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Form Question:
How does (a change in the independent variable) affect (how the dependent variable changes)? Question Example: How does the speed of water evaporation from a salt solution affect the size of salt crystals that form? |
independent variable: what YOU are changing, test only ONE controlled variable: things that stay the same in the experiment, keep the experiment fair dependent variable: what you are trying to measure |
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Examples:
Bad Question: How is one brand of battery different from another? Good Question: Which lasts longer: a brand-name battery or a store-brand battery? Bad Question: Which brand of popcorn is best? Good Questions: Which brand of microwave popcorn leaves the fewest unpopped kernels? |
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