What is the atmosphere?

A thin blanket of gases surround earth, divided into layers.

A solid combination of one or more minerals found in crust.

The measure of dissolved salt in water in general.

Which one of the following does NOT describe characteristics of the earth's core?

It is the zone of hot, partly-melted rock that flows.

All of the following describe a source zone except:

Populated by warm-water fish needing dissolved oxygen.

Which indirect effect directly impacts seasons?

Differences in solar intensity and day length.

All of the following are characteristic of floodplain zones except:

Water is never muddy, and contains low amounts of silt.

Please list the different concentric zones of the earth, starting from the inner-most layer.

Core, mantle, asthenosphere, crust

All of the following are characteristics of Rayleigh waves except:

It travels faster than Love waves.

All of the following are benefits of volcanic eruptions except:

They reduce the loss of human life.

Which of the following correctly lists, by (%), the present-day composition of the atmosphere?

Nitrogen, Oxygen, Argon, CO2, Water vapor, trace gases

Which of the following are true regarding the process of desalination? (Select all that apply).

It involves removing dissolved salts from ocean/salty water., Methods include distillation and reverse osmosis., Saudi Arabia gets ~70% of its drinking water from it.

All of the following are characteristics of the stratosphere except:

Its concentration of ozone is extremely low.

How is the thermohaline conveyor belt driven by changes in both temperature and salinity?

It is driven by the resulting changes in density of water

What is mass extinction?

The extinction of many species in a relatively short period

All of the following are characteristics of P waves except:

It shears rock sideways at right angles

Land area that delivers water & sediment to a major stream.

Volcanoes spew ash into the air, causing a volcanic winter. This is an example of what?

Negative feedback (more ash, greater albedo effect)

Which of the following is not an effect of El Nino?

Hurricanes in Hawaii, Brazil, and Ecuador.

What is the lithosphere?

The combination of both the crust and the outer mantle.

Which of the following is NOT true regarding the Colorado River?

Its water is used to produce about 1% of all US crops

What is the major benefit of having a healthy ozone layer?

It prevents most UV-B from reaching earth's surface.

A crown fire recently broke out in Fremont, destroying many trees. What is a valid projection?

Soil erosion will increase b/c of the lack of trees.

Coastal land areas covered with water all/part of the year.

All of the following are ways in which metamorphic rock forms except:

When animal and plant remains are deposited in layers.

Characterize the following by plate boundary: Mid-Atlantic Ridge, Himalayas, San Andreas fault

Divergent; convergent; transform

Which of the following is NOT a reason why some consider a projected extinction rate of 1% low?

Extinction rates were completely miscalculated.

Which of the following events are capable of causing mudslides? (Choose all that apply).

Droughts, Heavy rains, Earthquakes, Volcanic eruptions

All of the following are characteristics of the formation of oceanic gyres except:

They move clockwise in the N. Hemisphere

What is the focus of an earthquake?

Place where an earthquake begins, below surface.

What is an earthquake?

Shaking of ground caused by fracturing/displacement of rock

Which of the following is NOT a true statement regarding earth's water composition?

Ground ice & permafrost hold only 30% of surface freshwater

Which of the following regarding tectonic plates is true?

Much geologic activity at the surface occurs at boundaries

All of the following describe a transition zone except:

The water is faster flowing, and has more DO.

What are trade winds? (Choose all that apply).

Pattern of easterly surface winds in the tropics, In N. Hemisphere: N to E; in S. Hemisphere: S. to E, Surface winds that blow East to West

Which of the following is NOT a benefit of floods?

Kill thousands of people and cause much property damage.

Which of the following is NOT a problem associated with widespread use of desalination?

All of these options are problems regarding desalination.

All of the following are characteristics of an S wave except:

Not very damaging to structures.

Describe the process in which stratospheric ozone forms.

Oxygen molecules in the stratosphere interact with UV

What is sedimentary rock?

Made of dead plant and animal remains and weathered rocks.

All of the following can cause tsunamis except:

All of these can cause tsunamis.

When does desertification occur? (Choose all that apply).

When overgrazing and deforestation reduce/degrade topsoil., When productive potential of topsoil falls by >10%

Which of the following is NOT true regarding perennial crops?

Perennials result in more soil erosion than annuals.

What is the Coriolis effect? (Choose all that may apply).

The effect is strongest at the poles, nonexistent at equator, The apparent curvature of global winds and ocean currents., Occurs due to the rotation of the Earth on its axis.

