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3.5: Engineering and Society Vocabulary
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- Body of water
- A significant amount of water either naturally (such as lakes, rivers, and oceans) or man-made (such as ponds, lakes, and harbors).
- A substance that may be harmful to humans or other forms of life when released into the environment.
- a widespread outbreak of a contagious disease.
- The force of attraction exerted between objects. Often, this is the force of attraction that the earth exerts on objects at its surface.
- A disease-producing organism.
- pH (potential of Hydrogen)
- A measure of the activity of hydrogen ions (H+) in a solution. This is a measure of the solution’s acidity or alkalinity. pH is the logarithm of the reciprocal of the effective hydrogen-ion concentration and is a number between and 14; the number has no units. A pH of 7 indicates neutrality, that is, the solution is neither acidic nor alkaline. pH numbers lower than 7 indicate acidity, while pH numbers higher than 7 indicate alkalinity. Each change of 1 pH represents a tenfold change in acidity or alkalinity.
- To make something dirty, foul, or unclean.
- Potable water is water that is clean enough to drink.
- Water that falls from the atmosphere to the earth’s surface. The most common form of precipitation is rain. Snow, sleet, hail, and freezing rain are also forms of precipitation.