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Temperature - Molecular Interpretation, Thermometers And Temperature Scales, The Fahrenheit Scale Of Temperature, The Celsius Scale

heat energy water finger

Temperature is intuitively associated with the sense of hot and cold. Put your finger in a pan of hot water and energy flows as heat from the water to your finger; you say that the water is at a higher temperature than your finger. Now put your finger in a glass of ice water and energy flows as heat in the other direction. The direction of energy flow as heat is the basis of our definition of temperature. Temperature is the property of objects—or more generally, systems—that determines the direction of energy flow as heat when the objects are put in direct contact with each other. Energy flows as heat from objects at higher temperature to ones at lower temperature. When energy as heat ceases to flow, the objects are at the same temperature and are said to be in thermal equilibrium.

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Other Free Encyclopedias » Science Encyclopedia » Science & Philosophy: A-series and B-series to Ballistic Missiles - Categories Of Ballistic Missile » Bacteria - Characteristics Of Bacteria, Bacterial Growth, Physical And Chemical Requirements For Bacterial Growth, The Role Of Bacteria In Fermentation - Aerobic and anaerobic bacteria

Bacteria - Physical And Chemical Requirements For Bacterial Growth

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extreme ranges The physical and chemical requirements for growth can vary widely among different species of bacteria, and some are found in environments as extreme as cold polar regions and hot, acid springs.



In general, the physical requirements for bacteria include proper temperature, pH and osmotic pressure.

The anatomy of a typical bacterium. Illustration by Hans & Cassidy. Courtesy of Gale Group. Most bacteria thrive only within narrow ranges of these conditions, however extreme those ranges may be.







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Bacteria - Physical And Chemical Requirements For Bacterial Growth

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