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Duplicate of APES - Earth Systems

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AP Environmental Science review covering Earth Systems. #apenvironmentalscience #apes #earthsystems #scholars #academy #mrcarter

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Questions 99

Answers

1
What is the atmosphere?
Blanket of gases that increases in pressure with altitude.
A thin blanket of gases surround earth, divided into layers.
A thick blanket of gases consisting of spherical layers.
A blanket of gases with a homogeneous density of molecules.
2
What is a rock?
A solid combination of one or more minerals found in crust.
A concentration of naturally occurring material from crust.
Contains large enough concentrations of a profitable mineral
It is made only of sediments.
3
What is salinity?
The measure of dissolved salt in water in general.
The measure of salinity and its impact on turbidity.
The measure of dissolved salt in oceanic water.
The measure of turbidity and salt averaged together.
4
The largest circulation of water on earth is a direct result of changes in:
Wind patterns and salinity.
Temperature and precipitation
Temperature and wind patterns.
Temperature and salinity.
5
Which one of the following does NOT describe characteristics of the earth's core?
It is surrounded by a liquid core of molten/semisolid matter
It is extremely hot and has a solid inner part.
It is the earth's innermost zone.
It is the zone of hot, partly-melted rock that flows.
6
Which of the following describe an El Niño effect (see image below)?
I, II, IV only
I, II, III, and IV.
I and II only.
I, II, III only.
7
All of the following describe a source zone except:
Populated by warm-water fish needing dissolved oxygen.
Most of the plants are algae and mosses attached to rocks.
Water tumbles downward over obstacles, dissolving O2
Where headwaters are usually shallow, cold, clear, and swift
8
Which indirect effect directly impacts seasons?
The earth's rotation and its tilt of 23.5 degrees.
Differences in solar intensity and day length.
The rotation of the earth around the sun.
The angle of the moon.
9
All of the following are characteristic of floodplain zones except:
Water has higher temperatures and less dissolved oxygen
Fairly large populations are usually supported.
Water is never muddy, and contains low amounts of silt.
Streams join into wider, deeper rivers
10
Please list the different concentric zones of the earth, starting from the inner-most layer.
Core, mantle, asthenosphere, crust
Asthenosphere, crust, mantle, core
Core, asthenosphere, mantle, crust
Crust, asthenosphere, mantle, core
11
All of the following are characteristics of Rayleigh waves except:
Move both vertically and horizontally in a vertical plane.
Do not produce perpendicular or transverse waves
It travels like rolling ocean waves.
It travels faster than Love waves.
12
All of the following are benefits of volcanic eruptions except:
They reduce the loss of human life.
They form lakes (e.g. Crater Lake)
They form majestic mountains
The weathering of lava contributes to fertile soil.
13
Which of the following correctly lists, by (%), the present-day composition of the atmosphere?
Nitrogen, Oxygen, Argon, CO2, Water vapor, trace gases
CO2, nitrogen, oxygen, argon, water vapor, trace gases.
Oxygen, nitrogen, argon, CO2, water vapor, trace gases
Nitrogen, oxygen, CO2, argon, water vapor, trace gases
14
Which of the following are true regarding the process of desalination? (Select all that apply).
It involves removing dissolved salts from ocean/salty water.
Methods include distillation and reverse osmosis.
It does not involve using chemicals to sterilize water.
Saudi Arabia gets ~70% of its drinking water from it.
15
All of the following are characteristics of the stratosphere except:
It contains less matter than the troposphere
Its concentration of ozone is extremely low.
Extends about 17 to 48 km above earth's surface.
It volume of water vapor is 1/1000 that of the troposphere.
16
How is the thermohaline conveyor belt driven by changes in both temperature and salinity?
It is driven by changes in air pressure.
It is driven by the resulting changes in density of water
It is driven by the amount of species capable surviving.
It is driven by temperature only.
17
What is mass extinction?
The extinction of many species in a relatively short period
When an existing species outcompetes another.
When global changes occur in climactic conditions.
When a single species can no longer be found on Earth.
18
All of the following are characteristics of P waves except:
They are fastest type of wave
They can travel through both solid rock and liquid material.
It shears rock sideways at right angles
It moves like sound waves (spreads out, compresses, dilutes)
19
What is a watershed?
Land area that delivers water & sediment to a major stream.
