Scientific Inquiry and Process Skills
What this domain tests
Scientific inquiry is the set of habits a scientist uses to turn a question into trustworthy evidence. You must know the parts of an investigation: a testable question, a hypothesis (a prediction you can test), variables, a procedure, data, and a conclusion. Know the variable types: the independent variable is what the investigator changes on purpose, the dependent variable is what is measured as a result, and controlled variables are everything kept the same so the comparison is fair.
Skills to master
Understand observation versus inference: an observation is something you directly sense or measure, while an inference is an explanation you build from observations. Know the difference between qualitative data (descriptions such as color or texture) and quantitative data (numbers with units). Recognize the value of repeated trials and of a control group, which receives no treatment and shows what would happen otherwise. Be able to read simple tables and graphs and to spot a conclusion that goes beyond the data.
Traps to watch for
Questions often offer a "best" answer that sounds scientific but ignores one variable. Watch for a hypothesis worded as a question, a measurement given without a unit, or a conclusion that claims cause when only a pattern was shown. Another common trap is confusing the control group with the controlled variables.
Rule of thumb
Change one thing, measure one thing, keep the rest the same, and repeat. If a proposed answer changes two variables at once, it cannot be the fair-test answer. For example, if a student waters one plant daily and another weekly while both sit in the same window, the watering schedule is independent, plant height is dependent, and light and soil are controlled.