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All about Water!!! By: Nicole Dueñas, Ignacio Rosales, Ma. Cristina Martínez 8B


Index 1. 2. 3. 4. 5. 6. 7.

Water cycle Evaporation Condensation Precipitation Surface run-off Percolation Earths Water


Water Cycle The Water Cycle is the ´´trip´´ water takes when it goes from the land to the sky and back again. It is also known as the hydrologic cycle. It describes the continuous movement of water on, above and below the surface of Earth. The water cycle involves the exchange of heat energy, which leads to temperature changes. It affects the climate in the Earth because it depends on it, ex: if there was more evaporation therefore there is more rain in some days.


Evaporation Evaporation is when water changes from a liquid to a gas transferred from land and water masses to the atmosphere. Evaporation depends on: 

Wind speed: the higher the wind speed, the more evaporation Temperature: the higher the temperature, the more evaporation Humidity: the lower the humidity, the more evaporation Oceans, seas, lakes, and rivers provide nearly 90 percent of the atmospheric evaporation The effect that evaporation causes in climate is moist.


Condensation Condensation is the process by which water vapor in the air is changed into liquid water, it forms clouds as a result for climatic patterns. These clouds may produce precipitation, which is the primary way for water to return to the Earth's surface within the water cycle. Responsible for ground level fog, for you glasses fogging up, etc. As condensation happens and liquid water forms from the vapor, the water molecules become organized in a less random structure and heat is released into the atmosphere.


Precipitation Precipitation is when water is released from the clouds in the form we know as rain, freezing rain, sleet, snow, or hail. Precipitation forms based in condensation. It provides the delivery of atmospheric water to the Earth. Most precipitation falls as rain. Precipitation can be categorized in 3 categories, if it falls as liquid water, liquid water that freezes on contact with the surface, or ice. Water is continually evaporating and condensing in the sky. For precipitation to happen, first water droplets must condense in dust, salt, or smoke particles.


Surface run-off When rain hits soaked ground it begins to flow overland downhill, this is called surface runoff. Precipitation falls on the land, flows overland (runoff), and goes into rivers, which then go to the oceans. This is the main ´´idea´´ of how this works in the water cycle. Much of the water in rivers comes directly from surface runoff. Surface run-off depends on many things as: - Type of precipitation - Rainfall intensity, amount, duration - Precipitation that occurred earlier and resulting soil moisture


Percolation Percolation is the movement of fluids through porous materials. ´´Physics concepts such as scaling theory, renormalization, phase transition, critical phenomena and fractals are useful to characterize percolation properties´´.´


Earths Water


As we all know each year the amount of fresh water decreases due to global warming. Most of the earth’s water is saline, about 96%. 2.5% is the amount of fresh water. 68 percent of fresh water is in ice and glaciers. Another 30 percent of freshwater is in the ground. Fresh water is found in rivers, lakes, underground and glaciers too.


MLA: "Precipitation (meteorology)." Wikipedia. Wikimedia Foundation, 21 May 2012. Web. 21 May 2012. <http://en.wikipedia.org/wiki/Precipitation_(meteorol ogy)>. "The Water Cycle." The Water Cycle, U.S. Geological Survey (USGS) Water Science School. Web. 21 May 2012. <http://ga.water.usgs.gov/edu/watercycle.html>.


All about Water