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Question: grade 12 directions read pages 478481 and answer the folowing...

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Grade 1.2 Directions: Read pages 478.-481 and answer the folowing 1. How were the oceans first formed? 2. What percentage of the Earths surface is covered with oceans? 3. Where does the salt in saltwater come from? 4. Look at Figure 17-3. What percentage of the ocean water are salts? 5. What is the name of the salt we use on our food? 6. 7.Is the overall level of ocean salinity constant? is the measure of the amount of solids dissolved in seawater.
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