QSR #9—JUST COPY PROBLEMS #1 AND #2  In the following 2 scenarios, list the independent variable, the dependent variable, and the control variable(s).  1. We are going to test to see which spray cleaner works best.  2. You want to see which running shoe helps you run faster.

Scientific Method Blueprint For Success

1. Define the Problem  State the problem as a clear question.  Ex:Will the use of Exxon gasoline give my car better gas mileage?

2. Form a Hypothesis in the form of an “If -Then” Statement  IF “independent variable”, then “dependent variable”.  Examples: If I use Exxon Gasoline, then my car will get better gas mileage.

3. Develop a Controlled Experiment Come up with materials, and steps needed

Let’s Look at an Example! Gasoline’s Affect on Car Mileage.

What are Some Possible Variables?  Car type  Gasoline type  Driver  Driving Conditions  Amount of gasoline  Tires  Extra weight in car

If we are testing gasoline, what variables must be kept constant?  The cars must be of the same type.  Each car must have the same amount of gasoline.  The cars must be driven over the same course, at the same speed, and under the same weather conditions.  The cars must contain the same type of tires.  The only difference is the type of gasoline.

4.Conduct the Experiment  several times!!!!!! 1.Reduce error/luck 2.Increase accuracy

5.Analysis of Data  Include charts and/or graphs to show your results!!! (very important)

6.Form a Conclusion  Was my hypothesis correct? EXPLAIN

QSR #11  1. What role does a hypothesis play in scientific inquiry?  2. Describe an example of biotechnology (Biology + technology working together):

Observation  All scientific investigations begin with OBSERVATIONS  Includes using our senses and other tools (ex:computers)  This then leads to SCIENTIFIC QUESTIONS

Write down at least 3 or 4 observations from the pictures below:

Data 1. Qualitative – description using WORDS Ex: McDonalds fries are the best! 2. Quantitative – uses NUMBERS Ex: McDonalds sells over 1000 packs of fries per day

Make 2 qualitative and 2 quantitative statements about the picture below :

Scientific Theory: A proposed explanation for observations and experimental results is supported by a wide range of evidence Can eventually become broadly accepted Ex: Continental Drift Theory, Big Bang theory