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All fields Software Mathematics Physics Chemistry Biology Engineering Astronomy Environmental Other Environmental Environmental groups

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Search the community's STEM library — free to study, yours to make your own.

Environmental

Geology, climate and the environment on openstem — flashcards, notes, quizzes, plots and sketches shared by the community. Study free, or clone anything into your library.

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Environmental: explore STEM content (page 25 of 27) · openstem

Collection4 items

01Environmental · L2 · Sustainable Agriculture

02Environmental · L2 · Sustainable Agriculture

03Environmental · L2 · A Multi-Year Crop Rotation Cycle

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Environmental

Environmental · L2 · Sustainable Agriculture

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Environmental · L2 · Sustainable Agriculture

Flashcards9 cards

What enzyme catalyses biological nitrogen fixation, and what is its ATP cost?1 / 9

Nitrogenase, a two-component metalloenzyme (Fe protein + MoFe protein) found in diazotrophs such as Rhizobium and free-living Azotobacter. It reduces N₂ to ammonia at enormous energetic cost — roughly 16 ATP are hydrolysed per N₂ fixed — which is why the reaction is confined to specialised, oxygen-protected cells (e.g. root nodules, or heterocysts in cyanobacteria, since nitrogenase is irreversibly inactivated by O₂).

Environmental

Environmental · L4 · Environmental Microbiology

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Environmental · L4 · Environmental Microbiology

Note~172 words · 1 min

What Is the Difference? Weather is what the atmosphere is doing right now or over the next few days — today's temperature, whether it is raining, how strong the wind is. Climate is the long-term pattern of weather in a place, measured over

Environmental

Environmental · L2 · Weather vs Climate

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Environmental · L2 · Weather vs Climate

Note~445 words · 2 min

Solid Waste Management Engineering Municipal solid waste (MSW) — everything from food scraps to packaging to demolition debris that households and businesses discard — has to go somewhere. Engineering that 'somewhere' safely, and increasing

Environmental

Environmental · L4 · Solid Waste Management Engineering

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Environmental · L4 · Solid Waste Management Engineering

Collection4 items

01Environmental · L2 · Biodiversity & Species Loss

02Environmental · L2 · Biodiversity & Species Loss

03Environmental · L2 · Five Drivers of Species Decline

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Environmental

Environmental · L2 · Biodiversity & Species Loss

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Environmental · L2 · Biodiversity & Species Loss

Quiz5 questions

What does the probit transform assume about the distribution of individual organism tolerances?

ATolerances are log-normally distributed across the populationBAll individuals have identical toleranceCTolerances follow a uniform distributionDTolerance has no relationship to dose

Environmental

Environmental · L5 · Quantitative Ecotoxicology

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Environmental · L5 · Quantitative Ecotoxicology

Collection4 items

01Environmental · L2 · Environmental Justice

02Environmental · L2 · Environmental Justice

03Environmental · L2 · How Unequal Pollution Exposure Takes Shape

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Environmental

Environmental · L2 · Environmental Justice

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Environmental · L2 · Environmental Justice

Flowchart9 objects

Environmental

Environmental · L3 · How a Climate Model Produces a Projection

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Environmental · L3 · How a Climate Model Produces a Projection

Flowchart7 objects

Environmental

Environmental · L3 · Renewable Energy Technologies · flowchart

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Environmental · L3 · Renewable Energy Technologies · flowchart

Note~312 words · 2 min

Capacity Factor: How Much of the 'Nameplate' You Actually Get A power plant's rated ('nameplate') capacity is the maximum output it can produce under ideal conditions. In practice, no plant runs at that maximum all the time — capacity facto

Environmental

Environmental · L3 · Renewable Energy Technologies

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Environmental · L3 · Renewable Energy Technologies

Collection4 items

01Environmental · L3 · The Nitrogen Cycle

02Environmental · L3 · The Nitrogen Cycle

03Environmental · L3 · The Nitrogen Cycle

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Environmental

Environmental · L3 · The Nitrogen Cycle

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Environmental · L3 · The Nitrogen Cycle

Flashcards8 cards

What is LD50, and how is it determined experimentally?1 / 8

LD50 (lethal dose, 50%) is the dose of a substance that kills 50% of a test population under specified exposure conditions, usually expressed in mg substance per kg body weight. It's determined by exposing groups of test organisms to a range of doses and fitting a dose-response curve to find the dose at which mortality crosses the 50% mark. A LOWER LD50 means a MORE toxic substance.

Environmental

Environmental · L4 · Environmental Toxicology

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Environmental · L4 · Environmental Toxicology

Quiz4 questions

Which part of Earth's system holds the most carbon in the active carbon cycle?

