interaction - to have contact with something through touch or action, test - to find out something, system - parts that work together, experimental investigation - investigation where you change 1 variable, measure 1 variable, and control other variables, variable - something that can change, independent variable - the 1 variable you change on purpose (cause), dependent variable - the 1 variable you measure and collect data on (effect), controlled variables - the other variables in an investigation that you keep the same, repeated trials - doing 3 or more tests of something to get more reliable data, design - to plan ,

C6L2: Effects of Force (5.7B)

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