Gwidon Bonk
Gwidon Bonk voted up Anonymous' answer

HTML tags are the hidden keywords within a web page that define how the browser must format and display the content. Most tags must have two parts, an opening and a closing part. For example, <html> is the opening tag and </html> is the closing tag. Note that the closing tag has the same text … Read more

Gwidon Bonk
Gwidon Bonk voted up Tom Jackson's answer

I like Quizzer XSH's youtube link.

Here's another resource you might want to peruse:

"It is well known that when an object, such as a lump of metal, is heated, it glows; first a dull red, then as it becomes hotter, a brighter red, then bright orange, then a brilliant white. Although the brightness varies from … Read more