1. The largest of four, this ocean contains more than one-half the earth's water and covers one-third of the earth's surface.
2. The primary producers responsible for up to 70% of primary productivity near the ocean surface are
3. Key factors that determine the types and numbers of organisms found in different ocean water layers include temperature, food availability, light availability, nutrient availability, and
4. We continue to live in an "Age of Discovery," learning about nature all around us. Some areas have been more thoroughly researched than others, which means that some areas still have many secrets to reveal. Which of the following do we currently know the least about?
5. Examples of organisms that live in the abyssal zone are
6. The euphotic zone of deep aquatic systems is
7. This aquatic zone makes up only 10% of the world's ocean area, but contains 90% of all marine species.
8. Areas that are partially enclosed bodies of water where rivers meet the sea, and therefore areas of mixed fresh and salt water, are called
9. Beaches experience a high and low tide several times a day. The land region between high and low tides is called the
10. Coral reefs are among the world's
11. Although a number of factors vary, the primary factor that defines each of the three open ocean zones (euphotic, bathyal, abyssal) is
12. A recent research report of open ocean findings showed that
13. In a 2008 four-year study, researchers discovered that one primary species has greatly affected the world's oceans.
14. Because of its high amount of sunlight and nutrients that wash in from the land, this freshwater zone has a high biodiversity. Species include crayfish, turtles, frogs, and rooted plants.
15. A large lake that has clear, cold water and very few organisms living in it is called a ________ lake.
16. Freshwater rivers and streams may begin as melting snow on mountains or melting glaciers, or as runoff from precipitation on mountains. The region producing the water for rivers and streams is called the
17. The entire land area that delivers freshwater runoff, sediments, and dissolved oxygen and nutrients is called the
18. The portion of a freshwater river that empties into the ocean may be described as
19. Which of the following is not considered a freshwater inland wetland?
20. Humans can validly be accused of degrading and disrupting many freshwater systems; we cannot be accused of
Brendan Swanson