In the camera the shutter speed controls how much light hits the media. So we are taking a picture at night we want to let the shutter speed open for a longer time compared to a sunny day where the shutter speed is open for small amount of time. Shutter speed also can be used to freeze a subject in time.
Aperture is the feature of the lens and it has nothing to do with the camera but it is controlled by the camera. when we take a picture of a subject the aperture controls the background. For example, in my picture you can see the person in the front clearly but the background is blurry.
When we took pictures using different ISO we learn the difference each ISO brings out. Also we learn how long the shutter speed is opened affects the ;picture. For example, if you are using ISO 100 you need to you 1/50 shutter speed but if you are using ISO 3200 you need to increase the time the shutter speed is open for. Overall this was a good project to have a good understanding of exposure Principals.