what does xhtml stand for?
extensible hypertext markup language

who created the world wide web?
tim berners-lee

what does http stand for?
hyper text tranfer protocol

describe what a protocol is?
a protocol is a set of rules

define css and describe what it allows wed designers to do?
cascading style sheets.

what are elements?
elements are labels that are used to identify and structure parts of a web page

what are tags?
an element is an xhtml document and it has opening and closng tags

list 5 rules
all tags must be lower case
all tags must be closed
all elements must be correctly nested
all attribute values must be withing quotes
doctype must be declared