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LS LSAF Chapter 1
Exploring and Classifying Life
| Term | Definition |
|---|---|
| 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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