The form of energy associated with the position or arrangement of objects in a system. Second Law of Thermodynamics. States that no enrgy transformation is perfectly effiecients; in a closed system, some energy from every transformation will always be lost as heat, with a corresponding increase in entropy.
When we think of water, we think of rain, lakes and rivers. because they are parts of our daily lives. Water is also found in the atmosphere, underground, in. snow, ice, seas and oceans. It is in constant motion and recycles itself through the Water Cycle. Most of the earthâs water is salty or permanently frozen. 95.1% of water on earth is estimated. to be salt water. Fresh water total only 4.9% of all water on earth. Fresh water is found in. ice, lakes, rivers, streams and underground.
The water in rivers is much less salty than that in the ocean. Typically, the salt content in rivers is about 100 parts per million and the ocean is approximately one thousand times as salty. However, when river water enters the ocean, the water evaporates and the salt is left behind. Over time, the total amount of water in the oceans reaches an equilibrium amount. In any given year, let us say that 60 inches of rain falls, on average, across the earth, but the same amount of water evaporates.