A species whose removal would cause the whole ecosystem to collapse
What is a keystone species?
The maximum population size of a species that an environment can sustain indefinitely.
What is carrying capacity?
Bonus (50pts): What letter represents this on a graph?
The layer of the atmosphere where all weather occurs?
What is the troposphere?
The mechanical, chemical, or biological breakdown of rock
What is weathering?
A practice of planting multiple different crops in the same field in a planned sequence to improve soil health.
What is crop rotation?
The concept that resources that are open access and shared will inevitably be degraded by individuals acting in their own self-interest.
What is Tragedy of the commons?
Bonus (+50 pts) Give an example!
The typical percentage of energy transferred from one trophic level to the next
What is 10%?
A reproductive strategy where organisms produce few offspring, provide parental care, & mature slowly.
What are K-selected species?
This colorless, odorless gas is good in the stratosphere but bad in the troposphere.
What is Ozone?
Bonus (+100): What is the chemical formula for ozone?
What is LOAM
A method of forest harvesting where all trees in a given area are removed, regardless of size.
What is clear cutting?
This aquifer is being depleted in the midwestern region of the US
What is the Ogallala aquifer?
Bonus (+100 pts): What human activity uses the most amount of water?
The measure of a variety of habitats, communities, & ecological processes within a given area?
What is ecosystem diversity?
The number of individuals of a population per unit area
What is population density?
Bonus (100 pts): What is the formula for calculating this?
The atmospheric cell that occurs between 30-60 degrees N or S of the equator?
What are Ferrell cells?

The layer of soil typically called the "topsoil" (has the most organic matter)
What is the A horizon?
This is where an urban area grows outward instead of up.
What is urban sprawl?
This is when large habitats are broken up into smaller, isolated areas?
What is habitat fragmentation?
Bonus (+100 pts): Name a realistic solution for this
The process by which an excess of nutrients in a body of water eventually leads to oxygen depletion
What is eutrophication?
The type of population growth curve that shows a slow start, acceleration, & the leveling off near carrying capacity
What is an S-curve?
Bonus (+50 pts) if you say logistic growth
A large-scale weather pattern characterized by a warmer than usual sea surface temperature in the central and eastern equatorial pacific ocean
What is El Nino?
Bonus: (+100 pts): What is the acronym that encompasses both El Nino and La Nina as a whole system?
The large-scale geologic process where a portion of Earth's crust slides beneath another section, often creating trenches and volcanoes.
What is subduction?
Bonus (+100 pts): What geological feature is created at a subduction zone between 2 oceanic plates? (besides trenches/volcanoes)
The principle that resources should be managed so that they can be used indefinitely without depleting them
What is sustainability?
Bonus (+50 pts): Give an example of sustainability that we learned.
It is important to have biodiversity in a time of global climate change because it allows for ecosystems to have ___________ which allows them to bounce back quicker after disturbance?
What is resilience?
Bonus (+50 pts): Name a type of ecological disturbance
The total mass of organic matter in a given area at a given time
What is biomass?
The predictable changes in age structure, fertility, & mortality rates that occur as a country move from pre-industrial to developed
What is demographic transition?
The phenomenon where rising air cools & condenses, causing precipitation on the windward side of a mountain range and arid conditions on the leeward side?
What is the "Rain Shadow Effect"?
Bonus: (+50 pts) Name a location on Earth that is a good example of this.
This is the "leftovers" or unwanted rock in a mining operation
What is overburden or tailings?
This is how we are able to mass produce meat in a cheap and efficient way
What are CAFO's?
Bonus (+50): What is the fishing version of this system?
This is a type of mining waste that comes from the reaction of sulfide materials and air/water when exposed.
What is acid mine drainage?