Independent and dependent variables: Practice worksheet



Name: Date: Period: Variables Practice: Independent, Dependent and ControlledIdentify the independent and dependent variables in the following experiments. Then list some ideas for controlled variables.Students watched a cartoon and then rated how funny they thought the cartoon was.Independent Variable: Dependent Variable: Controlled Variables:One group of students studied with the TV on. Another group of students studied in silence. Students were then given a quiz to check for understanding.Independent Variable: Dependent Variable: Controlled Variables:Some students believe if they drink a glass of milk before bed, it will make them sleep longer.Independent Variable: Dependent Variable: Controlled VariablesIdentify the experimental group and the control group in the following experiments.A student wants to test if giving dogs a toy to play with makes their tail wag more. He gives dog toys to one group, while another group of dogs does not get any toys. He counts the number of times each dog wags their tail.Experimental Group:Control Group:Mr. Bullis wants to know if he gives teachers candy, it will make them smile more. He gives half the teachers candy and the other half get nothing. He then records the number of times the teachers smiled.Experimental Group:Control Group:A scientist thinks that ducks swim faster when they are in cold water. He tests two groups of ducks, one in cold water and one in room temperature water. He records how fast they swim.Experimental Group: Control Group: Some teachers think that students learn best in rooms with carpet. They teach the same lesson, but one class is in a carpeted room and the other is not. They give a test and compare the results.Experimental Group: Control Group: ................
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