Chapter 20 Section 1 Properties of Ocean Water. 1 Water in the ocean Water in the ocean –contains many dissolved solids and gases

Download Chapter 20 Section 1 Properties of Ocean Water. 1 Water in the ocean Water in the ocean –contains many dissolved solids and gases

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<ul><li><p>Chapter 20 Section 1Properties of Ocean Water</p></li><li><p>1Water in the oceancontains many dissolved solids and gases.</p></li><li><p>2Scientists do NOT describe ocean water by using properties such aspresence of dissolved vitamins and dissolved minerals.</p></li><li><p>3Why do scientists study the properties of ocean water?To understand the interactions between the:oceanatmosphereland</p></li><li><p>4The two principal gases in the atmosphere arenitrogen and oxygen.</p></li><li><p>5Ocean water contains a large amount of dissolvedcarbon dioxide.</p></li><li><p>6Most oxygen in the oceanenters at the surface of the ocean from the atmosphere.</p></li><li><p>14The dissolved solids that give the ocean its salty taste are commonly calledsea salts.</p></li><li><p>15Solids dissolved in ocean water are composed of about how many chemical elements?75</p></li><li><p>16The most common salt, halite, which makes up more than 85% of the ocean solids, is made ofsodium and chloride ions.</p></li><li><p>17Elements that exist in very small amounts are called _______ _________.trace elements</p></li><li><p>18What are three examples of trace elements found in the ocean?goldzincphosphorous</p></li><li><p>19What are the three main sources of the elements that form sea salts?volcanic eruptionschemical weathering of rock and landchemical reactions between sea water and newly formed sea-floor rocks</p></li><li><p>20How do dissolved salts and other dissolved solids enter the ocean?RiversCarry about 400 billion kg of dissolved solidsEvaporationSalts and other minerals remain</p></li><li><p>30Why does the temperature of the zone of surface water decrease only slightly as the depth increases?The mixing of the oceans surface water distributes heat downwards keeping the temperature of surface water constant.</p></li><li><p>31What happens to the temperature of surface water as latitude increases?Temperature decreasesit gets colder dude</p></li><li><p>32Where does the greatest amount of solar energy reach the surface of the ocean?The Equator</p></li><li><p>33What is the common temperature at the surface in tropical areas?30oC</p></li><li><p>34Why do vast amount of sea ice exist in polar oceans? Explain your answer.The temperature of ocean water is -2oCIt freezes at about -2oC</p></li><li><p>35A floating layer of sea ice that completely covers an area of the ocean surface is called ________.pack ice.</p></li><li><p>36Why is pack ice rarely more than 5m thick?Ice insulates water below and keeps it from freezing.</p></li><li><p>37What determines changes in ocean surface temperature in the middle latitudes?Seasons</p></li><li><p>38Why does the temperature of the water decrease sharply below the surface layer of the ocean?The sun cant directly heat ocean water below the surface layer.</p></li><li><p>39The layer in a body of water in which water temperature drops with increased depth faster than it does in other layers is called athermocline.</p></li></ul>

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