AThe atmosphereBLiving plants and animalsCThe oceansDSoil

Environmental

Environmental · L2 · Carbon Cycle, Biomes, and Watersheds

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Environmental · L2 · Carbon Cycle, Biomes, and Watersheds

Collection4 items

01Environmental · L5 · Atmospheric Boundary Layer Physics

02Environmental · L5 · Boundary Layer Turbulence and Monin-Obukhov Similarity Theory

03Environmental · L5 · Diurnal Boundary-Layer Stability Cycle

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Environmental

Environmental · L5 · Atmospheric Boundary Layer Physics

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Environmental · L5 · Atmospheric Boundary Layer Physics

Note~251 words · 1 min

The Ocean as a CO₂ Sponge The ocean has absorbed roughly a quarter to a third of all the CO₂ humans have emitted since the industrial revolution — a service that has slowed atmospheric warming, but at a chemical cost to the water itself. Th

Environmental

Environmental · L3 · Ocean Acidification

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Environmental · L3 · Ocean Acidification

Flowchart5 objects

Environmental

Environmental · L1 · Wildlife Rescue & Rehabilitation Quiz · flowchart

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Environmental · L1 · Wildlife Rescue & Rehabilitation Quiz · flowchart

Flowchart5 objects

Environmental

Environmental · L2 · Urban Heat Island Effect · flowchart

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Environmental · L2 · Urban Heat Island Effect · flowchart

Flowchart11 objects

Environmental

Environmental · L3 · Glacier Mass Balance: Accumulation to Sea-Level Rise

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Environmental · L3 · Glacier Mass Balance: Accumulation to Sea-Level Rise

Note~367 words · 2 min

Two Kinds of Currents, Two Different Drivers Ocean water is always moving, but the forces behind that motion differ sharply depending on depth. Surface currents, in the upper few hundred meters, are driven mainly by wind dragging across the

Environmental

Environmental · L2 · Ocean Currents & Marine Ecosystems

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Environmental · L2 · Ocean Currents & Marine Ecosystems

Quiz5 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

Environmental · L1 · Plastic Alternatives Quiz

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Environmental · L1 · Plastic Alternatives Quiz

Flowchart11 objects

Environmental

Environmental · L3 · Urban Heat Island: From Surface Properties to Elevated Temperature

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Environmental · L3 · Urban Heat Island: From Surface Properties to Elevated Temperature

Quiz5 questions

In the NDVI formula (NIR - Red)/(NIR + Red), why does healthy vegetation give a HIGH value?

AHealthy leaves absorb NIR and reflect red stronglyBHealthy leaves reflect NIR strongly (leaf structure) while absorbing red strongly (chlorophyll for photosynthesis)CNDVI has nothing to do with reflectanceDHealthy leaves reflect both NIR and red equally

Environmental

Environmental · L4 · Remote Sensing & GIS — 5 Q

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Environmental · L4 · Remote Sensing & GIS — 5 Q

Collection3 items

01Environmental · L5 · Atmospheric Chemistry & Chemical Transport Modeling

02Environmental · L5 · Atmospheric Chemistry & Chemical Transport Modeling

03Environmental · L5 · Atmospheric Chemistry & Chemical Transport Modeling — 6 Q

Environmental

Environmental · L5 · Atmospheric Chemistry & Chemical Transport Modeling

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Environmental · L5 · Atmospheric Chemistry & Chemical Transport Modeling

Quiz6 questions

What did May's 1972 analysis show about randomly structured community matrices?

AComplexity (higher S, C, or sigma) always increases stabilityBStability becomes progressively less likely as species richness, connectance, or interaction strength increaseCRandom networks are always stable regardless of sizeDConnectance has no effect on stability

Environmental

Environmental · L5 · Ecological Network Analysis & Food Web Stability — 6 Q

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Environmental · L5 · Ecological Network Analysis & Food Web Stability — 6 Q

Flowchart19 objects

Environmental

Environmental · L4 · The Wastewater Treatment Train

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Environmental · L4 · The Wastewater Treatment Train

Collection4 items

01Environmental · L3 · Life-Cycle Assessment (LCA)

02Environmental · L3 · Life-Cycle Assessment (LCA)

03Environmental · L3 · The Five Stages of a Life-Cycle Assessment

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Environmental

Environmental · L3 · Life-Cycle Assessment (LCA)

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Environmental · L3 · Life-Cycle Assessment (LCA)

Note~299 words · 1 min

Remote Sensing & GIS: From Pixels to Maps Remote sensing captures environmental information from a distance — typically satellites or aircraft — while GIS (Geographic Information Systems) stores, analyses, and visualises that information al

Environmental