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information gathered using one of the 5 senses.


an assumption based on prior knowledge


a factor that can be changed in a system


step of the scientific method where the problem is stated.

qualitative observation

an observation that describes the object. Does NOT use measurements or calculations

quantitative observation

observations that use measurements or calculations

scientific method

step-by-step method of problem solving


an educated guess

manipulated variable

variable that is changed on purpose.

responding variable

variable being tested, what you are measuring.

controlled variable

variable that is NOT changed


part of the scientific method where you test your results

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