1. DESIGNING AN EXPERIMENT (Experiment Design) variables constant experimental control dependent independent

2. Variables Independent Dependent Constant Experiment Test Group Control Group

4. Control Group - used to make comparison with experi-mental groups - Allows us to see how the indep. variable changed our results -set up this group exactly the same experimental group EXCEPT don’t give/don’t do the independent variable - “Fair Test”

5. Experimental/ Test Group Setup containing independent variable

6. Variable -used as a Noun in science Root word: vary (verb) = to change Ex) the weather can vary (verb) Ex) the type of weather will be a variable in our experiment (noun)

7. Independent Variable = the variable that is we get to decide/choose what we want to change -should only have 1 independent variable to make it a “fair test” -then use this to START/set up the experiment

9. Dependent Variable the result/outcome of the experiment What we measure/observe AFTER completing the experiment

10. Constant Variables Factors that are kept the same throughout the experiment. =Fair test

11. What is the effect of sunlight on the growth of plants?

12. The Effect of Sunlight on the Growth of Plants Control Group Experimental Group Constant Variables Independent Variable Dependent Variable

13. Problem: Where will bacteria grow best? How does the location affect the growth of bacteria? Control Group Constant Variables Independent Variable Dependent Variable

15. Problem: Where will bacteria grow best? How does the location affect the growth of bacteria? Control Group Constant Variables Independent Variable Dependent Variable

18. Control Group Constant Variables Independent Variable Dependent Variable Control Group Constant Variables Independent Variable Dependent Variable