Cycles
How does ocean pollution impact the ocean's capabilities as a Carbon Sink?
a. By providing outside nutrients to marine life resulting in more respiration
b. By harming marine life such as phytoplankton, lowing photosynthetic organisms
c. By causing a decrease in nitrogen fixing bacteria
d. There is no impact.
b. By harming marine life such as phytoplankton, lowing photosynthetic organisms
To increase soil fertility and production, farmers -
A. strip the land of vegetation before plowing
B. rotate a variety of crops
C. plow in the direction of the slope
D. monocrop year after year
B. rotate a variety of crops
20. While geothermal plants emit very low levels of greenhouse gases compared to fossil fuels, what environmental resource challenge can geothermal operations face?
A) Heavy reliance on imported uranium fuel rods
B) Complete destruction of river habitats miles away
C) Large land requirements that destroy thousands of forest acres
D) Tremors/ earthquakes and high consumption of water during production and cooling processes
D) Tremors/ earthquakes and high consumption of water during production and cooling processes
This biome experiences high average annual temperatures, extremely low rainfall, and lacks tree species.
The desert
Why do farmers implement crop rotation in sustainable crop management?
A. To prevent soil nutrient depletion and manage pest populations naturally
B. To clear wild ecosystems for continuous single-crop cultivation
C. To reduce the need for livestock on the farm
D. To increase topsoil temperature for faster seed germination
A. To prevent soil nutrient depletion and manage pest populations naturally
In what biome would the changing of fur coats occur during seasonal changes
a. Temperate Deciduous Forests
b. Deserts
c. Marine biome
d. Rainforests
a. Temperate Deciduous Forests
Replacing native forests and grasslands with impervious concrete surfaces causes this hydrological step to dramatically increase during storm events
a. Percolation and Infiltration
b. Condensation
c. Ammonification
d. Runoff
D. Runoff
What would occur to local aquatic life that received agricultural runoff full of fertilizer containing heavy nitrites and phosphorus?
a. Eutrophication, causing algal blooms
b. Ammonification, bringing nitrogen into the soil from decomposers
c. Assimilation, resulting in plant nitrate absorption
d. Denitrification, bacteria returning nitrogen into the atmosphere as nitrogen gas
b. Ammonification, bringing nitrogen into the soil from decomposers
Considering the human effects on the carbon and nitrogen cycle, what are ways individuals can reduce their energy use inside and outside the home.
Which activity will help individuals conserve nonrenewable energy sources?
A. Using appliances powered by solar energy
B. Relying on nuclear energy to power homes
C. Supplementing fuel sources by using unrefined petroleum
D. Powering households using personal natural gas sources
A. Using appliances powered by solar energy
High freeze resistance and seasonal white camouflage are critical animal adaptations for surviving in which biome?
A. Tundra C. Desert
B. Freshwater D. Grassland
Tundra
Flood irrigation is considered a water conservation method because flood
irrigation causes water to -
a. stagnate across the field, leading to waterlogging and soil erosion
b. accumulate on the surface of the ground, which the crops need for survival
c. percolate to recharge groundwater, which can be reused for irrigation
d. evaporate and runoff into nearby bodies of water, causing algal blooms
c. percolate to recharge groundwater, which can be reused for irrigation
What impact do rising global temperatures have on freshwater reserves?
A. They cause rivers to increase flow rates beyond maximum biodegradation capacity.
B. They accelerate glacier melting into marine (salt) water.
C. They prevent aquifers from percolating naturally.
D. They increase the concentration of salt within freshwater lakes.
B. They accelerate glacier melting into marine (salt) water.
How do plants naturally get phosphorus and silicon?
a. Lightning strikes turn air dust into plant food that falls with rain.
b. Plants absorb them directly from the air through their leaves.
c. Soil bacteria pull these elements from the air and feed them to plant roots.
d.Water breaks down rocks containing these elements, releasing them into the soil for plant roots to absorb.
d.Water breaks down rocks containing these elements, releasing them into the soil for plant roots to absorb.
How do controlled, prescribed burns help manage forest environments?
A.They eliminate the requirement to regulate commercial timber harvesting.
B.They permanently stop the natural succession process in mature ecosystems.
C.They remove accumulated underbrush and small trees to prevent massive wildfires.
