| A | B |
|---|
| cell respiration | the process of using oxygen to release energy from food |
| condensation | the process by which water vapor is changed to liquid water |
| evaporation | the process by which liquid water changes to water vapor |
| food chain | the path of energy from one living organism to another in an ecosystem |
| food web | the overlapping food chains that link producers, consumers, and decomposers in an ecosystem |
| nitrogen cycle | the cycle through which nitrogen gas is changed into compounds that can be used by living things & then is returned to the atmosphere |
| oxygen-carbon dioxide cycle | a natural cycle in which plants and other producers use carbon dioxide and produce oxygen, & living things use oxygen & produce carbon dioxide |
| precipitation | the process by which water from clouds falls back to Earth |
| protein | organic compounds that form the structure & control the processes that take place in licing things; the building blocks of living things |
| transpiration | a process in which a plant releases moisture through its stomata |
| water cycle | a continuous process in which water moves between the atmosphere & Earth's surface, including its use by living things |
| first-order consumers | organisms that eat producers |
| second-order consumers | organisms that eat first-order consumers |
| third-order consumers | organisms that eat second-order consumers |
| herbivores | only eat plants |
| carnivores | only eat animals |
| omnivores | eat both plants & animals |
| eating animal foods (meat, eggs, fish) | eating high on the food chain |
| eating plant foods (grains, fruits, vegetables) | eating low on the food chain |
| algae-prawn-sticklefish-heron | producer-1st order consumer-2nd order consumer-3rd order consumer |
| grass-cricket-mouse | producer-1st order consumer-2nd order consumer |
| sewage treatment plant | a place that cleans up waste water |
| nitrogen gas | can't be used directly by most organisms until it is "fixed", or changed into a compound |
| algae growing in a salt marsh | producer |
| duck that eats grass | first-order consumer |
| owl that eats a duck that ate grass | second-order consumer |
| owl that eats a rail that ate a cricket that ate grass | third-order consumer |
| bacteria | grows on plant roots & makes nitrogen usable by turning it into ammonia |
