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LS LSAF Chapter 1

Exploring and Classifying Life

TermDefinition
Scientific Method The set of skills used to solve problems in an orderly way
Hypothesis A proposed answer to a question which can be tested.
Theory An explanation for things that is supported by scientific knowledge based on many observations and/or experiments
Organism Any Living thing
Homeostasis The ability to control proper conditions inside no matter what is happening outside an organism
Growth One of the Life Processes. The ability of an organism to develop
Respiration One of the Life Processes. The ability of an organism to get energy from food
Nutrition One of the Life Processes. The ability of an organism to take in food and useful gases
Excretion One of the Life Processes. The ability of an organism to get rid of wastes
Sensitivity One of the Life Processes. An organism's ability to recognize and respond to changes in the environment
Movement One of the Life Processes. The ability of an organism to transport substances
Reproduction One of the Life Processes. The ability of an organism to make more of its own kind, to continue its species
Life Processes The collection of activities and characteristics all living things share
Spontaneous Generation Theory that states that living things can come from non-living things
Biogenesis Theory that states that living things come from other living things
Cell Theory The idea that the cell is the basic unit of all living creatures, that all living things are made of cells, and that only living cells can produce other living cells
Francesco Redi In 1668, he conducted an experiment whose result showed that maggots do not generate from rotting meat.
John Needham In 1745, he conducted a flawed experiment whose result showed that bacteria could spontaneously develop from sterilized broth
Lazzaro Spallanzani In 1768, he conducted Needham's experiment with more rigid controlled variables. The results showed that bacteria do not spontaneously generate from broth
Louis Pasteur In 1859, he conducted an experiment whose results showed that bacteria do not spontaneously generate from broth. He developed the s-curve flask
Alexander Oparin In 1924, he hypothesized that energy from the sun, lightning, and the earth's core generated molecules which would later become the basis for life
Stanley Miller & Harold Urey In 1953, they conducted an experiment whose results showed that organic molecules could be produced through the energizing of inorganic gases with electricity
Carolus Linnaeus Developed the two-part naming system used to classify organisms
Aristotle Ancient Greek who developed a system of organizing creatures based on differences and likeness in form
Phylogeny The historical development of an organism
Domain A level of classification that contains the greatest number of similar organisms
Kingdom A level of classification just below domain
Species A level of classification containing the smallest number of similar organisms
Binomial Nomenclature The two-part naming system applied to every living creature. Literally, this means "Two-Name Name Calling"
Dichotomous Key A system used to identify living creatures based on one characteristic at a time. Literally, this means "Two-branched Key"
Scientific Variable Any factor, trait, or condition that can exist in differing amounts or types and may affect the results of an experiment.
Scientific Problem A "who", "what", "when", "where", or "why". Always posed as a question.
Created by: MrGross
 

 



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