holds the shape and a fixed volume. Atoms in a solid are tightly packed together then those in a liquid. For melting to occur, think of an ice cube that you have left sitting on the counter, the ice cube will eventually melt, but for that to happen it needs some energy. Atoms in a liquid have more energy then the atoms in a solid. The easiest energy around will probably be heat. Theirs a temperature for every substance called the melting point. When a solid reaches the temperature of its melting point it can become a liquid. As for water the temperature has to be a little over zero degrees Celsius.**

**My Resources**

 * "Changing States of Matter." //Chem4kids.com: Matter: Changing States//. Andrew Rader Studios, Web. 12 Feb. 2011. .**