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Where is Earth's water?

Where is Earth's water?
The USGS Water Science School "Water, Water, Everywhere...."You've heard the phrase, and for water, it really is true. Earth's water is (almost) everywhere: above the Earth in the air and clouds, on the surface of the Earth in rivers, oceans, ice, plants, in living organisms, and inside the Earth in the top few miles of the ground. Below are two representations of where Earth's water resides. The left-side bar chart shows how almost all of Earth's water is saline and is found in the oceans. The globe image represents how much actual water exists, compared to the total size of the Earth. Distribution of Earth's Water In the first bar, notice how only 2.5% of Earth's water is freshwater - the amount needed for life to survive. View a larger version of this image and learn more. All of the World's Water Earth's freshwater Related:  Resources earth sciences

The Language of Maps Kids Should Know Though in the age of iPhones and GPSs we seem to be losing paper maps, I still love exploring maps, and believe kids need to learn map skills, and develop their geography awareness. Because of this I have many activities on Kid World Citizen to help parents and teachers teach children about maps. Kids not only can learn to read them, but to recognize their components and build their own maps. Want the materials for this lesson? Buy a full lesson plan about Map Vocabulary at the Kid World Citizen store at Teachers Pay Teachers! The Map Vocabulary Lesson Plan features three activities that help students develop a strong foundation in the geographic terminology associated with maps. Absolute Location vs Relative Location: Absolute Location: describes the exact position of a point, often using latitude and longitude “Kenya’s latitude and longitude is 1° 00′ N and 38° 00′ E; that is 1° north of the equator, and 38° east of the prime meridian.” Arctic Circle, Antarctic Circle: Axis Compass Rose

Volume of Earth's Oceans topic index | author index | special index You've heard it all before: 70 percent of the earth is covered in water! But what does that really mean? There are two origins of water: comets (extraterrestrial bombardment) and out gassing (condensation of steam from early volcanism). Ketsia Erra -- 2008 We as humans don't realize the significance of water on earth. The volume of the Earth's oceans is approximately 1.3 × 109 km3. The average depth of the oceans is 2.5 miles (4 km). The Earth is rather unique than all the other planets in our solar system. Syed S. Editor's Supplement -- 2003 External links to this page:  Some problems with the Flud, No To Pseudoscience, YouTube, 2008

Terminology Fresh water Systems[edit] The surface of a freshwater lake. Scientifically, freshwater habitats are divided into lentic systems, which are the stillwaters including ponds, lakes, swamps and mires; lotic systems, which are running water; and groundwater which flows in rocks and aquifers. There is, in addition, a zone which bridges between groundwater and lotic systems, which is the hyporheic zone, which underlies many larger rivers and can contain substantially more water than is seen in the open channel. It may also be in direct contact with the underlying underground water. Sources[edit] In coastal areas fresh water may contain significant concentrations of salts derived from the sea if windy conditions have lifted drops of seawater into the rain-bearing clouds. Water distribution[edit] Visualisation of the distribution (by volume) of water on Earth. Water is a critical issue for the survival of all living organisms. Numerical definition[edit] Aquatic organisms[edit] Fresh water as a resource[edit]

Facts: Water Water 1 in 10 people lack access to safe water Sanitation 1 in 3 people lack access to a toilet Women & Children Women and children spend 125 million hours each day collecting water Disease Every 90 seconds a child dies from a water-related disease Economics Every $1 invested in water and sanitation provides a $4 economic return Facts About Water & Sanitation Share 663 million people - 1 in 10 - lack access to safe water.1 2.4 billion people - 1 in 3 - lack access to a toilet.1 Twice the population of the United States lives without access to safe water.1,2 1/3 of the global population lives without access to a toilet.1,2 More people have a mobile phone than a toilet.1,3 The water crisis is the #1 global risk based on impact to society (as a measure of devastation), as announced by the World Economic Forum in January 2015. 4 Resource Links Look for more facts in our collection of Water Resource Links. References Donate now Get involved chevron_right Enewsletter sign-up

what's shakin An earthquake is a sudden release of stored energy. Earthquakes occur when slow but powerful tectonic forces cause stress to build up in the Earth’s crust. When the stresses get large enough, slippage is triggered along fractures in the rock known as faults. Seismic waves that travel through the rocks of the Earth’s crust are similar to the ripples that spread across the surface of a pond after a rock splashes into the still water. Seismographs are sensitive instruments that record the vibrations of passing seismic waves. Description of Hydrologic Cycle This is an education module about the movement of water on the planet Earth. The module includes a discussion of water movement in the United States, and it also provides specific information about water movement in Oregon. The scientific discipline in the field of physical geography that deals with the water cycle is called hydrology. It is concerned with the origin, distribution, and properties of water on the globe. Consequently, the water cycle is also called the hydrologic cycle in many scientific textbooks and educational materials. The global water cycle can be described with nine major physical processes which form a continuum of water movement. The information presented below is a greatly simplified description of the major contributing physical processes. Evaporation occurs when the physical state of water is changed from a liquid state to a gaseous state. Condensation is the process by which water vapor changes it's physical state from a vapor, most commonly, to a liquid.

