enviromental

Question 1

dead zones

Answer 1

region of water depleted of oxygen

Question 2

hypoxia

Answer 2

low concentrations of dissolved oxygen in water

Question 3

ecosystem

Answer 3

al organisms and nonliving entities that occur and interact in a particular area at the same time

Question 4

positive feedback loop

Answer 4

it drives a system toward one extreme or another

Question 5

negative feedback loop

Answer 5

output from a system moving in one direction acting as an input

Question 6

homeostasis

Answer 6

a system that maintains stable internal confitions

Question 7

emergent properties

Answer 7

system characteristics are not evident in the components alone

Question 8

eutrophication

Answer 8

the process of nutrient over-enrichment

Question 9

net primary productivity

Answer 9

energy remaining after respiration which is used to generate biomass

Question 10

macronutrients

Answer 10

nutrients needed in larger amounts

Question 11

micronutrients

Answer 11

nutrients needed in smaller amounts

Question 12

ecotones

Answer 12

transitional zones between two ecosystems

Question 13

mosaic

Answer 13

landscapes that are spread spatially in complex patterns

Question 14

pool of reservoir

Answer 14

where nutrients reside for varying amounts of times

Question 15

flux

Answer 15

rate at which materials move between pools

Question 16

residence time

Answer 16

how long nutrient stays in the pool or reservoir

Question 17

source

Answer 17

a pool that releases more nutrients that it accepts

Question 18

sink

Answer 18

a pool that accepts more nutrients that it releases