Digital Media.

First lets see if we can list how many forms of digital media surronds us (you should be able to come up wih at least 5)

• Digital Television
• Internet (web)
• Computers
• Video games
• Video Cameras

What number system is digital data based on? What two digits are used to code all digtal data?
A digital computer represents data using the binary numeral system. Text, numbers, pictures, audio, and nearly any other form of information can be converted into a string of bits, or binary digits, each of which has a value of 1 or 0. The most common unit of storage is the byte, equal to 8 bits.

What is a bit? What is a byte?
The byte, is a unit of digital information in computing and telecommunications, that most commonly consists of eight bits.
A bit or binary digit is the basic unit of information in computing and telecommunications; it is the amount of information stored by a digital device or other physical system that exists in one of two possible distinct states. These may be the two stable states of a flip-flop, two positions of an electrical switch, two distinct voltage or current levels allowed by a circuit, two distinct levels of light intensity, two directions of magnetization or polarization.

What is "sampling rate"? Find an image that explains how how sampling works (wikipedia is a good resource here... you can place these images in your blog)
The sampling rate, sample rate, or sampling frequency defines the number of samples per second (or per other unit) taken from a continuous signal to make a discrete signal. For time-domain signals, the unit for sampling rate is hertz. The inverse of the sampling frequency is the sampling period or sampling interval, which is the time between samples

How does colour depth (Colour Depth) or bit depth effect the appearance of an image? Find some images to illustrate the effect.             
Color Depth refers to the number of bits (binary digits) of computer memory that are used to store color information for an image (typically a bitmap) or for a device (such as a screen).
The greater the color depth, the more colors may be stored, and this also determines how many different colors the image or device may simultaneously contain/display

Colour Depth effects both still and video digital media. Sampling rate only effects video but not still media. Can you explain.

Sampling rate only affects video as it takes the sample per second, a video is a moving image and therefore the sampling rate would take the images per second. However colour depth only affects still and video digital media. Nothing is produced in still images and therefore a sampling rate is not affected.