ES 6-7 Flashcards
(16 cards)
Viruses are not “alive” because they do not have…
cells
When inorganic carbon in the environment is utilized for conversion into organic matter;
Autrophy
The five compounds which can act as oxidizing agents in remineralization of organic matter include: oxygen, nitrate, iron oxide, sulfate and
water
Organisms that are”heterotrophic” cannot…
synthesize their own food
In photosynthesis, plants use inorganic CO2, water and ___________________ to make more complex organic molecules.
sunlight
The gaseous by-product of photosynthesis.
Oxygen
A functional unit of the ecosphere in which living and nonliving components interact dynamically.
ecosystem
____ serve the important function of recycling nutrients in an ecosystem to maintain balance.
decomposers
Autotrophs which produce organic matter from inorganic carbon and are the base of the food chain
Producers
The two major ecosystems;
Terrestrial
Aquatic
Why are fossil fuels considered non-renewable resources?
Rates of human extraction far outpaces the rates of natural formation.
_____ ______ occurs when diatomic nitrogen is taken from the atmosphere during bacterial metobolism in soils and water and converted to nitrogen in the form of ammonia and nitrate, which may be utilized by plants.
Nitrogen fixation
How can volcanic eruption like that of Mt. Pinatubo affect global climate?
climatic cooling
2 limiting nutrients in aquatic systems;
nitrogen
phosphorus
The activities of ___________ have significanly impacted the chemical, biological and biogeochemical cycles of planet Earth.
people
The largest sedimentary reservoirs of carbon is stored as…
limestone
