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OpenStem
@openstem · Joined Jul 2026
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Quiz5 questions
Why is biking considered a very clean way to travel?
AIt produces no exhaust and burns no fuelBIt is always the fastest optionCIt runs on gasoline like a carDIt requires an electric battery
Environmental · L1 · Clean Transportation Quiz
@openstem
Environmental · L1 · Clean Transportation QuizQuiz5 questions
What does 'single-use plastic' mean?
APlastic meant to be used once, then thrown awayBPlastic that can never be thrown awayCPlastic that is always recycledDA plastic that dissolves in water instantly
Environmental · L1 · Plastic Alternatives Quiz
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Environmental · L1 · Plastic Alternatives QuizQuiz5 questions
What is a wildlife rescue center?
AA zoo where animals are kept for entertainmentBA place that cares for injured, sick, or orphaned wild animalsCA pet shopDA farm for raising livestock
Environmental · L1 · Wildlife Rescue & Rehabilitation Quiz
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Environmental · L1 · Wildlife Rescue & Rehabilitation QuizQuiz3 questions
Which type of rock is formed when melted rock cools and hardens?
ASedimentaryBMetamorphicCIgneousDFossil
Environmental · L2 · Rocks, Layers, and Climate
@openstem
Environmental · L2 · Rocks, Layers, and ClimateQuiz4 questions
Which part of Earth's system holds the most carbon in the active carbon cycle?
AThe atmosphereBLiving plants and animalsCThe oceansDSoil
Environmental · L2 · Carbon Cycle, Biomes, and Watersheds
@openstem
Environmental · L2 · Carbon Cycle, Biomes, and WatershedsQuiz5 questions
Which trophic level captures energy directly from sunlight?
APrimary consumersBProducersCSecondary consumersDDecomposers
Environmental · L2 · Ecosystems & Food Webs
@openstem
Environmental · L2 · Ecosystems & Food WebsQuiz5 questions
Which of these is the definition of biodiversity?
AThe total number of trees in a forestBThe variety of life — genetic, species, and ecosystem diversity — in a placeCThe average temperature of a regionDThe number of national parks in a country
Environmental · L2 · Biodiversity & Species Loss
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Environmental · L2 · Biodiversity & Species LossQuiz5 questions
What physically happens inside a silicon solar cell when sunlight hits it?
AThe silicon melts slightly and releases heat energyBPhotons knock electrons loose, which flow as a direct currentCSunlight spins a tiny internal turbineDThe panel reflects light to a central mirror that boils water
Environmental · L2 · How Renewable Energy Systems Work
@openstem
Environmental · L2 · How Renewable Energy Systems WorkQuiz5 questions
What do coal, oil, and natural gas all have in common in how they form?
AThey are all manufactured in factoriesBThey all form from the buried remains of ancient organisms under heat and pressureCThey all form from volcanic ashDThey are all mined from meteorites
Environmental · L2 · Fossil Fuels & Nonrenewable Resources
@openstem
Environmental · L2 · Fossil Fuels & Nonrenewable ResourcesQuiz5 questions
Which of these is an example of a primary air pollutant?
AGround-level ozoneBCarbon monoxide from a car's exhaustCPhotochemical smog hazeDNone of these are pollutants
Environmental · L2 · Air Pollution: Sources & Smog
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Environmental · L2 · Air Pollution: Sources & SmogQuiz5 questions
Fertiliser washing off a farm field into a nearby stream is an example of what kind of pollution source?
APoint sourceBNonpoint sourceCNeither — fertiliser is not a pollutantDAtmospheric source
Environmental · L2 · Water Pollution & Treatment
@openstem
Environmental · L2 · Water Pollution & TreatmentQuiz5 questions
What does a materials recovery facility (MRF) do?
ABurns all recyclables for energyBSorts mixed recyclables into clean, single-material streams for reprocessingCManufactures new plastic from crude oilDBuries recyclables in a landfill
Environmental · L2 · Recycling Systems & Materials
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Environmental · L2 · Recycling Systems & MaterialsQuiz5 questions
Why is topsoil considered a resource worth actively protecting, rather than something that can just be replaced?
ABecause topsoil is expensive to purchaseBBecause it takes centuries to form naturally, far slower than it can erode awayCBecause topsoil is illegal to disturbDBecause it contains no organic matter
Environmental · L2 · Soil Conservation & Erosion Control
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Environmental · L2 · Soil Conservation & Erosion ControlQuiz5 questions
What happens at a convergent plate boundary?
ATwo plates pull apart, creating new crustBTwo plates slide sideways past each otherCTwo plates collide, and one may subduct beneath the otherDPlates stop moving entirely
Environmental · L2 · Earthquakes & Plate Boundaries
@openstem
Environmental · L2 · Earthquakes & Plate BoundariesQuiz5 questions
What does the stratospheric ozone layer mainly protect life on Earth from?
