How do scientists do science? BELL RINGER! How do scientists do science? Remember that if you don’t know I want to hear your best guess. It is okay to be wrong. :D

The Scientific Method

Sewer Lice! Used in New York City water treatment Eat waste in the water Make water drinkable almost instantly!

Paper Airplane Lab Purpose: To design a paper airplane which flies the farthest in class Hypothesis: If I build a paper airplane, it will fly farther than any airplane built by my classmates Materials: paper, measuring tape

Procedure Brainstorm an airplane design Build a paper airplane according to the design Fly the airplane Compare the distance flown with my classmate’s distances

Data Mrs. Piner (You name) (Furthest Flier) (Person of your choice) Designer Distance (m) Mrs. Piner (You name) (Furthest Flier) (Person of your choice)

Results: My airplane (did/did not) fly the farthest in class Conclusions: (yes/No), my hypothesis (was/was not) supported by the data. I believe my airplane (did/did not) fly the farthest because _____________________________________________________. By doing this experiment, I learned that _______________________. Sources of Error:

Definitions Independent Variable (I.V.) The variable that is changed by the experimenter Also called the Mannipulated Variable The I.V. in the airplane lab was:

Dependent Variable (D.V.) The variable that is being measured Also called the Responding Variable The D.V. in the airplane lab was:

Constant Variables that are kept the same for each experiment The constants in the airplane lab were:

Control The experiment that has not had any variables changed and is used as a standard comparison.

Important! All experiments must be reproducible If your results don’t match your hypothesis, you change your hypothesis and perform a new experiment, you DO NOT change the data to fit the hypothesis.