In this experiment, you will determine which of four variables affect the breakdown of rock samples. to do that, you will change one variable at a time and then measure the change in mass of the rock sample. in the space below, write a scientific question you will answer by doing this experiment.

You swipe your debit card too many times. what additional charges should you expect?

Why does the united states constitution require that a national census be taken every ten years?

Dr. redbull conducts a study to determine whether her new energy drink children perform better on spelling tests. she randomly assigns children to one of two groups: group 1 receives her energy drink and group 2 receives water. she then gives both groups a spelling test and compares the results. which of the following is true about this study? a. group 1 is the dependent variable and group 2 is the independent variable. b. this is a correlational study. c. group 2 is the experimental group. d. the independent variable is the type of drink the children receive.