Answer: D. Useful assets from nature Natural resources are materials, organisms, and environmental functions from nature that support life and human needs.
Which category includes forests, fish, and wildlife?
A Metallic minerals
B Biotic resources
C Solar radiation
D Fossil fuels
Answer: B. Biotic resources Biotic resources come from living or once-living organisms.
What do abiotic natural resources consist of?
A Organisms and populations
B Engineered materials only
C Nonliving environmental components
D Human cultural practices
Answer: C. Nonliving environmental components Abiotic resources are nonliving components such as air, water, soil, and minerals.
Which item is a renewable natural resource?
A Solar energy
B Natural gas
C Coal deposits
D Copper ore
Answer: A. Solar energy Solar energy is continually supplied by the Sun on human timescales.
Why can a renewable resource still be depleted?
A It forms underground
B Its supply never changes
C Use exceeds regeneration
D It cannot be reused
Answer: C. Use exceeds regeneration Renewable resources can decline when extraction or use outpaces natural replenishment.
Which resource usually takes geological time to form?
A Sunlight
B Tidal energy
C Wind energy
D Fossil fuels
Answer: D. Fossil fuels Fossil fuels form over geologic timescales, far slower than human use.
What is meant by a resource stock?
A Energy used per household
B Amount available now
C Rate of annual rainfall
D Products made from waste
Answer: B. Amount available now A stock is the quantity of a resource available at a particular time.
How does a resource flow differ from a stock?
A It is replenished over time
B It is a fixed inventory
C It excludes renewable resources
D It measures only market value
Answer: A. It is replenished over time A flow is replenished or produced over time, while a stock is measured at a point in time.
What does sustainable yield allow managers to determine?
A Harvest without long-term depletion
B A resource’s market price
C Total mineral wealth underground
D Maximum extraction in one year
Answer: A. Harvest without long-term depletion Sustainable yield is the level of use that can continue without undermining future availability.
When does extraction exceed a renewable resource’s capacity?
A When removal outpaces regeneration
B When use is monitored
C When demand is reduced
D When supply is naturally renewed
Answer: A. When removal outpaces regeneration A renewable resource declines when removal is faster than its ability to regenerate.
What is an open-access resource?
A A resource lacking effective exclusion
B Protected from all use
C Resource with unlimited supply
D Fossil fuels
Answer: A. A resource lacking effective exclusion Open access means users cannot be effectively excluded, which can create management challenges.
Why can unmanaged shared resources be overused?
A Users share every benefit equally
B Supply always exceeds demand
C Private gains, shared costs
D Rules prevent all extraction
Answer: C. Private gains, shared costs Users may capture individual gains while spreading depletion costs across the group.
Which approach can help communities manage common resources?
A Ban all local knowledge
B Unrestricted access for all
C Locally agreed rules and monitoring
D One-time assessment only
Answer: C. Locally agreed rules and monitoring Clear local rules, monitoring, and participation can support durable common-resource management.
What does carrying capacity estimate?
A Annual rainfall in a watershed
B Number of resource categories
C Population an environment can sustain
D Total minerals beneath a region
Answer: C. Population an environment can sustain Carrying capacity is the population size an environment can support under stated conditions.
Why conduct a natural-resource inventory?
A Replace environmental monitoring
B Map quantity, condition, and location
C Guarantee future resource abundance
D Set prices for every commodity
Answer: B. Map quantity, condition, and location An inventory records the amount, location, and condition of resources for planning.
How is resource efficiency commonly improved?
A More waste per product
B More output per resource unit
C Shorter product lifetimes
D Higher extraction losses
Answer: B. More output per resource unit Resource efficiency seeks to deliver more value or output from each unit of material or energy.
Which model prioritizes repair, reuse, and recycling?
A Linear extraction model
B Circular economy
C Open-access harvesting
D Single-use production
Answer: B. Circular economy A circular economy keeps materials in use through strategies such as repair, reuse, and recycling.
In natural-capital accounting, what is natural capital?
A Annual sales of minerals
B A country’s factory equipment
C A household’s savings balance
D Nature’s stock of assets
Answer: D. Nature’s stock of assets Natural capital refers to stocks of natural assets that provide resources and ecosystem services.
