Deutsch: Wasser / Español: Agua / Português: Água / Français: Eau / Italiano: Acqua

Water is a liquid at normal temperatures but exists also solid (ice), and water vapor (cloud) in the air.

A water molecule has the formula H2O which means that two hydrogen (H) atoms and one oxygen (O) are connected.

The Earth's surface is covered with water for about 71%. It is necessary (vital) for nearly all forms of life on Earth.

The distribution of water is roughly

  • 96.5% in seas and oceans,
  • 1.7% in groundwater,
  • 1.7% in glaciers and the ice caps of Antarctica and Greenland
  • The rest is in the air as moisture, clouds and precipitation

From all this water, only 2.5% is freshwater and from this 98.8% of that water is in ice and groundwater.

0.3% of all freshwater (0.0075% of all water) is in rivers, lakes, and the atmosphere.

Freshwater is permanently moved by

Access to safe drinking ressources is essential for all (not only human) forms of life on Earth.

List of books: Water

Related Articles

Matter ■■■■■■■■
Matter is anything that has mass (the amount of material in an object) and takes up space. On the earth, . . . Read More
Hydrosphere ■■■■■■■■
A Hydrosphere is the part of the Earth composed of water including clouds, oceans, seas, ice caps, glaciers, . . . Read More
Hydrologic Cycle ■■■■■■■
A Hydrologic Cycle is the process of evaporation, transpiration, condensation, precipitation, infiltration, . . . Read More
Liquid ■■■■■■
Liquid is one of the four fundamental states of matter (the others being solid, gas, and plasma), and . . . Read More
Rain ■■■■■■
Rain is liquid water in the form of droplets that have condensed from atmospheric water vapor and then . . . Read More
General Circulation Model ■■■■■■
A General Circulation Model (GCM) is a global, three-dimensional computer model of the Climate system . . . Read More
Deionized water ■■■■■■
A Deionized water is Common industrial water used to remove contaminants from Products and equipment . . . Read More
Sulfur ■■■■■
Sulfur or sulphur (see spelling differences) is a chemical element with symbol S and atomic number 16. . . . Read More
Nitrogen ■■■■■
Nitrogen, symbol N, is the chemical element of atomic number 7. At room temperature, it is a gas of diatomic . . . Read More
Chemical Element ■■■■■
A Chemical Element is a fundamental substance comprising one kind of atom; the simplest form of matter; . . . Read More