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 WORDSEx: 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