APES Final Exam Review, Sections
coverage, exam predictor, rated A+
abiotic - ✔✔-Pertaining to factors or things that are separate and independent from living things;
nonliving.
acid - ✔✔-Any compound that releases
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APES Final Exam Review, Sections
coverage, exam predictor, rated A+
abiotic - ✔✔-Pertaining to factors or things that are separate and independent from living things;
nonliving.
acid - ✔✔-Any compound that releases hydrogen ions when dissolved in water. Also, a water solution
that contains a surplus of hydrogen ions.
A layer - ✔✔-a soil horizon; the layer below the O layer is called the A layer. The A layer is formed of
weathered rock, with some organic material; often referred to as topsoil.
alkaline - ✔✔-a basic substance; chemically, a substance that absorbs hydrogen ions or releases
hydroxyl ions; in reference to natural water, a measure of the base content of the water.
aquifer - ✔✔-an underground layer of porous rock, sand, or other material that allows the movement of
water between layers of nonporous rock or clay. Aquifers are frequently tapped for wells.
arable - ✔✔-land that's fit to be cultivated.
asthenosphere - ✔✔-the part of the mantle that lies just below the lithosphere.
atmosphere - ✔✔-the gaseous mass or envelope surrounding a celestial body, especially the one
surrounding the Earth, which is retained by the celestial body's gravitational field.
barrier island - ✔✔-a long, relatively narrow island running parallel to the mainland-built up by the
action of waves and currents and serving to protect the coast from erosion by surf and tidal surges.
biological weathering - ✔✔-any weathering that's caused by the activities of living organisms.
biotic - ✔✔-living or derived from living things.
B layer - ✔✔-a soil horizon; B receives the minerals and organic materials that are leached out of the A
horizon.
chemical weathering - ✔✔-the result of chemical interaction with the bedrock that is typical of the
action of both water and atmospheric gases.
C layer - ✔✔-a soil horizon, horizon C is made up of larger pieces of rock that have not undergone much
weathering.
clay - ✔✔-the finest soil, made up of particles that are less than 0.002 mm in diameter.
convection - ✔✔-the vertical movement of a mass of matter due to heating and cooling; this can happen
in both the atmosphere and Earth's mantle.
convection currents - ✔✔-air currents caused by the vertical movement of air due to atmospheric
heating and cooling.
convergent boundary - ✔✔-a plate boundary where two plates are moving toward each other.
coral reef - ✔✔-an erosion-resistant marine ridge or mound consisting chiefly of compacted coral
together with algal material and biochemically deposited magnesium and calcium carbonates.
Coriolis effect - ✔✔-The observed effect of the Coriolis force, especially the deflection of an object
moving above the Earth, rightward in the Northern Hemisphere, and leftward in the Southern
Hemisphere.
crop rotation - ✔✔-the practice of alternating the crops grown on a piece of land - for example, corn
one year, legumes for two years, and then back to corn.
delta - ✔✔-a usually triangular alluvial deposit at the mouth of a river.
divergent boundary - ✔✔-a plate boundary at which plates are moving away from each other. This
causes an upwelling of magma from the mantle to cool and form new crust.
doldrums - ✔✔-a region of the ocean near the equator, characterized by calms, light winds, or squalls.
drip irrigation - ✔✔-a method of supplying irrigation water through tubes that literally drip water onto
the soil at the base of each plant.
earthquake - ✔✔-the result of vibrations (often due to plate movements) deep in the Earth that release
energy. They often occur as two plates slide past one another at a transform boundary.
El Nino - ✔✔-a climate variation that takes place in the tropical Pacific about every three to seven years,
for a duration of about one year.
erosion - ✔✔-the process of soil particles being carried away by wind or water. Erosion moves the
smaller particles first and hence degrades the soil to a coarser, sandier, stonier texture.
estuary - ✔✔-the part of the wide lower course of a river where its current is met by the tides.
fault - ✔✔-the place where two plates abut each other.
Green Revolution - ✔✔-the development and introduction of new varieties of (mainly) wheat and rice
that has increased yields per acre dramatically in countries since the 1960s.
greenhouse effect - ✔✔-the phenomenon whereby the Earth's atmosphere traps solar radiation, caused
by the presence in the atmosphere of gases such as carbon dioxide, water vapor, and methane that
allow incoming sunlight to pass through, but absorb heat radiated back from the Earth's surface.
Hadley cell - ✔✔-a system of vertical and horizontal air circulation predominating in tropical and
subtropical regions and creating major weather patterns.
