Plan1. Water.2. Uses of water.3. What water is made of.4. On Earth.5. Water pollution.

Water 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, it freezes and becomes ice. Frozen rain can be ice or snow if conditions permit. If water gets very hot (above 100 degrees Celsius), it boils and becomes steam. Water is very important for life.

Uses of water Plants and animals (including people) are mostly water inside, and must drink water to live. It gives a medium for chemical reactions to take place, and it is the main part of blood. It keeps the body temperature the same by sweating from the skin. Water helps blood carry nutrients from the stomach to all parts of the body to keep the body alive. Water also helps the blood carry oxygen from the lungs to the body. The human body is between 60% and 70% water.

What water is made of Water is a molecule made of 2 hydrogen atoms and 1 oxygen atom. Its chemical formula is H2O. Water has a surface tension, so a little water makes drops on a surface, rather than spreading out to wet the surface. Water can also be called 'aqua', which is the Roman word for water. Water is also used for recreational purposes. Though a human being can survive for up to a three weeks without food, they can only survive for a day or two without water. A few desert animals can get enough water from their food, but the others must drink.

On Earth Hydrology is the study of the movement, distribution, and quality of water throughout the Earth. The study of the distribution of water is hydrography. The study of the distribution and movement of groundwater is hydrogeology, of glaciers is glaciology, of inland waters is limnology and distribution of oceans is oceanography. Ecological processes with hydrology are in focus of ecohydrology.

Water pollution Water pollution is the pollution of bodies of water, such as lakes, rivers, the oceans, as well as groundwater. It occurs when pollutants reach these bodies of water, without treatment. Waste from homes, factories and other buildings get into the water bodies. Water pollution is a problem for the species and ecosystems there. It affects plants and organisms living in the water. In almost all cases the effect is damaging not only to individual species and populations, but also to the wider biological communities. The color is usually green or brown but normal water can be blue.

Thanks for watching