Upper surface of the zone of saturation.
Rough measure of volume of water we use to support ourselves
The saturation of soil with water, flooding the water table.
20
Volcanoes spew ash into the air, causing a volcanic winter. This is an example of what?
A positive feedback loop (more ash, weaker albedo effect)
Positive feedback (more ash, greater heating of surface).
Negative feedback (more ash, greater albedo effect)
Negative feedback (more ash, less cold penetrating surface)
21
Which of the following is not an effect of El Nino?
Droughts in southern Africa, India, Sri Lanka, and Australia
Hurricanes in Tahiti and Hawaii.
Flooding in Bolivia, Ecuador, Northern Peru, and Cuba.
Hurricanes in Hawaii, Brazil, and Ecuador.
22
What is the lithosphere?
The combination of both the crust and the outer mantle.
It consists only of the layer above the asthenosphere.
It is the outermost and thinnest zone of the earth.
It includes only the continental and oceanic crusts.
23
Which of the following is NOT true regarding the Colorado River?
Little from the river reaches the sea due to overuse.
Its water is used to produce about 1% of all US crops
Water from the river supports cities in desert-like climate.
It has experienced prolonged drought since 1999.
24
What is the major benefit of having a healthy ozone layer?
It prevents both UV-B and UV-C from reaching earth.
It prevents most UV-B from reaching earth's surface.
It blocks all harmful waves of radiation.
It prevents UV-C from reaching earth's surface.
25
A crown fire recently broke out in Fremont, destroying many trees. What is a valid projection?
Soil erosion will decrease due to new plants after the fire.
It will start raining more in the area for compensation
Another fire will break out soon.
Soil erosion will increase b/c of the lack of trees.
26
What are estuaries?
When rivers meet the sea, mixing water as well as nutrients
Unproductive ecosystems with low nutrient levels.
Coastal land areas covered with water all/part of the year.
Harsh coastal ecosystems with only occasional water changes
27
All of the following are ways in which metamorphic rock forms except:
When animal and plant remains are deposited in layers.
When chemically active fluids reform preexisting rocks.
When rock is subjected to high temperatures
When preexisting rock is subjected to high pressures
28
Characterize the following by plate boundary: Mid-Atlantic Ridge, Himalayas, San Andreas fault
Divergent; convergent; transform
Divergent; transform; convergent
Convergent; divergent; transform
Transform; convergent; divergent
29
Which of the following is NOT a reason why some consider a projected extinction rate of 1% low?
Rates are likely to increase sharply in the next century.
Extinction rates were completely miscalculated.
Current rates in certain areas are already much higher.
We continue to eliminate biologically diverse environments.
30
Which of the following events are capable of causing mudslides? (Choose all that apply).
Droughts
Heavy rains
Earthquakes
Volcanic eruptions
31
All of the following are characteristics of the formation of oceanic gyres except:
They move cold water from the poles to the equator.
They bring cool air to coastline, warm air to continents
They move clockwise in the N. Hemisphere
They form when water moves direction of prevailing winds
32
What is the focus of an earthquake?
Located where an earthquake ends.
Located directly above epicenter
Located above the surface.
Place where an earthquake begins, below surface.
33
Which soil horizon(s) contain(s) most of a soil's inorganic matter? (Choose all that may apply)
R Horizon
C Horizon
A Horizon
B Horizon
34
What is an earthquake?
Shaking of ground caused by fracturing/displacement of rock
When energy suddenly forms and causes underground vibrations
Shaking caused by fracturing of divergent plate boundary
Shaking caused by formation of convergent plates
35
All of the following describe air circulation cells except:
They are caused by the Coriolis effect.
They are also known as ENSO.
Global air circulation patterns caused by uneven heating.
They include, from equator to poles: Hadley, Ferrel, Polar.
36
Which of the following is NOT a true statement regarding earth's water composition?
Groundwater makes up 30.1% of earth's freshwater.
Ground ice & permafrost hold only 30% of surface freshwater
Glaciers and ice caps make up 68.7% of the freshwater.
The atmosphere contains 3% of the surface freshwater.
37
What type of irrigation uses underground water sprayed from mobile booms with sprinklers?
Rotary System
Gravity Flow
Drip Irrigation
Center Pivot
38
Two examples of igneous rock include:
Sandstone and shale
Lava rock and granite
Marble and slate
Limestone and lignite
39
Which of the following regarding tectonic plates is true?
Continental plates usually ride below oceanic plates.
Tectonic plates' boundaries are not active at the surface.
