Scientific Investigation

Scientific Investigation is part of Scientific Investigation in the ACT Science section. The questions below are written in the style of the real test, each with the answer and a worked explanation.

Question types you will see here include independent, dependent, and controlled variables, purpose of a control group or trial, why a procedure step was done and factors held constant.

Common traps: naming the measured quantity as the manipulated one; naming a controlled variable as the independent variable; naming a conclusion instead of a variable.