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Chapter 19. The Ocean Basins. 1.Global Ocean. the body of salt water that covers nearly three-fourths of Earth’s surface. 2. Sea. a large, commonly saline body of water that is smaller than an ocean and that may be partially or completely surrounded by land. 3. Oceanography.

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chapter 19

Chapter 19

The Ocean Basins

1 global ocean
1.Global Ocean

the body of salt water that covers nearly three-fourths of Earth’s surface.

2 sea
2. Sea
  • a large, commonly saline body
  • of water that is smaller than
  • an ocean and that may be
  • partially or completely
  • surrounded by land.
3 oceanography
3. Oceanography
  • the scientific study of the ocean,
  • including the properties and
  • Movement of ocean water, the
  • characteristics of the ocean
  • floor, and the organisms that
  • live in the ocean.
4 sonar
4. Sonar

sound navigation and ranging,

a system that uses acoustic

signals and returned echoes

to determine the location of

objects or to communicate.

5 continental margin
5. Continental Margin

the shallow sea floor that is

located between the shoreline

and the deep-ocean bottom.

6 deep ocean basin
6. Deep-Ocean Basin
  • the part of the ocean floor
  • that is under deep water
  • beyond the continent margin
  • and that is composed of
  • oceanic crust and a thin layer
  • of sediment.
7 trench
7. Trench
  • a long, narrow, and steep
  • depression that forms on the
  • ocean floor as a result of
  • subductionof a tectonic plate,
  • that runs parallel to the trend of a
  • chain of volcanic islands or the
  • coastline of a continent, and that
  • may be as deep as 11 km below
  • sea level.
8 abyssal plain
8. Abyssal Plain

a large, flat, almost level area

of the deep-ocean basin.

9 core sample
9. Core Sample

a cylindrical piece of sediment,

rock, soil, snow, or ice that is

collected by drilling.

10 nodule
10. Nodule
  • a lump of minerals that is
  • made of oxides of manganese,
  • iron copper, or nickel and that
  • is found in scattered groups
  • on the ocean floor.
11 desalination
11. Desalination

a process of removing salt

from ocean water.

12 precipitation
12. Precipitation
  • any form of water that falls
  • to Earth’s surface from the
  • clouds; includes rain, snow,
  • sleet, and hail.
13 condensation
13. Condensation
  • the change of state from a
  • gas to a liquid.
14 evapotranspiration
14. Evapotranspiration
  • the total loss of water from an area,
  • which equals the sum of the water
  • lost by evaporation from the soil and
  • other surfaces and the water lost by
  • transpiration from organisms.
15 water cycle
15. Water Cycle
  • the continuous movement of
  • water between the
  • atmosphere, the land, and
  • the oceans.
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