Presentation on theme: "Manipulated Variable (Independent variable)"— Presentation transcript:
1 Manipulated Variable (Independent variable) the variable that is deliberately changed by the scientist.“What is the scientist changing in this experiment?”
2 Responding Variable (Dependent variable) the variable that changes as a result of the change in the manipulated variable.“What is the scientist looking for or trying to measure?”Or“What is responding to the changes?”
3 controlled variables all the variables that are kept the same so that any change in the responding variable can be attributed to the change in the manipulated variable“What does the scientist have to do in order for this to be a fair test?”
9 Responding/Dependent Variables Amount of sugar that dissolves completely measured in grams
10 Controlled Stirring Type of sugar "More stirring might also increase the amount of sugar that dissolves and different sugars might dissolve in different amounts, so to insure a fair test I want to keep these variables the same for each cup of water."
11 Example #2Does fertilizer make a plant grow bigger?
12 Manipulative/Independent variable Amount of fertilizer measured in grams
13 Responding/Dependent Variables Growth of the plant measured by its heightGrowth of the plant measured by the number of leaves
14 Controlled Same type of fertilizer Same size pot for each plant Same type of plant in each potSame type and amount of soil in each potSame amount of water and lightMake measurements of growth for each plant at the same time