Much geologic activity at the surface occurs at boundaries
They do not cause/form mountains, volcanoes, or earthquakes.
40
All of the following describe a transition zone except:
More fish species with lower O2 demand are supported.
The water can be more turbid from suspended sediment.
The water is faster flowing, and has more DO.
Main streams merge to form wider, deeper, warmer streams
41
What are trade winds? (Choose all that apply).
Pattern of easterly surface winds in the tropics
In N. Hemisphere: N to E; in S. Hemisphere: S. to E
Surface winds that blow East to West
They form the Ferrel cells
42
Which of the following is NOT a benefit of floods?
Create and deposit nutrient-rich silt in floodplains.
Recharge groundwater & help refill wetlands.
Kill thousands of people and cause much property damage.
Support biodiversity & aquatic ecological services.
43
Which of the following is NOT a problem associated with widespread use of desalination?
High cost due to expensive energy needed for removing salt.
Need for large pipes and chemicals, which kills marine life
All of these options are problems regarding desalination.
Huge amounts of salty wastewater produced.
44
All of the following are characteristics of an S wave except:
it shears rock sideways at right angles
Not very damaging to structures.
It cannot propagate in the liquid parts of the earth
They are a slower type of secondary wave
45
Describe the process in which stratospheric ozone forms.
Oxygen molecules interact with particulate matter
Oxygen in the troposphere interacts with UV radiation.
Oxygen reacts with UV to form photochemical smog.
Oxygen molecules in the stratosphere interact with UV
46
About 75-80% of the earth's air mass is found in the
Exosphere
Troposphere
Stratosphere
Thermosphere
47
What is sedimentary rock?
Made of dead plant and animal remains and weathered rocks.
Forms when rock undergoes high temperatures or pressures.
Forms below or on earth's surface when lava cools.
Examples include sandstone, shale, slate, and marble.
48
All of the following can cause tsunamis except:
A landslide caused by an earthquake
All of these can cause tsunamis.
When the ocean floor suddenly rises or drops
When certain types of faults in ocean floor move up or down
49
When does desertification occur? (Choose all that apply).
When forest fires prevent erosion from occurring.
When overgrazing and deforestation reduce/degrade topsoil.
When deforestation allows for more annual plants to grow.
When productive potential of topsoil falls by >10%
50
Which of the following is NOT true regarding perennial crops?
They are better adapted to regional soil than annuals.
There is no need to till the soil.
They can live for many years without having to be replanted.
Perennials result in more soil erosion than annuals.
51
What is the Coriolis effect? (Choose all that may apply).
The effect is strongest at the poles, nonexistent at equator
The apparent curvature of global winds and ocean currents.
It is the weakest at the poles, strongest at equator.
Occurs due to the rotation of the Earth on its axis.
52
Which of the following would conserve soil?
Monocultures
Aquifer depletion
Soil salinization
High-yield polyculture
53
Which of the following are characteristics of atmospheric pressure? (Check all that apply)
It is the force, or mass, per unit area of a column of air.
Decreases with altitude.
Would be weakest at sea level.
It is the force caused by the bombardment of molecules
54
Which of the following are examples of ozone-depleting chemicals (indicate all that apply).
Halons and HBFCs (used in fire extinguishers).
Methyl bromide (fumigant) and hydrogen chloride
Hexachlorobutadiene
Carbon tetrachloride, methyl chloroform, n-propyl bromide
55
All of the following are characteristics of a stratovolcano except:
Gentle lower slopes, but steep upper slopes; concave upward
large, approx. 1-10 km in diameter
Explosive; numerous layers of lava
Very quiet; volcanic materials consist of cinders.
56
Which of the following describe volcanic hotspots? (Click all that apply).
They are located along the Pacific Plate boundaries
An example is the Hawaiian volcanoes within the Pac. Plate
They are created by anomalous volcanism
They are places within the mantle where magma is generated.
57
Describe the process that forms oceanic ridges.
When two oceanic plates collide.
When oceanic plates move apart, magma flows through cracks.
When continental plates move apart, causing magma to rise.
When plates slide and grind past one another.
58
All of the following are characteristics of a mineral except:
Occurs naturally in the earth's crust as crystalline solid
Contains large enough concentration of particular mineral
May have a regularly repeating internal atomic arrangement
It is an element or inorganic ompound
59
Which of the following describe the characteristics of a shield volcano?
Very gentle slopes; convex upward; quiet; fluid lava flows