D.They completely sterilize soil to prevent unwanted plant species from emerging.
C.They remove accumulated underbrush and small trees to prevent massive wildfires.
A commercial energy resource requires 120 units of energy to locate, extract, refine, and transport to consumers. Upon processing, the resource yields 60 units of usable energy. How will this resource perform in the marketplace?
A) It will be competitive in the market due to high production efficiency.
B) It will remain competitive only if heavily taxed by government agencies.
C) It cannot compete in the marketplace because its net energy is negative.
D) It will maintain a stable market price because energy input equals energy output.
C) It cannot compete in the marketplace because its net energy is negative.
As the sunlight is setting, a forest vulture is consuming a dead organism on top of a granite rock that has a few mushrooms growing on it. List the abiotic factors.
Sunlight and granite rock
A population of wild leopards lives in a mountain range where severe winter storms and prey availability fluctuate unpredictably. Why is high genetic diversity critical for the long-term survival of this species?
A. It guarantees that the overall population size will double with every generation.
B. It increases the likelihood that at least some individuals possess beneficial alleles to survive environmental changes.
C. It ensures that every single leopard will develop identical survival traits.
D. It prevents leopards from passing on any genetic mutations to their offspring.
B. It increases the likelihood that at least some individuals possess beneficial alleles to survive environmental changes.
A coastal farming county wants to reduce its carbon footprint. Local leaders are choosing between building a hydroelectric dam on their primary river or installing wind turbines on agricultural ridges. Which factor represents a disadvantage unique to the hydroelectric option?
A) Flooding of fertile land upstream and disruption of river ecosystems
B) Need for long-distance power lines to reach rural farms
C) Inability to produce electricity during nighttime hours
D) Complete reliance on daily atmospheric wind speeds
A) Flooding of fertile land upstream and disruption of river ecosystems
Which statement BEST describes the relationship between the carbon cycle and fossil fuels in terms of carbon sinks and sources
a. Fossil fuel deposits are considered carbon sources until they are re released into the atmosphere by humans, making them become carbon sinks
b. Fossil fuel deposits are always adding to the carbon cycle and are only accelerated by human activities
c. Fossil fuel deposits continuously cycle carbon between the atmosphere, underground reservoirs, maintaining energy balance.
d. Fossil fuel deposits are considered carbon sinks until they are re released into the atmosphere by humans, making them become carbon sources
d. Fossil fuel deposits are considered carbon sinks until they are re released into the atmosphere by humans, making them become carbon sources
. How does choosing natural fertilizers over synthetic ones benefit the local water supply and soil structure?
A. They reduce toxic chemical runoff into water bodies while enhancing water retention
B. They permanently prevent soil erosion by compacting topsoil
C. They eliminate all agricultural pests on contact
D. They offset greenhouse gas emissions from farm machinery
A. They reduce toxic chemical runoff into water bodies while enhancing water retention
How does extracting heavy oil differ from extracting crude oil?
A) Heavy oil comes with a significantly higher environmental cost and higher production cost.
B) Crude Oil requires zero refining before being used in motor vehicles.
C) Heavy oil produces higher net energy yields than conventional light oil.
D) Crude oil yields no air pollutants or greenhouse gases when processed.
A) Heavy oil comes with a significantly higher environmental cost and higher production cost.
In the warm sunlight of a tropical rainforest, a jaguar stalks a monkey near a cluster of blooming orchids, while a gentle breeze rustles through damp limestone cliffs nearby.
Identify the biotic factors in this scenario.
Jaguar, Monkey, Orchids
To enhance genetic variation, a small group of captive red wolves is reintroduced into an established wild red wolf territory. How will this gene flow influence the genetic traits of the red wolf population's offspring?
A. The captive red wolves will alter their own DNA sequence during their lifetime to match the wild population.
B. The overall genetic profile of future offspring generations will remain completely unchanged.
C. Interbreeding between the reintroduced and wild wolves will increase genetic variation among the offspring.
D. Successive generations will experience a complete loss of genetic diversity over time.
C. Interbreeding between the reintroduced and wild wolves will increase genetic variation among the offspring.
A key argument used by supporters of nuclear power generation is that nuclear power plants:
A) Have zero financial costs associated with plant decommissioning.
