a broad, continuous movement of water in an ocean or other body of water
What is a current?
a glacier, or ice sheet, covering all or a significant part of a continent
What is a continental glacier?
the gradually sloping area between a seacoast and the edge of an ocean basin
What is the continental shelf?
a large ripple set in motion by steady winds
What is a wave?
sources of pollution that are small and defined
What is point source?
a measure of how clear something is, including water; determined by the amount of matter suspended in it
What is clarity?
when large chunks of ice break off from the edge of a glacier and become icebergs
What is calve?
a steep area dividing a continental shelf from an ocean basin
What is the continental slope?
occur when lines pointing from Earth to the Sun and the Moon are perpendicular to each other (at a 90 degree angle)
What is Neap Tide?
area of land that drains into a body of water
What is a watershed?
pollution of groundwater caused by human activities
What is contamination?
a deep fissure, or crack in ice
What is crevasse?
long undersea mountains formed by underwater volcanic activity
What is an ocean ridge?
the largest tidal movements; occur when Earth, Moon, and Sun are lined up
What is a Spring Tide?
an area of porous rock with a water system flowing through it
What is an aquifer?
In North America, the continuous ridge of mountain summits dividing the continent into two main drainage areas.
What is the Continental Divide?
A glacier that forms between mountain ranges
What is a valley glacier?
narrow, steep-sided underwater canyons are formed by the movement of Earth's tectonic plates.
What are trenches?
the difference in the water level between high tide and low tide
What is tidal range?
the process in which eroded material is dropped or left
What is deposition?
the process of making food using energy from chemical reactions; carried out by bacteria around sea-floor vents
What is chemosynthesis?
a mountain ridge carved by two or more glaciers from several directions
What is an arrete?
on the deep ocean floor, usually at the base of a continental slope.
What is the abyssal plain?
a wave that breaks or collapses into foam when it reaches shallow water or a beach
What is a breaker?
in the ground, the level beneath which porous rocks are saturated with water
What is a water table?