Interactions & Interdependence
Energy Flow
Feeding Relationships
Cycles of Matter
Miscellaneous
100
the combined portions of Earth in which all living things exist
What is the biosphere?
100
the original source of almost all the energy in most ecosystems
What is sunlight?
100
name for organisms that feed only on plants
What are herbivores?
100
term for the repeated movement of water between Earth's surface and the atmosphere
What is the water cycle?
100
percentage of enegy stored in an organism that can be passed on to the next trophic level
What is 10%?
200
all the members of a particular species that live in the same area
What is a population?
200
Name for organisms that use energy to produce their own food supply from inorganic compounds
What are autotrophs?
200
animals that eat both producers and consumers
What are omnivores?
200
term for a chemical substance that organisms require to live
What is a nutrient?
200
Of photosynthesis, transpiration, and respiration: the one that does NOT include the cycling of carbon through the biosphere
What is transpiration?
300
Ecological method being used when an ecologist enters an area periodically to count the population numbers of a certain species
What is observing?
300
Term for an organism that cannot make its own food
What is a heterotroph?
300
Name for organisms that feed on plant & animal remains and other dead matter
What are detritivores?
300
term scientists classify the nitrogen, water & carbon cycles as
What is biogeochemical cycles?
300
type of pyramid showing the amount of living tissue at each trophic level in an ecosystem
What is a biomass pyramid?
400
branch of biology dealing with the interactions among organisms and between organisms and their environment
What is ecology?
400
process by which some organisms use chemical energy instead of light energy to produce carbohydrates
What is chemosynthesis?
400
all the interconnected feeding relationships in an ecosystem
What is a food web?
400
molecules that living organisms need nitrogen to make
What are amino acids (or proteins)?
400
organisms that carryout the process of nitrogen fixation
What is bacteria?
500
the simplest grouping of more than one kind of organism in the biosphere
What is a community?
500
two terms for organisms that rely on other organisms for their energy & food supply
What are consumers & heterotrophs?
500
name for each step in a food chain or a food web
What is a trophic level?
500
the rate at which organic matter is created by producers in an ecosystem
What is primary productivity?
500
a nutrient that is scarce or cycles slowly through an ecosystem
What is a limiting nutrient?
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