OCNG 251: EXAM 2
22 Cards in this Set
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calorie
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the amount of energy that must be added to one gram of liquid water to raise its temperature by one degree Centigrade is called?
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its ability to form hydrogen bonds
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which accounts for the unusual properties of water?
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3.5%
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dissolved substances comprise about what % of seawater?
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it remains constant until the ice melts; then it begins to rise
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a beaker contains a mixture of ice and pure water at 0 degrees. What happens to the temperature of the mixture as heat is added?
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electron sharing
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Covalent bonds form between hydrogen and oxygen atoms in a water molecule because of?
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higher than
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The heat capacity of water is ________ most other liquids.
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high boiling point of water, lower density of ice as compared to liquid water, and very high heat of evaporation of water
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Hydrogen bonding is largely
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gold
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which element is not one of the ten most abundant elements in seawater?
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cools the surface water and leaves the salts behind
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when water evaporates from the ocean, it _____.
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4
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in freshwater lakes, the surface water stops sinking when it passes ____ degrees Celsius.
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540 calories/gm
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the heat of vaporization of pure liquid water is ______.
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iron
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this element is a trace element.
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about 1 degree Centigrade
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the temperature of the surface waters of the open ocean vary in what way over a 24 hour period?
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FALSE
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true or false: the process of photosynthesis uses up oxygen.
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more oxygen and carbon dioxide are present in the oceans relative to nitrogen than in the atmosphere
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the same major gases that are found in the atmosphere are also found in the oceans. Which of the following statements is true?
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dissolved substances necessary for plant growth
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Nutrients are ______.
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7.4 - 8.4
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the pH range in the ocean is roughly _____.
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10
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of all the water that evaporates over the oceans, only about ___% falls on land masses.
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its high latitude origin
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the relatively high concentration of dissolved oxygen in the deeper layers of the ocean at the equator is mainly due to ______.
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rivers and volcanic activity along spreading centers
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dissolved substances in the ocean enter from two major sources. These are ______.
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carbon dioxide and water vapor
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absorption of outgoing radiation from earth is strongly affected by _____ in our atmosphere.
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100 years
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the residence time of carbon dioxide in the atmosphere is _____.
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Study Guide: Exam 4