Question: Describe the purpose of the three types of Scientific Investigations: Descriptive, Comparative, Experimental

Answer: Descriptive investigations are used to draw a conclusion or inference. Comparative investigations are used to determine relationships. Experimental investigations are used to determine cause and effect.

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Question: What are the steps of an Experimental Investigation?

Answer: 1) ask a question 2) write a hypothesis 3) make observations 4) test your hypothesis 5) analyze data 6) draw conclusions

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Question: What criteria must be met for a good scientific question?

Answer: Must be testable, measurable, and based on fact (not opinion)

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Question: What term is a possible explanation for a set of observations?

Answer: A hypothesis is a possible explanation for a set of observations.

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Question: What is the correct format for a hypothesis?

Answer: An "if-then" statement. If [independent variable], then [dependent variable].

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Question: What are differences between independent and dependent variables?

Answer: Independent variables are variables changed by the scientist. Dependent variables are variables that change because the scientist manipulated/changed another variable.

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Question: What are constants/controlled variables and why are they important?

Answer: Control variables are variables that stay the same in all test groups. They're important because you need to have something to compare the other variables to.

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Question: Why is using a data table useful in an experiment?

Answer: Data tables help you organize information gathered during testing.

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Question: When would you use the following types of graphs: Bar, Line, Circle?

Answer: Bar-comparing data from a common set (types of floor cleaner, etc); Line-show a progression of data (amounts of something changing); Circle- show parts of a whole (survey, etc.)

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Question: What does DRY MIX stand for?

Answer: DRY-- Dependent (variable) Responding Y-axis, Measurable Independent (variable) X-axis

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Question: What is a conclusion for an experiment?

Answer: A conclusion states the results from the investigation, summarizing what you learned, if your results agreed/disagreed with your hypothesis, and any future questions or testing needed.

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