B) Require no long-term storage facilities for radioactive spent fuel.
C) Possess higher net energy ratios than all fossil fuels combined.
D) Emit no carbon dioxide (CO2) during facility operation.
D) Emit no carbon dioxide (CO2) during facility operation.
A local farming community heavily treats its soil with a potent chemical bactericide to prevent crop disease, which accidentally sterilizes the soil and decimates the local soil bacteria population. How will the loss of these bacteria directly impact the nitrogen cycle for the nearby plants?
a. Plants will absorb nitrogen directly from the atmosphere at an accelerated rate through their leaves.
b. Atmospheric nitrogen levels will drop drastically because plants can no longer produce nitrogen gas.
c. Plant growth will thrive because plants will no longer have to compete with bacteria for soil nutrients.
d. Plants will suffer from severe nitrogen deficiency because atmospheric nitrogen cannot be converted into usable nitrates by nitrogen fixation.
d. Plants will suffer from severe nitrogen deficiency because atmospheric nitrogen cannot be converted into usable nitrates by nitrogen fixation
A farm management firm is evaluating whether to switch from traditional flood irrigation to drip irrigation for their crops. Based on the specific operational trade-offs, which comparison accurately reflects the advantages and disadvantages of each system?
A. Flood irrigation optimizes water delivery by reducing evaporation losses on hot days, whereas drip irrigation uses open ditches that risk recharging local aquifers too quickly.
B. Drip irrigation is prone to high rates of atmospheric evaporation during hot weather, whereas flood irrigation distributes water directly to root systems at minimal expense.
C. Drip irrigation prevents land subsidence and coastal saltwater intrusion, whereas flood irrigation relies on expensive underground piping systems.
D. Flood irrigation provides a potential mechanism for recharging nearby aquifers despite being inefficient during high temperatures, whereas drip irrigation targets plant roots directly but requires high financial cost.
D. Flood irrigation provides a potential mechanism for recharging nearby aquifers despite being inefficient during high temperatures, whereas drip irrigation targets plant roots directly but requires high financial cost.
A regional grid operator is transitioning a power network toward 100% clean energy using offshore wind farms and large-scale solar arrays. Why is integrating powerful batteries essential for maintaining a stable power supply?
A) Solar panels and wind turbines only produce electricity during peak hours of consumer demand
B) This renewable generation fluctuates with weather conditions and time of day
C) Wind turbines and solar cells generate high-voltage alternating current that requires battery conversion
D) Energy storage systems are needed to continually cool the electrical lines and transformers
B) This renewable generation fluctuates with weather conditions and time of day
The removal of a keystone predator like the wolf from Yellowstone leads directly to what ecological disaster?
a. Plants would begin to over grow in the environment
b. Herbivore numbers would skyrocket, leading to a decimation of plant life
c. The prey of wolves (coyote) will decrease in numbers
d. There would be no change at all
b. Herbivore numbers would skyrocket, leading to a decimation of plant life
A major highway is built straight through a dense forest, cutting a population of flightless beetles into two isolated groups that can no longer cross over to mate. How does this human development impact the genetic diversity of these beetle groups over time?
A. It enhances gene flow, leading to increased genetic mixing between both sides of the highway.
B. It triggers immediate beneficial mutations that allow the beetles to cross the highway safely.
C. It causes habitat fragmentation, restricting gene flow and reducing genetic diversity within each isolated group.
D. It ensures both isolated groups remain genetically identical to the original unified population.
C. It causes habitat fragmentation, restricting gene flow and reducing genetic diversity within each isolated group.
A runaway spark from a nearby highway accident ignites a dry brushfire that sweeps through a temperate coniferous forest, destroying 60% of its trees and vegetation. How does this disturbance impact the net ecosystem exchange?
A. Atmospheric carbon fixation increases exponentially as bare soil directly absorbs CO2
B. The ecosystem shifts to a net carbon source because photosynthetic productivity drops significantly while decomposition and combustion release stored carbon
C. The ecosystem becomes a stronger net carbon sink due to ash enhancing soil photosynthesis
D. The overall net carbon exchange remains completely at zero
B. The ecosystem shifts to a net carbon source because photosynthetic productivity drops significantly while decomposition and combustion release stored carbon