Gentle lower slopes, but steep upper slopes; explosive
Steep conical hill with straight sides; explosive
Very small; less than 300m high
60
What is a tributary?
Areas nearest the river's course that are often flooded.
A smaller river/stream flowing into a larger river or lake.
A smaller stream flowing into a
A smaller river flowing into a smaller one.
61
Which of the following does NOT describe the process of upwelling?
Movement of nutrient-rich bottom water to ocean's surface.
Occurs when cold water is pushed away & warm water rises.
Usually takes place along certain steep coastal areas.
During El Nino, it is reduced along the Peruvian coast.
62
Please list the layers of the atmosphere in order (starting from layer nearest to surface).
Thermosphere, Stratosphere, Mesosphere, Troposphere
Troposphere, Stratosphere, Mesosphere, Thermosphere
Stratosphere, Troposphere, Mesosphere, Thermosphere
Troposp., Stratosp., Mesosphere, Thermosp., Exosphere
63
What are/were CFCs used for?
Coolants in air conditioners and refrigerators
Cleaners for electric parts such as computer chips
All of the following are/were uses for CFCs.
Propellants in aerosol spray cans
64
Which of the following are characteristics of the rock cycle?
It plays a major role in forming concentrated deposits
It involves, in order: erosion, weathering, transportation.
Rocks are broken down, melted, fused together and heated.
It is the slowest of the earth's cyclic processes.
65
List examples of the following, in order: sedimentary rock, metamorphic rock, igneous rock.
Lava rock; marble; lignite
Bituminous coal; marble; granite
Dolomite; granite; marble
Granite; slate; dolomite
66
What is weather? (Click all that may apply).
The averaged conditions of a given area over much time.
Includes several factors in a given area over a short period
The general pattern of atmospheric conditions over time.
A set of physical conditions of the lower atmosphere
67
Briefly describe the process of subduction.
Oceanic plate rides over and pushes continental into mantle.
When oceanic plates move apart, creating ocean ridges.
Continental crust rides over and pushes down oceanic plate.
When oceanic and continental plates collide and rise up.
68
Which of the following describe La Niña?
Occurs along the tropical west coast of South America.
Usually causes cooler than normal temperatures.
Usually causes with warm ocean temperatures in Pacific Ocean
Climate pattern that describes cooling of surface waters
69
What type of boundary forms when oceanic plates slide & grind past one another along fractures?
A subduction zone
A transform fault
Oceanic ridges
A trench boundary
70
Which of the following is NOT true regarding nutrient cycling in tropical rain forests?
Decaying matter is processed quickly b/c of many decomposers
The nutrients sit within the bedrock.
Nutrient uptake by plants is improved by fungi.
The majority of nutrients are locked up in vegetation.
71
What natural services do inland wetlands provide? (Choose all that may apply).
Reducing flooding, erosion, and overflows.
Filtering and degrading toxic wastes and pollutants.
Maintaining biodiversity by providing habitats.
Natural recharge of groundwater aquifers.
72
A soil with 30% clay, 50% sand, and 20% silt is called:
Sandy Clay
Loamy Sand
Sandy Clay Loam
Sandy Loam
73
Which of the following describe the characteristics of a cinder cone volcano?
Very gentle slopes; convex upward.
Steep conical hill with straight sides.
Gentle lower slopes, but steep upper slopes; concave upward
Very large, approx. 1-10km in diameter.
74
What type of irrigation usually comes from an aqueduct system or a nearby river? (<80% effic.)
Drip Irrigation
Center Pivot
Rotary System
Gravity Flow
75
What are tectonic plates?
The flows of energy and heated material in convection cells.
Areas of the lithosphere that move slowly around the mantle.
A zone of hot, melted rock that flows like plastic.
The outermost and thinnest zone of the earth.
76
What is seafloor spreading?
Spreading of ocean crust solely due to earthquakes.
Movement & spreading of ocean crust above continental crust.
Formation of new ocean crust as result of magma pushing up.
When lava pushes & spreads seafloor u from subsurface.
77
Which of the following is NOT a correct statement regarding water on the earth?
Interconnected oceans cover 90% of earth's ocean hemisphere
Salty oceans contain 97% of the earth's water.
Freshwater systems cover over 2.2% of the earth's surface.
Salty oceans cover 71% of the earth's surface.
78
Where do active volcanoes occur?
Where lava reaches the earth's surface through a vent/crack.
Where magma reaches the earth's surface through a vent/crack
Only in hotspots, such as Hawaii.
Never along plate boundaries.
79
What is weathering?
The climactic changes in weather.
Internal processes that build up the earth's surface.
The different processes that break down rocks into soil.
