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8.E.1.2 Hydroshpere 4 Multiple Choice Test

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8.E.1.2 Hydroshpere 4

Summarize evidence that Earth's oceans are a reservoir of nutrients, minerals, dissolved gases, and life forms:

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Which natural feature protects inland bodies of water from contamination by salt water?

Most of the oxygen in Earth’s atmosphere is produced in the top six inches of the oceans. Which best explains this?

Why are large numbers of ocean animals found in areas where upwelling occurs?

Which technology has allowed scientists to accurately map the ocean floor?

Which dissolved gases are most needed by plants and animals living in the ocean?

Which property must submersibles and ROVs (remotely operated vehicles) share?

Which best explains why inhabitants of an estuary must adapt to frequent environmental changes?

Why are estuaries often valued as the center of human coastal communities?

Which are the two main sources of the dissolved oxygen in the ocean?

Which best describes an estuary?

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