Which item is a provisioning ecosystem service?
A Flood protection by wetlands
B Recreation in a park
C Food from cultivated crops
D Carbon storage in forests
Answer: C. Food from cultivated crops Provisioning services include material products such as food, freshwater, and timber.
What is a central goal of conservation?
A Permanent removal of local people
B Sustainable use and protection
C Conversion of every habitat
D Maximum extraction today
Answer: B. Sustainable use and protection Conservation protects natural systems while supporting sustainable use where appropriate.
How does preservation generally differ from conservation?
A Maximizes short-term harvest
B Requires mineral extraction
C Limits direct human use
D Replaces natural processes
Answer: C. Limits direct human use Preservation generally emphasizes protecting nature with minimal direct human use or disturbance.
Which principle considers impacts on future generations?
A Intergenerational equity
B Market equilibrium
C Comparative advantage
D Ecological succession
Answer: A. Intergenerational equity Intergenerational equity asks that present decisions consider effects on people in the future.
Why can mineral reserves change over time?
A Mining removes all uncertainty
B Minerals renew each season
C Geology stops changing
D Technology and prices can change
Answer: D. Technology and prices can change Reserves are economically recoverable under current conditions, which can change with technology, costs, and prices.
What is an aquifer?
A A layer of dry topsoil
B A surface-water reservoir
C A pipeline for irrigation
D Permeable rock storing groundwater
Answer: D. Permeable rock storing groundwater An aquifer is permeable rock or sediment that stores and transmits groundwater.
How does groundwater recharge occur?
A Water infiltrates into aquifers
B Water evaporates from oceans
C Rivers stop flowing
D Minerals dissolve underground
Answer: A. Water infiltrates into aquifers Recharge occurs when water moves from the land surface into groundwater-bearing formations.
What may happen when pumping exceeds recharge?
A Soils gain more organic matter
B River flows always increase
C Water tables decline
D Aquifers refill immediately
Answer: C. Water tables decline Withdrawals above recharge can lower groundwater levels and reduce future availability.
Which farming practice slows erosion on slopes?
A Repeated bare tillage
B Downhill furrows
C Removing ground cover
D Contour ploughing
Answer: D. Contour ploughing Contour ploughing follows the land’s contours and slows runoff on slopes.
What helps protect bare soil from erosion?
A Removing crop residues
B Leaving slopes uncovered
C Cover crops and mulch
D Frequent deep ploughing
Answer: C. Cover crops and mulch Cover crops and mulch shield soil from raindrop impact and slow water runoff.
Why can irrigated fields become saline?
A Rain removes all salts
B Evaporation leaves salts behind
C Roots create new minerals
D Drainage exports every nutrient
Answer: B. Evaporation leaves salts behind Evaporation and inadequate drainage can leave dissolved salts in irrigated soils.
How do healthy watersheds support water supplies?
A Prevent groundwater recharge
B Reduce erosion and filter runoff
C Remove all streamside vegetation
D Increase sediment in reservoirs
Answer: B. Reduce erosion and filter runoff Healthy watershed cover can reduce erosion and help protect water quality.
What role can wetlands play in resource management?
A Remove groundwater recharge
B Store floodwater and filter pollutants
C Increase soil erosion
D Accelerate all surface runoff
Answer: B. Store floodwater and filter pollutants Wetlands can store water, slow floods, and filter some pollutants.
Which energy source is renewable on human timescales?
A Coal
B Solar power
C Petroleum
D Uranium ore
Answer: B. Solar power Solar power is replenished continuously on human timescales.
Why are fossil fuels nonrenewable?
A They cannot release energy
B Formation takes geological timescales
C Their use creates sunlight
D They are never extracted
Answer: B. Formation takes geological timescales Fossil fuels form over very long geologic periods compared with the pace of extraction.
What environmental harm can mining cause?
A Permanent water purification
B Habitat loss and polluted runoff
C Guaranteed soil formation
D Higher native biodiversity
Answer: B. Habitat loss and polluted runoff Mining can disturb habitats and create runoff or waste that affects water and land.
How does metal recycling conserve resources?
