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| Organized way of using evidence to learn about the natural world; also, the body of knowledge that scientists have built up after years of using this process |
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| Use of one or more of the senses--sight, hearing, touch, smell, and sometimes taste--to gather information |
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| Evidence; information gathered from observations |
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| Logical interpretation based on prior knowledge and experience |
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| Possible explanation for a set of observations or possible answer to a scientific question |
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| Hypothesis (disproven) 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 independent variable |
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| Factor in an experiment that a 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 itslef |
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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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| The part of Earth that contains all ecosystems |
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| Smallest functional unit of life |
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| Groups of atoms; smalles unit of most chemical compounds |
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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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