Headwaters - ✔✔-the water from which a river rises; a source.
Horizon - ✔✔-a layer of soil.
humus - ✔✔-the dark, crumbly, nutrient-rich material that results from the decomposition of organic
material.
hurricane (typhoon, cyclone) - ✔✔-a severe tropical cyclone originating in the equatorial regions of the
Atlantic Ocean or Caribbean Sea or eastern regions of the Pacific Ocean, traveling north, northwest, or
northeast from its point of origin, and usually involving heavy rains.
inner core - ✔✔-the molten core of the Earth.
jet stream - ✔✔-a high-speed, meandering wind current, generally moving from a westerly direction at
speeds often exceeding 400 km (250 miles) per hour at altitudes of 15 to 25 km (10 to 15 miles).
land degradation - ✔✔-when soil becomes water-logged and then dries out, and salt forms a layer on its
surface.
La Nina - ✔✔-a cooling of the ocean surface off the western coast of South America, occurring
periodically every 4 to 12 years and affecting Pacific and other weather patterns.
lithosphere - ✔✔-the outer part of the Earth, consisting of the crust and upper mantle, approximately
100 km (62 miles) thick.
loamy - ✔✔-soil composed of a mixture of sand, clay, silt, and organic matter.
mantle - ✔✔-the layer of the Earth between the crust and the core.
monoculture - ✔✔-the cultivation of a single crop on a farm or in a region or country; a single,
homogeneous culture without diversity or dissension.
O layer - ✔✔-the uppermost horizon of soil. It is primarily made up of organic material, including waste
from organisms, the bodies of decomposing organisms, and live organisms.
physical (mechanical) weathering - ✔✔-any process that breaks rock down into smaller pieces without
changing the chemistry of the rock; typically wind and water.
plate boundaries - ✔✔-the edges of tectonic plates.
prior appropriation - ✔✔-when water rights are given to those who have historically used the water in a
certain area.
rain shadow - ✔✔-the low-rainfall region that exists on the leeward (downwind) side of a mountain
range. This rain shadow is the result of the mountain range's causing precipitation on the windward
side.
red tide - ✔✔-a bloom of dinoflagellates that causes reddish discoloration of coastal ocean waters.
Certain dinoflagellates of the genus Gonyamfox produce toxins that kill fish and contaminate shellfish.
R horizon - ✔✔-The bedrock, which lies below all of the other layers of soil, is referred to as the R
horizon.
riparian right - ✔✔-the right, as to fishing or to the use of a riverbed, of one who owns riparian land (the
land adjacent to a river or stream).
salinization - ✔✔-the process in which soil becomes saltier and saltier until, finally, the salt prevents the
growth of plants. Salinization is caused by irrigation because salts brought in with the water remain in
the soil as water evaporates.
sand - ✔✔-the coarsest soil, with particles 0.05,2.0 mm in diameter.
silt - ✔✔-soil with particles 0.002,0.05 mm in diameter.
Southern Oscillation - ✔✔-the atmospheric pressure conditions corresponding to the periodic warming
of El Nino and cooling of La Nina.
subduction zone - ✔✔-in tectonic plates, the site at which an oceanic plate is sliding under a continental
plate.
thermocline - ✔✔-a layer in a large body of water, such as a lake, that sharply separates regions
differing in temperature, so that the temperature gradient across the layer is abrupt.
thermosphere - ✔✔-the outermost shell of the atmosphere, between the mesosphere and outer space,
where temperatures increase steadily with altitude.
topsoil - ✔✔-the A layer of soil is often referred to as topsoil and is most important for plant growth.
trade winds - ✔✔-the more or less constant winds blowing in horizontal directions over the Earth's
surface, as part of Hadley cells.
transform boundary - ✔✔-also known as transform faults, boundaries at which plates are moving past
each other, sideways.
tropical storm - ✔✔-a cyclonic storm having winds ranging from approximately 48 to 121 km (30 to 75
miles) per hour.
upwelling - ✔✔-a process in which cold, often nutrient-rich, waters from the ocean depths rise to the
surface.
volcanoes - ✔✔-an opening in the Earth's crust through which molten lava, ash, and gases are ejected.
watershed - ✔✔-the region draining into river system or other body of water.
water-scarce - ✔✔-countries that have a renewable annual water supply of less than 1,000 m3 per
person.
water-stressed - ✔✔-countries that have a renewable annual water supply of about 1,000,2,000 m3 per
person.
weather - ✔✔-the day-to-day variations in temperature, air pressure, wind, humidity, and precipitation
mediated by the atmosphere in a given regio
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