The document discusses the water cycle and the states of water. It notes that 71% of Earth's surface is covered by water, with 97% being salt water and 2% being fresh water found in glaciers and ice caps. The water cycle involves water evaporating from oceans and land into vapor, condensing into clouds, and precipitating back out as rain or snow through precipitation, where it is then collected in oceans, lakes, rivers, and soil or used by plants, animals, and humans.