Problem - the question to be answered, Hypothesis - educated, testable guess, Materials - the items that will be used in an experiment, Procedure - a sequential list of steps that are followed in an experiment, Data - the information collected during an experiment, Observation - using your five senses to gather data about the world, Qualitative - a descriptive observation; what is it like?, Quantitative - an observation that involves how much or how many, how big or how small, Inference - an assumption (guess) based on on what you observe, Opinion - a gut reaction to something; not always based on fact, Prediction - a guess about what will happen in the future, Conclusion - a final discussion of what was learned in an experiment, Variable - The thing that is changed in an experiment, Trial - One run-through of the experiment. Many should be done., Outlier - A piece of data that does not fit in with the rest., Sources of Error - Things that happen that could change your results. This is why we don't always get the same results., independent variable - The variable that is changed by the scientist in the experiment; there can be only one, dependent variable - The data collected; the thing that changes because of what the scientist changed, Control - Something that is not changed in an experiment, Goggles - Should be worn when using heat, glass or chemicals,

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