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| a conclusion based on observation or evidence |
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| broad explanation of natural events that is supported by evidence |
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| compare results between 2 or more groups |
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group being tested (receive treatment) |
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comparison group (receive placebo) |
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fake treatment used to fool participants into thinking they are being studied |
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| Independent Variable (IV) |
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variable being tested what the experimenter changes plotted on X-axis |
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variable being measured DEPENDENT on manipulation (experimenter can't directly affect this) plotted on Y-axis |
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| Why should we use experiments rather than rely on common sense? |
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we want unbiased evidence THINK: Do we want to take a drug b/c the company thinks it will work, or do we want experiments to know it will work? Drug company is "biased" towards wanting you to use it (make money!) |
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| What happens when homeostasis is NOT achieved? |
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| disease (think cancer) or death |
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| Autotrophs vs. Heterotrophs |
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Autotrophs - make own food Heterotrophs - must find food |
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carried out by plants, algae, some bacteria |
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