Is there enough water for plants and animal? The water on Earth today is all the water we have so we need to look after it. We know that humans require fresh water in order to survive but so do all other living things on our planet – kangaroos, gum trees, mushrooms, ferns and moles! All living things are mostly made up of water. PlantsPlants need water, just like all living things, to grow and stay alive. AnimalsAnimals need fresh water for their bodies to function. Animals don’t have the same luxurious that humans do when it comes to sourcing fresh water. Humans need to consider other living species when thinking about water. As well as ensuring there is enough water in the environment for other species, pollution also plays an important role in the survival of animals and plants.

Oceans Alive! | The Water Planet If you look down at our planet from outer space, most of what you see is water; 71% of the planet's surface is covered by ocean and it is because of this that the Earth is sometimes called "the water planet". Only about three-tenths of our globe is covered with land. The ocean wraps the globe and is divided into four major regions: the Atlantic Ocean, the Pacific Ocean, the Indian Ocean and the Arctic Ocean. Some scientists consider the waters around Antarctica to be a separate, fifth ocean as well. These oceans, although distinct in some ways, are all interconnected; the same water is circulated throughout them all. Begin your exploration here looking at the sea:

IYA 2009 Experience Join the international celebration with these easy-to-use monthly guides. Each IYA Discovery Guide includes: • New theme every month • Hands-on activity to explore the theme • Featured celestial object and how to find it in the sky. The Night Sky Network is a nationwide coalition of amateur astronomy clubs bringing the science, technology, and inspiration of NASA's missions to the general public. We share our time and telescopes to provide you with unique astronomy experiences at science museums, observatories, classrooms, and under the real night sky. The International Year of Astronomy ( aims to help citizens of the world rediscover their place in the Universe through the daytime and nighttime sky. The Night Sky Network's International Year of Astronomy (IYA) Discovery Guides are supported and sponsored by the NASA Forums and missions listed below: Space Telescope Science Institute's Origins Education Forum Special Advisor: Denise Smith

The Hydrological Cycle | S-cool, the revision website This describes the process whereby water in its various forms is continually cycled between the land, sea and atmosphere. It also makes its way into the biosphere to influence animal and plant ecosystems around the globe. This is a common approach in geography and the two main examples in this topic are: The hydrological cycle: a closed system. The drainage basin system: an open system. Both consist of transfers, stores, inputs of water but the hydrological cycle is a closed system as no gains or losses from outside are added to the system. The drainage basin system is said to be open as both inputs and outputs of energy and material occur. Within the hydrological cycle, four main processes operate: 1. This is when plants prevent some rainfall from directly reaching the ground, for example, water on leaves or foliage. 2. Water lost from vegetation via both evaporation and transpiration. Potential Evapotranspiration: The amount of water that could be lost by evapotranspiration. 3. 4. Flow:

Measure Distance on a Map The measure distance tool is a simple way of find the distance between two points on a map. Start Clicking! Select Speed... Or choose mode of transport... How to use the Measure Distance Tool Simply click once on one point, then click again on the second point. Use the miles / km / nautical miles / yards switch to measure distances in km or in miles or nautical miles. The Quick Find text box allows you to quickly get to an area you wish without spending time zooming and panning to find it. Toggle markers will show or hide the markers if they get in the way. Clear last will remove the last point from the map Zoom to fit will zoom and pan the map to get the best fit of all your points on as large a zoom as possible. Clear Map is a reset button that will clear all points and allow you to start measuring a distance again. You can edit the position of any existing points by dragging the marker (when they are displayed) and dropping the marker in it's new position Future Ideas and Improvements

The Water Cycle summary, USGS Water Science School What is the water cycle? What is the water cycle? I can easily answer that—it is "me" all over! The water cycle describes the existence and movement of water on, in, and above the Earth. Earth's water is always in movement and is always changing states, from liquid to vapor to ice and back again. The water cycle has been working for billions of years and all life on Earth depends on it continuing to work; the Earth would be a pretty stale place without it. Where does all the Earth's water come from? A quick summary of the water cycle Here is a quick summary of the water cycle. The water cycle has no starting point, but we'll begin in the oceans, since that is where most of Earth's water exists. Air currents move clouds around the globe, and cloud particles collide, grow, and fall out of the sky as precipitation. Not all runoff flows into rivers, though. Main components of the water cycle Global water distribution Water storage in oceans: Saline water existing in oceans and inland seas