All this means that we frequently see water in its three phases on Earth (SeeFigures13.3,
13.4, and13.5).
Figure 13.3: Solid ice floating amidst liquid water. This image shows what an iceberg might
look like if you could see both above and below the surface. ( 13 )
Figure 13.4: Liquid water. ( 25 )Figure 13.5: Water vapor is invisible to our eyes. However, we can see the clouds that form
when water vapor condenses. ( 15 )
The Water Cycle
The water on Earth moves about the Earth in what is known as thewater cycle(Figure
13.6). Because it is a cycle, there truly is no beginning and no end. The very same water