cascading-the rules the browser follows when opening the page
embedded style sheets-written in the head tag and only works in the one document
external style-stored as a CSS file which can change many pages at one time
by linking to them directly through the style sheet.
inline-style sheet code put into body of HTML, can be used to overide external style sheet.
selector- is the area to be modified, and tied to a decleration <h1>
declaration- tied to selector (color:green), defines variables
class-allows you to classify different appearence for different tags, such as <h1>, <h2>
redifine HTML- change appearence of content based on a certain tag
a:link-change appearence of links