Terms : Hide Images
| 7746183022 | Biosphere | The region of our planet where life resides, the combination of all ecosystems on Earth | 0 | |
| 7746183023 | Producer | An organism that uses the energy of the Sun to produce usable forms of energy (also known as autotroph) |  | 1 |
| 7746183024 | Photosynthesis | The process by which producers use solar energy to convert carbon dioxide and water into glucose | 2 | |
| 7746183025 | Cellular respiration | The process by which cells unlock the energy of chemical compounds | 3 | |
| 7746183026 | Consumer | An organism that is incapable of photosynthesis and must obtain its energy by consuming other organisms (also known as heterotroph) |  | 4 |
| 7746183027 | Herbivore | A consumer that eats producers (also known as Primary consumer) |  | 5 |
| 7746183028 | Carnivore | A consumer that eats other consumers |  | 6 |
| 7746183029 | Secondary consumer | A carnivore that eats primary consumers |  | 7 |
| 7746183030 | Tertiary consumer | A carnivore that eats secondary consumers |  | 8 |
| 7746183031 | Trophic levels | The successive levels of organisms consuming one another |  | 9 |
| 7746183032 | Food web | A complex model of how energy and matter move between trophic levels |  | 10 |
| 7746183033 | Scavenger | An organism that consumes dead animals |  | 11 |
| 7746183034 | Detritivore | An organism that specializes in breaking down dead tissues and waste products into smaller particles |  | 12 |
| 7746183035 | Decomposers | The fungi and bacteria that complete the breakdown process by converting organic matter into small elements and molecules that can be recycled back into the ecosystem. |  | 13 |
| 7746183036 | Gross Primary Productivity | The total amount of solar energy that producers in an ecosystem capture via photosynthesis over a given amount of time | 14 | |
| 7746183037 | Net Primary Productivity | The energy captured by produces in an ecosystem minus the energy producers respire | 15 | |
| 7746183038 | Biomass | The total mass of all living matter in a specific area | 16 | |
| 7746183039 | Standing crop | The amount of biomass present in an ecosystem at a particular time | 17 | |
| 7746183040 | Ecological efficiency | The proportion of consumed energy that can be passed from one trophic level to another | 18 | |
| 7746183041 | Trophic pyramid | A representation of the distribution of biomass, numbers, or energy among trophic levels |  | 19 |
| 7746183042 | Biogeochemical cycle | The movements of matter within and between ecosystems | 20 | |
| 7746183043 | Hydrologic cycle | The movement of water through the biosphere | 21 | |
| 7746183044 | Transpiration | The release of water from leaves during photosynthesis | 22 | |
| 7746183045 | Evapotranspiration | The combined amount of evaporation and transpiration | 23 | |
| 7746183046 | Runoff | Water that moves across the land surface and into streams and rivers | 24 | |
| 7746183047 | Carbon Cycle | The movement of carbon around the biosphere | 25 | |
| 7746183048 | Macronutrients | Key elements that organisms need in relatively large amounts: nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur | 26 | |
| 7746183049 | Limiting nutrient | A nutrient required for the growth of an organism but available in a lower quantity than other nutrients | 27 | |
| 7746183050 | Nitrogen cycle | The movement of nitrogen around the biosphere | 28 | |
| 7746183051 | Nitrogen fixation | A process by which some organisms can convert nitrogen gas molecules directly into ammonia | 29 | |
| 7746183052 | Nitrification | The conversion of ammonia into nitrite and then into nitrate | 30 | |
| 7746183053 | Assimilation | The process by which producers incorporate elements into their tissues | 31 | |
| 7746183054 | Mineralization | The process by which fungal and bacterial decomposers break down the organic matter found in dead bodies and waste products and convert it into inorganic compounds | 32 | |
| 7746183055 | Ammonification | The process by which fungal and bacterial decomposers break down the organic nitrogen found in dead bodies and waste products and convert it into inorganic ammonium | 33 | |
| 7746183056 | Denitrification | The conversion of nitrate in a series of steps into the gases nitrous oxide and, eventually, nitrogen gas, which is emitted into the atmosphere | 34 | |
| 7746183057 | Leaching | The transportation of dissolved molecules through the soil via groundwater | 35 | |
| 7746183058 | Phosphorus cycle | The movement of phosphorus (which rarely changes form) around the biosphere | 36 | |
| 7746183059 | Hypoxic | Low in oxygen | 37 | |
| 7746183060 | Sulfur cycle | The movement of sulfur around the biosphere | 38 | |
| 7746183061 | Disturbance | An event, caused by physical , chemical, or biological agents, resulting in changes in population size or community composition | 39 | |
| 7746183062 | Watershed | All land in a given landscape that drains into a particular stream, river, lake, or wetland | 40 | |
| 7746183063 | Resistance | A measure of how much a disturbance can affect flows of energy and matter in an ecosystem | 41 | |
| 7746183064 | Resilience | The rate at which an ecosystem returns to its original state after a disturbance | 42 | |
| 7746183065 | Restoration ecology | The study and implementation of restoring damaged ecosystems | 43 | |
| 7746183066 | Intermediate disturbance hypothesis | The hypothesis that ecosystems experiencing intermediate levels of disturbance are more diverse than those with high or low disturbance levels | 44 |
