Triangle of Exposure

Aperture: A space through which light passes in an optical or photographic instrument
Shutter Speed: The exposure time, how long it takes for the shutter to close
ISO: Measures the sensitivity of the image sensor
Motion Blur: When the shutter speed is lower than the speed of the object there is a visual blur behind the object
Noise and Light Sensitivity: How sensitive the film is to sources of light and audible noise.