Details Title: erk Description: let Total Flash Cards: 25 Created: 01/22/2009 11:17:57		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Agriculture Flashcards
Cards in this set: Term           System Definition         Set of components that function together as a whole Term       Ecological community Definition      a set of interacting species that occur in the same place. or a set of species found in an area, whether or not they are interacting Term       Ecosystem Definition       a particular system that includes the ecological system and its non-living environments all ecosystems have in common the flow of energy and the cycling of chemical elements Term         Negative Feedback Definition       self-regulating, or stabiblizing; it usually keeps a system in a relatively constand conidition Term         Steady state or dynamic equilibrium Definition         When there is no net change in size of the storage compartment and the system is relatively stable. Term       Biogeochemical cycle Definition         The cycling of a chemical element through the biosphere Term       (define) The big six Definition       Macronutrients  that form the basic building blocks of life Term       The big six (elements) Definition   Carbon Hydrogen Nitrogen Oxygen phosphorous Sulfur Term       Convergent plate boundary Definition        Occurs when plates collide Term       Transform fault boundary Definition       Occurs when one plate slides past another. Term       Metal and non-metal Definition       The calcium cycle is typical of a metallic elemt, and the sulfur cycle is typical of a nonmetallic element Term         Total world population graphed Definition       Logistics curve- normal for populations graphs Population size Time Term           Demography Definition     Age structure Growth rate Demographic transition Total fertility Population momentum Term           Maximum lifetime: Definition         The generically determined maximum possible age to which an individual of a species can life Term           Precautionary pricinciple Definition       When there is a serious threat we should not wait for scientific proof beofre taking cost effective, precautionary steps to prevent potentialharm to the enviorment it is proactive rather than reactive Term         Species Definition         All individuals that are capable of interbreeding Made up of populations Term            death Demographic transition   Definition     Stage 1: Stable low- the birth rate declines Stage 2: growing-high growth rate Stage 3:Stable greater-birth rate drops towards death rate, so growth rate declines Stage4: Growing- Stage 5:Stable greater Term         Four paths of Biogeochemical cycles Definition       Atmosphere Lithosphere Hydrosphere Biosphere Term         The Carbon cycle: unanswered issues Definition        The missing carbon sink---where it is? Not missing just unidentified- missing carbon sink The unidentified sink is growing Term         Species Definition         All individuals that are capable of interbreeding Made up of populations Term         A brief hisotry of human population growth Definition     Hunters and gatherers Early, pre-industrial agriculture Machine age The modern era- Rate of population has slowed in wealthy nations but ocntinues to increase rapidly in poorer, less developed nations Term         Overshoot Definition       The idea that we surpass carrying capacity then the population collapse and carrying capacity is reduced. It has changed a bit due to technology Term           Management strategies for the commons- Definition       Working in small groups Establish rules and laws at Local levels Economic incentives and mediation Education Term         The nitrogen cycle Definition     Cycle responsible for moving important nitrogen components through the biosphere and other earth systems Extremely important because nitrogen is required by all living things Term           Intellectual standards for critical thinking Definition Clarity Accuracy Precision Relevance Depth Logic Significance Fairness