Terms : Hide Images
| 12955990875 | law of conservation of energy | Energy cannot be created or destroyed but can be converted into different type of energy | 0 | |
| 12955994623 | food chain losses occur | at each transfer | 1 | |
| 12955997087 | law of conservation of matter | during ordinary chemical changes there is no detectable increase or decrease in quantity of matter | 2 | |
| 12956001077 | emergent properties | New properties that arise with each step upward in the hierarchy of life, owing to the arrangement and interactions of parts as complexity increases. | 3 | |
| 12956003961 | open system | A system in which matter can enter from or escape to the surroundings. | 4 | |
| 12956005352 | closed system | A system in which no matter is allowed to enter or leave | 5 | |
| 12956008656 | isolated system | A system that can exchange neither energy nor matter with its surroundings. | 6 | |
| 12956008657 | water cycle | The continuous process by which water moves from Earth's surface to the atmosphere and back |  | 7 |
| 12956016674 | how have humans effected the water cycle | increased the melting of ice storages, building of artificial reservoirs, damming rivers, | 8 | |
| 12956018778 | the carbon cycle | The organic circulation of carbon from the atmosphere into organisms and back again |  | 9 |
| 12956026807 | human activities affecting carbon cycle | combustion, land use changes, deforestation | 10 | |
| 12956027836 | nitrogen cycle | The transfer of nitrogen from the atmosphere to the soil, to living organisms, and back to the atmosphere |  | 11 |
| 12956029821 | nitrogen fixation | the conversion of atmospheric nitrogen into compounds, such as ammonia, by natural agencies or various industrial processes. | 12 | |
| 12956032137 | nitrification | conversion of NO2 (nitrite) to NO3 (nitrate) | 13 | |
| 12956035326 | Assimilation | when nitrogen is absorbed into the body of plants | 14 | |
| 12956036766 | Ammonification | decomposers convert organic waste into ammonia | 15 | |
| 12956038030 | denitrification | Conversion of nitrates into nitrogen gas | 16 | |
| 12956041466 | eutrophication | A process by which nutrients, particularly phosphorus and nitrogen, become highly concentrated in a body of water, leading to increased growth of organisms such as algae or cyanobacteria. |  | 17 |
| 12956043468 | the phosphorous cycle | the cyclic movement of phosphorus in different chemical forms from the environment to organisms and then back to the environment |  | 18 |
| 12956046826 | Sulphur Cycle | A major biogeochemical cycle consisting of the routes that sulphur atoms take through the nested networks of environmental systems. | 19 |
