orange pa rin..
Oranges sink in water without their skin because the flesh of the orange is denser than water. The skin of the orange is less dense and filled with air pockets, which gives it buoyancy. Without the skin, the orange's dense flesh causes it to sink in water.
An Orange with a Skin on will Float- Air will be trapped inside the skin, but an Orange without the skin on, although lighter, has no air trapped, and will, in turn, sink.
Snooki
I believe it's just called an orange peel.
Rind
Commonly known as an "orange peel". If you want to get technical its "Albedo".
The entire skin is called the rind. The outer layer where all the color is is called the zest.
The rind is the skin of the orange. The top layer is zest, which is used in cooking as a flavor.
It can go orange, put universal indicator on your skin and it will go orange.
Segments
Both. You drink orange juice or eat the fruit in full (of course without its skin).
Ummm... orange