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| A molecule that has electrically charged areas. |
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| The combined force of attraction among water molecules and with the molecules of surrounding materials. |
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| The tightness across the surface of water that is caused by the polar molecules pulling on one another. |
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| A mixture that forms when one substance dissolves another. |
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| A substance that dissolves another substance. |
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| The amount of heat needed to increase the temperature of a certain mass of a substance by 1 degree C. |
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| The process by which molecules at the surface of a liquid absorb enough energy to change to the gaseous. |
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| The process by which a gas changes to a liquid. |
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| The natural cycle of water evaporation and condensation which creates pure fresh water from inpure and salty water. (The water cycle) |
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| Energy that is sorted and waiting to be used. |
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| The form of energy that an object has when it is moving. |
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| Rain which has become mixed with oxides of sulfur or nitrogen to produce acids. |
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| The simplest true living things. |
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| A bacterial disease commonly transmitted by water polluted with sewage. |
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| Inflamation of the liver caused by a virus and which is commonly transmitted by water contaminated with sewage. |
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| A detergent which can be broken down by bacteria into chemicals which do not harm the environment. |
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| A substance such as nitrogen or phosphorus that enables plants and algae to grow. |
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| A chemical used to kill animals |
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| A chemical used to kill plants. |
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| An extremely hazardous chemical which can be a water pollutant. |
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| The clear yellowish liquid found within the lymphatic system in the body which contains white blood cells. |
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