1st test review
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| spontaneous generation | Hypothesis (disproven) stating that life could arise from nonliving matter
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| controlled experiment | a test of the effect of a single variable by changing it while keeping all the other variables the same
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| manipulated variable | factor in an experiment that a scientist purposely changes - also known as an independant variable
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| responding variable | factor in an experiment that scientist wants to observe that may change in response to the manipulated variable
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| theory | well tested explanation that unites a broad range of observations
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| biology | science that seeks to understand the living world
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| sexual reproduction | process by which two cells from different parents unite to produce the first cell of a new organism
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| asexual reproduction | process by which a single parent reproduces by itself
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| metabolism | set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life purposes
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| stimulus | a signal to which an orgtanism responds - any kind of detectable signal that carries info
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| homeostasis | process by which organisms maintain a relativfely stable internal environment
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| evolution | changes in a kind or organism over time; process by which modern organisms have descended from ancient org.
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| electron microscope | microscope that forms an image by focusing beams of electrons onto a speciman
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| compound light microscope | microscope that allows light to pass through a speciman and uses two lenses to form an image
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| cell culture | group of cells grown in a nutrient solution from a single original cell
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| cell fractionation | technique in which cells are broken into pieces and the different cell parts are separated
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| The work of scientists usually begins with | careful observation
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| Information gathered from observing changes during an experiment becomes | data
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| You suggest the athe presence of water could accelerate the growth of bread mold. This is a | hypothesis
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| Which of the folowing is not a part of how scientists work? | guessing
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| The most important rule in the laboratory is | following rules
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| Which of the following is NOT considered a safety procedure | If in doubt about any part of an activity , trust your instinct
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| The component opf an experiment that you change is called the | variable
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| Data that is numerical or can be measured is considered _____________ data | quantitative
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| The ______________microscope used in most high school laboratories | compound light
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| The process used by scientists to test a problem is thye | scientific method
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| Biology | Study of life
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| Zoology | Study of animals
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| Botany | Study of plants
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| Physics | Study of physical world (motion energy)
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| Chemistry | Study of chemicals
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| Oceanography | Study of oceans
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| Gemology | Study of gems
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| Geology | Study of rocks
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| Volcanology | Study of volcanoes
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| Astronomy | Study of univers and beyond
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| List 7 steps of scientific method | Observation, state the problem, research, create a hypothesis, design and conduct experiment, collect data, conclusion
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| Scientific method defined as | process used by scientists to test a problem
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| parts of the microscope that magnify the specimen are the | objectives
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| What are the 4 objectives on the microscopes in this lab | 4x, 10x, 40x, 100x
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| Which 2 parts do you carry it by | arm and base
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| To focus an object you must turn the ______adjustment knob | coarse
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| To clarify or sharpen an image you must turn the ________knob | fine
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| You turn the ____________ to change the objective that you are using | nose piece
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| What does the diaphragm do ? | focuses the light on a specific area
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| experiment has 2 components... | controls and variables
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| 2 types of variables... | manipulated variable adn reponding variable
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| Early experiments of life...vitalism.. | life generated by objects acquisition of "Ethers" ...led to idea of spont. gen.(flies from dead animals , mice came fr. hay)
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| Redi -experiment who? | idea challenged by Francisco Redi in 1698
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| Redi- experiment what? | 3 jars of meat,1 open, 1 covered airtight, 1 covered byh screen (ethers no flies), flies source of maggots Biogenesis
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| Biogenesis | All life comes fr. pre-existing life
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| Anton Van Leeuwenhock | first to observe cork cells and moving specimens in rain, ponds amnd dust...animalcules
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| John Needham | wanted to disprove Redi used unsealed gravy- heated it (heat would kill all) life grew - said life came from gravy
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| Lazzars Spallanzani | said hat Needham did not heat the gravy enough boiled 2 jars sealed one not other sealed one grew nothing! organisms came fr. air...supported Redi
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| Louis Pasteur | was to settle the argument flask with curved neck open to air boiled.. no org. after a year broke neck off - quick organisms
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| "All living things come from other living things" | Louis Pasteur conclusion
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| Properties of Life (8) | Must be at least one cell Must be able to reproduce Must have hereditory material 5)Must be avble to obtain /use energy 6)Must be able to respond to environment 7)Most responses geared to maintaining *) org. must evolve
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| hereditory info | DNA RNA
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| examples of homeostasis | temperature, water content, pH of cell
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| examples of evolution | plants surviving during times with little or no water
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| 10 levels of biological organization | biosphere ecosystem community population organism organ system organ tissue cells molecules
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| biosphere | all ecosystems
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| ecosystem | community and non living surroundings
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| community | groups of populations that live together
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| population | number of specific type of organisms
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| organism | individual living things
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| organ system | group of organs with similar function
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| organ | group of cells with similar function
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| tissue | group of cells with similar function
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| cell | basic unit life of life
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| molecules | groups of atoms
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Created by:
keel
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