When acid deposition quickly breaks down monuments.
80
What is foliation?
Scratchability, or hardness, of
The ratio of mass of substance to mass of volume of water
The texture of metamorphic rocks due to alignment & pressure
Ability of a mineral to break, when struck, along directions
81
Which of the following is NOT true regarding the Ogallala Aquifer in the United States?
It lies under 8 midwestern states
It supplies about 1/3 of all groundwater in the USA.
It has forced the Great Plains to become a barren farmland.
It is the world's largest known aquifer.
82
Why does climate vary in different parts of the earth?
Global air circulation patterns distribution
All of the options are correct reasons.
Ocean currents distribute heat and precipitation unevenly.
Uneven heating of the earth's surface by the sun.
83
What is high-grade ore?
It contains a large concentration of the desired mineral.
It is not as profitable as low-grade ore.
It contains a small concentration of the desired mineral.
Identified resources from which we can extract minerals
84
What are aquatic life zones? (Choose all that apply).
They only contain oceans, bays and estuaries.
Saltwater and freshwater portions of the biosphere
They include only lakes, rivers, streams.
They are portions that are able to support life.
85
All of the following describe internal geologic processes except:
Processes driven directly or indirectly by solar energy.
Processes generated by heat from the earth's interior
Processes that may form mountains and volcanoes.
Processes that build up the earth's surface
86
What is the Tectonic Cycle?
Sum of processes that build up & break down the lithosphere
Theory that lithosphere made up of plates that always move.
Sum of methods that build up & break down the asthenosphere
Climate change, geographic barriers, extinction, & volcanoes
87
What is biological extinction?
The destruction of an entire ecosystem.
The depletion of a commercially-valuable species.
The complete disappearance of a species from the earth.
The disappearance of a population, or group of organisms.
88
All of the following are characteristics of a Love wave except:
It is a surface wave that moves like S waves.
It rolls like ocean waves, up-down and sideways
It moves the ground from side to side at right angles.
It is very damaging to the foundations of structures.
89
What are inland wetlands?
Lands located away from coastal areas covered in freshwater.
They are always seasonal wetlands.
Lands near coastal areas covered in salty water.
Lands away from the coast covered in water for a short time
90
What is climate? (Click all that apply).
Short-term atmospheric conditions that change often
General patterns that occur over at least 3 decades
Weather patterns of the last week averaged together.
An area's general pattern of atmospheric conditions
91
The roots of most plants and the majority of a soil's organic matter are concentrated in:
The A horizon and B horizon
The O horizon only.
The A horizon and E horizon
The O horizon and A horizon
92
Which of the following statements regarding freshwater is NOT true?
Only about 0.024% of all water is readily available to us.
It is one of the most important forms of natural capital.
1/6 people do not have sufficient access to clean water
Water is a well-managed & appreciated resource.
93
Which of the following describe the Ring of Fire?
All of preceding options are correct.
String of volcanoes and seismic activity sites
It is where about 90% of all earthquakes occur.
Located at edges of Pacific Ocean, at plate boundaries.
94
Which of the following does NOT involve the iron catastrophe?
When the melting point of iron was reached.
Silicon and oxygen were moved to form the mantle and crust.
When heavy elements such as Al and Na moved to the core.
When iron flowed toward the interior because of gravity.
95
What are the most widely used nonmetallic minerals?
Phosphate salts and gravel.
Sand and gravel.
Sand and limestone.
Sand and phosphate salts.
96
What is natural recharge?
Natural restoration of valuable resources such as trees.
Natural replenishment of a watershed in a sensitive area.
Natural process of restoring nitrates into soil.
Natural replenishment of an aquifer by precipitation.
97
What type of irrigation is b/w 90-95% efficient and delivers water to individual plant roots?
Rotary systems
LEPA Center pivot
Drip Irrigation
Gravity Flow
98
What are Hadley cells? (Choose all that apply).
Convection currents that cycle N & S of the poles.
Where air rises at equator and sinks at medium latitudes.
They involve the prevailing westerlies.
Large scale atmospheric convection cells
99
Several volcanoes have erupted in Fremont since 2010. What is a plausible prediction?
A decrease in the amount of sulfur in the air.
A volcanic winter.
A volcanic summer.
A decrease in the amount of air pollution.

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