What is a hydrogen bond?

Water has several special properties. A hydrogen bond is unusual because it can exist in its three different forms at the same temperature. The reason for many of water’s special properties, is the type of bond or attachment that is …

What is water evaporation?

Steam rising off the water.

Evaporation is a process where liquid turns into a gas. When water gains heat energy it changes to a gas. An increase in temperature speeds up the rate of evaporation. Water evaporates when it is boiled.

How does water evaporate?

What is a watershed?

A watershed is the land that drains into a body of water. That is why it is also called a drainage basin. Runoff from rain and melting snow or ice flows over and through the land to collect in ponds, …

Water for Youth

All About Water

Welcome to the For Youth, For Life learning site for water. This learning area will help you understand what water is, why it is important, and how it is useful in our world. You will learn about

What is water?

Water molecule details.

Water is a colorless and odorless substance found all over Earth. Water is made up of billions of molecules. Each molecule is made of one oxygen and two hydrogen atoms held together by strong covalent bonds.  

Water is found …

What is an element?

A chemical element is a substance made up of only one type of atom, and distinguised by its atomic number (the number of protons in its nucleus). Common examples of elements are hydrogen, carbon, nitrogen, and oxygen.
In total, 117 …

What is an atom?

An atom is the smallest part of a chemical element.
An atom consists of an electron cloud of negatively charged electrons that surrounds a dense nucleus. This nucleus contains positively charged protons and electrically neutral neutrons. When the number of …