1. 1. Clear off table except for lab safety notes/rules/notebook 2. Lab safety quiz 3. Begin experimental design HAPPY FRIDAY!!!!

2. Don’t say anything Examine the picture In a moment, I will ask you to share your observations INSTRUCTIONS

4. DESIGN

5. Step 1: Make observations Step 2: Ask a question Step 3: Make a hypothesis Step 4: Set up an experiment Step 5: Analyze the data Step 6: Repeat experiment Step 7: Draw conclusion THE PROCESS

6. constants all factors which are NOT allowed to change during the experiment

7. A variable is something that changes. There are 2 types of variables: Independent variable Dependent variable

8. independent variable independent variable the variable that is changed on purpose by the experimenter aka cause, stimulus, reason, manipulated variable, etc. This is the ‘’if” part of a hypothesis. is on the X-axis of a graph

9. X-Axis

10. dependent variable dependent variable the variable that responds aka effect(s), result(s), responding variable, etc. This is the ‘’then” part of a hypothesis. is on the Y-axis of a graph

11. X-Axis Y-Axis Title: Independent Var. vs. Dependent Var.

12. repeated trials the number of times the experiment is repeated The more times you repeat the experiment, the more VALID your results are.

13. Hypotheses are tentative and testable statements Hypotheses are supported or not supported by observational evidence theories are based on natural and physical phenomena and are capable of being tested by multiple independent researchers THEORIES VS. HYPOTHESES