Chemistry+reactions

=/=  ///// =Chemical Reactions=
 * Does density make a difference in how a reaction occurs?**
 * 1299133035~**
 * The triangle is not Greek for change. It's a Greek letter, which scientists use to represent the word change. It's called delta and makes the sound "d" in Greek.**
 * Change in Greek is αλλαγή. **

="Chemical Reactions"= "Let's start with the idea of a reaction. In chemistry, a **reaction** happens when two or more [|molecules] **interact** and something happens. That's it. What molecules are they? How do they interact? What happens? Those are all the possibilities in reactions. The possibilities are infinite. There are a few key points you should know about chemical reactions. " Chem4kids.com

="Physical Reactions"= Physical Reactions are the opposite of a Chemical Reaction. In a Physical Reaction the form of it may change, but the molecules do not. Some examples of a Physical Reactions are, break, freeze, melt,boil,condense,and sublime. So if you took a peice of paper and ripped it in half, that would be a Physical Reaction. Another cool one is when a smoothie is made. That is true becasue, when you blend something, you are only changing the apperance, not the molecules. Therefore it is a Physical Reaction.

Molecular movement across states of matter: By: Franni Day
 * I think this person meant chemical change versus physical change? What do you think?**
 * I think this person meant chemical change versus physical change? What do you think?**
 * Diagram: || [[image:atoms_of_gas.jpg width="254" height="266"]] || [[image:liquid.jpg width="235" height="278"]] || [[image:solids.jpg width="274" height="288"]] ||
 * Shape and volume || No definite shape and no definite volume. || They have a definite volume but not a definite shape. || they have a definite shpe and a definite volume. ||
 * The distance between particles || The particles are far apart. || They are closer together. || They are stuck together. ||
 * The movement of particles || Rapid. || Medium. || The particles can only move by vibrating next to each other. Slow. ||
 * The forces between the particles || There are few or little forces between the particles. || Medium forces. || Strong forces. ||

*A plasma is more energetic than a gas!* *Hot water has more movement than cold water* *Tempature (in some objects, not all) determains how much motion it has* -Mia Harris