Triangle of Exposure

1. Aperture is a hole through which light travels. You can control the light that comes through by making the aperture larger or smaller. It is measured in F-stops.

2. Shutter Speed is how fast the shutter moves and how long the light has to penetrate the aperture and reach the image sensor or film. Basically it controls the length of the light exposure.

3.ISO is the type of film or type of image sensor. You can change the ISO to make your image sensor more or less sensitive to light thus affecting the intensity of light in your photographs.

4. Depth of field is the distance between the nearest object and farthest object that appear sharp in a  given frame. This gives the photograph an element of depth

5. Motion Blur is the apparent streaking of a rapidly moving object in a still image. This can be done through either rapid movement or long exposure.

6.Noise and light sensitivity is visual distortion or an image, it is equivalent to grain in film. If the image sensor is very sensitive to light it will be more grainy.

Bibliography:
http://www.adorama.com/alc/article/12955
http://en.wikipedia.org/wiki/Aperture
http://en.wikipedia.org/wiki/Depth_of_field