Water Science School

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Rainbow Springs, Florida, USA
March 11, 2011

Spring water is usually clear and cool, which attracts swimmers.

Rainbow Springs, Florida, USA

A spring is a water resource formed when the side of a hill, a valley bottom or other excavation intersects a flowing body of groundwater at or below the local water table, below which the subsurface material is saturated with water. A spring is the result of an aquifer being filled to the point that the water overflows

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Flowing artesian well in Brunswick, Georgia, USA
December 31, 2001

Flowing artesian well in Brunswick, Georgia, USA

Groundwater in aquifers between layers of poorly permeable rock, such as clay or shale, may be confined under pressure. If such a confined aquifer is tapped by a well, water will rise above the top of the aquifer and may even flow from the well onto the

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Die Hidrologiese Siklus, The Natural Water Cycle, Afrikaans
June 25, 2016

Die Hidrologiese Siklus, The Natural Water Cycle, Afrikaans

Die Hidrologiese Siklus, The Natural Water Cycle, Afrikaans

Jy mag dink dat elke druppel reën wat uit die lug val of elke glas water wat jy drink is splinternuut, maar dit was nog altyd hier en is deel van die natuurlike watersiklus.

Lakes: Hidden Lake, Montana
August 19, 2009

Lakes are temporary storage places for water moving in the water cycle

Lakes are an important component of the natural water cycle

A lake really is just another component of Earth's surface water. A lake is where surface-water runoff and groundwater seepage have accumulated in a low spot, relative to the surrounding countryside.  A lake really is just another component of Earth's 

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Attribution: Water Resources
Water in a glass cylinder, showing the meniscus.
June 28, 2019

A meniscus is seen along the edges of this glass cylinder.

What is a meniscus?

A meniscus is a curve in the surface of a molecular substance (water, of course) when it touches another material. With water, you can think of it as when water sticks to the inside of a glass.

Why a meniscus occurs

Adhesion is responsible for a meniscus and this has to do in part with water's fairly high surface tension. Water

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A paper clip floating on water, due to surface tension.
June 28, 2019

Paper clip can float on water, due to high surface tension of water

It seems to defy the laws of physics, but a paper clip made of steel can indeed float on the water surface. The high surface tension helps the paper clip - with much higher density - float on the water.

The cohesive forces between liquid molecules are

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The Water Table: A hole dug at the beach showing the "water table" level.
June 25, 2010

The Water Table: A hole at the beach illustrates the "water table".

A hole dug at the beach is a great way to illustrate the concept of how, below a certain depth, the ground, if it is permeable enough to hold water, is saturated with water. The upper surface of this zone of saturation is called the water table. The saturated zone beneath the water table is called an aquifer, and aquifers are huge storehouses of water. What you are looking

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The strong polar bond between water molecules creates water cohesion.
June 18, 2019

The strong polar bond between water molecules creates water cohesion.

Cohesion: Hydrogen Bonds Make Water Sticky

Water has an amazing ability to adhere (stick) to itself and to other substances. The property of cohesion describes the

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An algae bloom on Lake Le-Auqa-Na, Illinois.
June 17, 2019

Algal blooms occur in many water bodies where there is too much "food"

Harmful Algal Blooms

USGS scientists identified potentially harmful levels of cyanobacteria in lakes they sampled in Illinois during the drought of 2012. Toxins produced by the cyanobacteria were measured at harmful concentrations in four lakes.  Cyanobacteria, also called blue-green algae, are capable of generating toxins (cyanotoxins), such as microcystin, that

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ജല ചക്രം, The Water Cycle, Malayalam
June 19, 2016

ജല ചക്രം, The Water Cycle, Malayalam

ജല ചക്രം, The Water Cycle, Malayalam

круговорот воды, The Water Cycle for Schools, Russian
February 20, 2017

круговорот воды, The Water Cycle for Schools, Russian

круговорот воды, The Water Cycle for Schools, Russian

Вы можете думать, что каждая капля дождя, падающая с неба, или вода, которую мы пьем, совершенно новая, но она всегда была и есть частью круговорота воды в природе.

पानी/जल च्रक, The Water Cycle for Schools, Hindi
February 20, 2017

पानी/जल च्रक, The Water Cycle for Schools, Hindi

पानी/जल च्रक, The Water Cycle for Schools, Hindi

आप सोचते होंगे कि आसमान से गिरी बारिश की हर एक बूंद, या आपके पीने के पानी का प्रत्‍येक गिलास, हर बार नया है, परन्‍तु यह हमेशा से यहां पर है और  यह पानी/जल चक्र का भाग है ।