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EVSC 2050 Test 3 Study Set
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EVSC 2050 Test 3 Study SetApogee - Answer The point in an orbit most distant from the body being orbited; the
highest point
Perigee - Answer The point in the orbit of the moon when it is nearest the earth; the
closest or lowest point.
Ebb Tide - Answer Falling tide; the period of the tide between high water and the next
low water.
Flood Tide - Answer Rising tide; the period of the tide between low water and the next
high water.
Amphidromic Point - Answer Point from which cotidal lines radiate on a chart; the
nodial, or low amplitude, point for a rotary tide.
Cotidal Lines - Answer Lines on a chart making the location of the tide crest at stated
time intervals.
Corange Line - Answer In a rotary tide, lines of equal tidal range about the amphidromic
point.
Slack Water - Answer State of a tidal current when its velocity is near zero; occurs when
the tidal current changes direction.
Syzygy - Answer the straight line configuration of 3 celestial bodies (as the sun and
earth and moon) in a gravitational system
Spring Tide - Answer Tide occurring near the times of the new and full Moon, when the
range of the tide is greatest.
Neap Tide - Answer Tide occurring near the times of the first and last quarters of the
Moon, when the range of the tide is least.
Equilibrium Theory of Tides - Answer Theoretical tide formed by the tide-producing
forces of the Moon and Sun on a non-rotating, water-covered Earth.
Dynamic Theory of Tides - Answer State in which the sums of all charges are balanced
and there is no net charge.
Diurnal Tides - Answer Tide with one high water and one low water each tidal day.
Semi-diurnal Tides - Answer Tide with two high waters and two low waters each day.
Mixed Diurnal Tide - Answer Type of tide in which large inequalities between the two
high waters and the two low waters occur in a tidal day.
Lunar Day - Answer The period of time taken for the moon to make one full rotation on its
, axis.
Lunar Month - Answer Time required for the Moon to pass from one new Moon to another
new Moon.
Solar Day - Answer Time period determined by one rotation of Earth relative to the Sun
Primary Coast - Answer Coastline shaped primarily by terrestrial processes rather than
marine processes.
Secondary Coast - Answer Coastline shaped primarily by marine forces or marine
organisms.
Eustatic - Answer Global change in sea level that affects all the world's coastlines
Fjord - Answer Narrow, deep, steep-walled inlet formed by the submergence of a
mountainous coast or by the entrance of the ocean into a deeply excavated glacial
trough after the melting of the glacier. A deep, small-surface-area estuary with
moderately high river input and little tidal mixing.
Sill - Answer Shallow area that separates two basins from one another or a coastal bay
from the adjacent ocean.
Ria - Answer A primary coast formed when rising sea level, caused by the melting of
glaciers and ice sheets following the last ice age, flooded coastal river valleys.
Drowned River Valley - Answer A valley drowned by rising sea levels or, inland, the
construction of a dam.
Delta - Answer Area of unconsolidated sediment deposits, usually triangular in outline,
formed at the mouth of a river.
Lava Coast - Answer A primary coast formed by active volcanism producing lava flows
that extend to the sea.
Dune Coast - Answer A primary coast formed by the deposition of sand in dunes by the
wind.
Fault Coast - Answer A primary coast formed by tectonic activity and faulting.
Sea Stacks - Answer Isolated masses of rock rising from the sea near a headland from
which it has been separated by erosion.
Barrier Islands - Answer Deposits of sand, parallel to shore and raised above sea level;
may support vegetation and animal life.
Sand Spit - Answer Low tongue of land, or a relatively long, narrow shoal extending from
the shore.
Sand Hooks - Answer Spit turned landward at its outer end.
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