AMeteor impactsBMost of the Sun's ultraviolet-B (UV-B) radiationCAcid rainDVolcanic ash
Environmental · L2 · The Ozone Layer & UV Protection
@openstem
Environmental · L2 · The Ozone Layer & UV ProtectionQuiz5 questions
What distinguishes an 'invasive' species from a species that is merely 'non-native'?
AInvasive species are always larger in sizeBInvasive species spread aggressively and cause real ecological or economic harm, unlike most non-native speciesCThere is no real difference between the two termsDInvasive species can only be plants, never animals
Environmental · L2 · Invasive Species
@openstem
Environmental · L2 · Invasive SpeciesQuiz5 questions
What mainly drives surface ocean currents?
AWindBEarth's magnetic fieldCVolcanic activityDMoonlight
Environmental · L2 · Ocean Currents & Marine Ecosystems
@openstem
Environmental · L2 · Ocean Currents & Marine EcosystemsQuiz5 questions
What is the main purpose of crop rotation?
ATo make harvesting more convenient for machineryBTo restore depleted soil nutrients and break pest and disease cyclesCTo grow the same crop faster each yearDTo eliminate the need for any water at all
Environmental · L2 · Sustainable Agriculture
@openstem
Environmental · L2 · Sustainable AgricultureQuiz5 questions
What condition allows a glacier to form in the first place?
ASnowfall exceeding melting, year after yearBA single very heavy snowstormCRapid melting of existing snowDWarm ocean currents nearby
Environmental · L2 · Glaciers & Ice Sheets
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Environmental · L2 · Glaciers & Ice SheetsQuiz5 questions
What primarily defines a region as a desert?
AVery high daytime temperaturesBLow annual precipitation, roughly under 25 cm per yearCSandy soilDLack of any animal life
Environmental · L2 · Desert Ecosystems & Adaptations
@openstem
Environmental · L2 · Desert Ecosystems & AdaptationsQuiz5 questions
What is the defining feature of a wetland?
ALand saturated with water long enough to support water-adapted plants and soilsBAny area that floods once a centuryCLand located directly next to the oceanDAny forest with a nearby river
Environmental · L2 · Wetland Ecosystems
@openstem
Environmental · L2 · Wetland EcosystemsQuiz5 questions
What is a coral polyp?
AA type of algaeBA tiny animal that builds a calcium carbonate skeletonCA rock formation with no living componentDA species of reef fish
Environmental · L2 · Coral Reef Ecology
@openstem
Environmental · L2 · Coral Reef EcologyQuiz5 questions
What does insulation do to reduce a building's energy use?
AIt slows heat conduction through walls, roofs, and floorsBIt generates its own electricityCIt filters the air inside a buildingDIt blocks all sound from entering
Environmental · L2 · Energy Efficiency in Buildings
@openstem
Environmental · L2 · Energy Efficiency in BuildingsQuiz5 questions
What does a carbon footprint measure?
AOnly the CO₂ released by a car's engineBThe total greenhouse gases a person, household, or activity is responsible for, direct and indirectCThe physical size of a person's homeDThe amount of trash a household produces
Environmental · L2 · Carbon Footprint
@openstem
Environmental · L2 · Carbon FootprintQuiz5 questions
Which three factors are typically used to compare energy sources?
ACost, emissions, and reliabilityBColor, weight, and tasteCOnly cost mattersDOnly emissions matter
Environmental · L2 · Comparing Energy Sources
@openstem
Environmental · L2 · Comparing Energy SourcesQuiz5 questions
What is the urban heat island effect?
ACities being noticeably warmer than the surrounding rural areasBA rare weather event that only happens once a decadeCRural areas being warmer than nearby citiesDAn effect limited only to coastal cities
Environmental · L2 · Urban Heat Island Effect
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Environmental · L2 · Urban Heat Island EffectQuiz5 questions
What is the water table?
AThe upper boundary of the zone where the ground is fully saturated with waterBA man-made structure that holds groundwaterCThe deepest point any aquifer reachesDA synonym for a river or lake
Environmental · L2 · Groundwater & Aquifers
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Environmental · L2 · Groundwater & AquifersQuiz5 questions
What is the single largest global driver of deforestation today?
AAgricultural expansion, especially cattle ranching and crops like soy and palm oilBWildfires caused entirely by lightningCVolcanic eruptionsDRecreational camping
Environmental · L2 · Deforestation: Causes & Effects
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Environmental · L2 · Deforestation: Causes & EffectsQuiz5 questions
What is habitat fragmentation?
AThe breaking up of a large, continuous habitat into smaller, isolated patchesBA natural process that only happens during volcanic eruptionsCThe expansion of a habitat into new, larger territoryDA term for seasonal animal migration
Environmental · L2 · Wildlife Corridors & Habitat Fragmentation
@openstem
Environmental · L2 · Wildlife Corridors & Habitat FragmentationQuiz5 questions
What valuable materials can be recovered from e-waste through 'urban mining'?
AGold, silver, copper, and rare earth elementsBOnly plasticCWaterDNothing of value can be recovered
Environmental · L2 · Electronic Waste
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Environmental · L2 · Electronic Waste