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23 Cards in this Set

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  • Back
scientific method
technique used to solve problems and gain scientific information
steps of the scientific method
definig the problemm, making a hypothesis, testing out your hypothesis, observing what you found, concluding the results of the experiment
scientific law
scientific facts based on experiments which are tested over and ovver- law of gravity
theories
possible and true explanations of complex problems- darwin and theory of evolution
ecology
study of the interactions of plants and animals and their interrelationships with the physical environment
population
all the members of a certain species living in a specific spot and at the same time
community
all the interacting populations in the same location at a given time- dependent upon eachother
ecosystem
all the living and non living things functioning together in the same area at same time
biosphere
the portion of earth in which life exists, numerous ecosystems
abiotic
non living
biotic
living
2 conditiions that have to be met to be a self sustaining ecosystem
constant source of energy and recycling of materials
examples of limiting factors
temperature, intesnity of light, ph, amount of oxygen
autotrophs
organisms that create their own food- plants
heterotrophs
organisms that cannot make their own food
saprophytes
decomposers- feed on dead organic matter
herbivores
animals that consume plant matter
carnivores
an8imals that consume other animals
omnivores
consume plant and animal matter
herbivores
animals that consume plant matter
steps of food chain
producers-primary consumers-secondary consumers-decomposers
pyramid of energy
more energy at producer level- energy is lost as it is passed up
biomass pyramid
bottom has most mass- top has least