A Reduces demand for new ore
B Stops all mining impacts
C Makes metals biologically renewable
D Creates unlimited mineral deposits
Answer: A. Reduces demand for new ore Recycling metal can reduce demand for newly extracted ores and associated processing.
What does a life-cycle assessment evaluate?
A A company’s yearly revenue
B Only a product’s selling price
C Only factory energy use
D Impacts across a product’s life
Answer: D. Impacts across a product’s life Life-cycle assessment considers environmental impacts across stages such as raw-material supply, production, use, and disposal.
Why can dams alter river ecosystems?
A They change flow and sediment
B They create natural minerals
C They stop evaporation globally
D They eliminate upstream water use
Answer: A. They change flow and sediment Dams can alter flow timing, sediment movement, and aquatic habitat conditions.
In fisheries, what does maximum sustainable yield describe?
A Highest sustainable catch over time
B A guaranteed annual harvest
C Total fish in one season
D Largest catch in one day
Answer: A. Highest sustainable catch over time Maximum sustainable yield estimates the largest long-term catch that can be maintained under specified conditions.
When does overfishing threaten a fish stock?
A Catch records are published
B Fish move between habitats
C Fishing occurs in deep water
D Catch exceeds population replacement
Answer: D. Catch exceeds population replacement A fish stock declines when removals consistently exceed reproduction and recruitment.
What guides sustainable forest management?
A Maximum harvest every season
B Complete exclusion of all communities
C Multiple values for future generations
D Timber output alone
Answer: C. Multiple values for future generations Sustainable forest management balances environmental, social, and economic forest values for present and future generations.
How can selective harvesting reduce forest impacts?
A Retain seed trees and habitat
B Remove all deadwood
C Clear every tree at once
D Harvest during every season
Answer: A. Retain seed trees and habitat Selective harvesting can retain seed sources and habitat structures while limiting disturbance.
What does integrated water resources management coordinate?
A Water, land, related resources
B Only hydropower generation
C Only municipal water prices
D Separate plans without coordination
Answer: A. Water, land, related resources IWRM coordinates water, land, and related resources to support equitable and sustainable outcomes.
Why does natural-resource demand differ among regions?
A Population, income, and consumption patterns
B Rock color only
C Latitude alone
D A single global price
Answer: A. Population, income, and consumption patterns Resource demand reflects population, consumption, production systems, technology, and economic conditions.
What should managers consider when extraction affects customary lands?
A A distant region’s preferences
B Community rights and participation
C Only export revenue
D Only equipment costs
Answer: B. Community rights and participation Fair resource decisions consider affected communities’ rights, knowledge, and meaningful participation.
When is an environmental impact assessment useful?
A Only after a project closes
B After impacts become irreversible
C Before project approval decisions
D Only during market trading
Answer: C. Before project approval decisions An environmental impact assessment helps identify likely effects before decisions authorize a project.
What does the precautionary principle support?
A Ignoring plausible risks
B Removing all scientific review
C Waiting for complete damage
D Preventive action under uncertainty
Answer: D. Preventive action under uncertainty The precautionary principle supports proportionate preventive measures when there is credible risk despite scientific uncertainty.
Why monitor resource use over time?
A Guarantee constant demand
B Replace all local participation
C Avoid updating inventories
D Detect depletion and adjust management
Answer: D. Detect depletion and adjust management Monitoring reveals trends and helps managers adjust actions when resource conditions change.
What does a material footprint estimate?
A Annual rainfall stored underground
B Only construction materials used locally
C Materials extracted for final demand
D Only household garbage weight
Answer: C. Materials extracted for final demand A material footprint estimates global material extraction associated with final demand.
What does a water footprint measure?
A Only water in rivers
B Water stored in deep aquifers
C Annual rainfall over forests
D Freshwater used across production
Answer: D. Freshwater used across production A water footprint accounts for freshwater used directly and indirectly to produce goods or services.
What makes resource management equitable?
A Equal extraction regardless of need
B Private control without accountability
C Use without ecological limits
D Fair access and shared benefits
Answer: D. Fair access and shared benefits Equitable management considers fair access, distribution of benefits, and participation alongside ecological limits.