Notes

In physics, a wave is a disturbance that transfers energy through matter or space, with little or no associated mass transport. Waves consist, instead, of oscillations or vibrations of a physical medium or a field, around relatively fixed locations. In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields. In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels. In water waves, energy is transferred through the vibration of the water particles.Waves located on the ocean's surface are commonly caused by wind transferring its energy to the water, and big waves, or swells, can travel over long distances. A wave's size depends on wind speed, wind duration, and the area over which the wind is blowing (the fetch). Though waves do cause the surface water to move, the idea that waves are travelling bodies of water is misleading. Waves are actually energy passing through the water, causing it to move in a circular motion, much like a buoy or seabird floating on the surface. Interestingly, waves move energy, not water, far distances. Water works as the medium through which kinetic energy, or energy in motion, passes. The water is moving, of course, but only in a circular motion. For one thing, ocean waves are dense with energy. The area of the World Ocean is about 361.9 million square kilometers (139.7 million square miles), which covers about 70.9% of Earth's surface, and its volume is approximately 1.335 billion cubic kilometers (320.3 million cubic miles). Your body uses water in all its cells, organs, and tissues to help regulate its temperature and maintain other bodily functions. Because your body loses water through breathing, sweating, and digestion, it's important to rehydrate by drinking fluids and eating foods that contain water.The Importance of Water to Human Health. Water is essential to the functioning of every single cell and organ system in the human body. Water makes up greater than 2/3 of the weight of the human body; the brain is 75% water, blood is 83% water, bones are 22% water, muscles are 75% water, and the lungs are 90% water.