Water is the most common liquid on Earth. It covers about 71.4% of the Earth. Pure water has no smell, taste, or color. Lakes, oceans, and rivers are made of water. Rain is water that falls from clouds in the sky. If water gets very cold (below 0 degrees Celsius), it freezesand becomes ice. Frozen rain is hail. Snow is formed from water vapour, not rain. If water gets very hot (above 100 degrees Celsius), itboils and becomes steam. Water is very important for life. However, some studies suggest that by 2025 more than half of the peoplearound the world will not have enough water. Water is a fluid. Water is the only chemical substance on earth that exists naturally in three states. People know of over 40 anomaliesabout water. Unlike most other liquids such as alcohol or oil, when water freezes, it expands by about This expansion can cause pipes to break if the water inside them freezes.