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| organized way of using evidence to learn about the natural world |
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| use of one or more of the senses to gather information |
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| evidence; information gathered from observation |
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| logical interpretation based on prior knowledge and experience |
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| possible explanation for a set of observation or possible answer to a scientific question |
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| hypothesis stating that life could arise from nonliving matter |
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| a test of the effect of a single variable by changing it while keeping all other variables the same |
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| factor in an experiment that a scientist purposely changes; also known as the independent variable |
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| factor in an experiment that scientist wants to observe, which may change in response to the manipulated variable; also known as a dependent variable. |
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| well-tested explanation that unifies a broad range of observations |
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| science that seeks to understand the living world |
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| collection of living matter enclosed by a barrier that separates the cell from its surroundings; basic unit of all forms of life |
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| process by which cells from two different parents unite to produce the first cell of a new organism |
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| process by which a single parent reproduces by itself |
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| set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes |
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| a signal to which an organism responds |
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| process by which organisms maintain a relatively stable internal environment |
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| change in a kind of organism over time; process by which modern organisms have descended from ancient organisms |
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| decimal system of measurement based on certain physical standards and scaled on multiples of 10 |
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| device that produces magnified images of structures that are too small to see with the unaided eye |
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| Compound light microscope |
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| microscope that allows light to pass through a specimen and uses two lenses to form an image |
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| microscope that forms an image by focusing beams of electrons onto a specimen |
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| group of cells grown in a nutrient solution from a single original cell |
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| technique in which cells are broken into pieces and the different cell parts are separated |
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