Welcome to class! Get a paper from by the door and answer the warm-up question at the top! Warm-Up Question: (Answer on your paper) What are two things you can do to stay safe in the lab?

Staying safe in the lab: some possible answers Carry lab equipment with 2 hands Be careful around open flames Be careful with chemicals Wear safety glasses Wear gloves Wash your hands regularly Don’t leave bookbags in the aisles Don’t play around during experiments

If you have your Lab Safety Contract please take that out to turn in!

Friendly reminder: Leave your cell phones put away UNLESS Mr. Shimko says you can use them for the activities in class. (I promise there will be times you can use them, just not every class, and we need to concentrate on class). I appreciate your help with this 

How do you design an experiment? Your friend is always trying to make money. He says, “I think if we grow some flowers under red light, the flowers will be red and we can sell them for Valentine’s.” How could you design an experiment to test this idea?

The Scientific Method is a way to solve problems, these are the steps: Purpose/ Question Experiment Data Analysis Research Conclusion Hypothesis

Step 1: Question or Problem What is the question the experiment will answer?

Also identify the variables! Independent Variable – changed during course of experiment and is controlled by you. (the cause) Dependent Variable – Measured to identify changes if any, as a result of changes to independent variable. You have no control. (the effect)

Step 2: Observe/Research Background information, what do we already know? Collect some information about your topic to understand it better.

Step 3: Form a Hypothesis An educated guess, what do you think will happen? Written as an if/then statement, ex: If I give the chicken Red Bull, then it will produce more eggs

Step 4: Conduct an Experiment Perform your test/ experiment and collect data to see if your hypothesis is correct

Step 5: Analyze your Results What do the results of your experiment mean? Does it support your hypothesis?

Step 6: Conclusion The answer to the question. The answer supports or disagrees with the hypothesis.

Time to practice: Experiment time!

Not that experiment, one with music

Let’s use the scientific method to see how music impacts us Fill in the blanks or answer the questions as we go!

Question: How will different types of music affect your heart rate? STEP 1 | ASK A QUESTION Question: How will different types of music affect your heart rate?

STEP 2 | DEVELOP A TESTABLE HYPOTHESIS THAT ANSWERS THE QUESTION Research: What is your opinion of rap music? How does rap music make you feel? What is your opinion of rock n roll music? How does rock n roll music make you feel? What is your opinion of classical music? How does classical music make you feel?

STEP 3 | DEVELOP A TESTABLE HYPOTHESIS THAT ANSWERS THE QUESTION Research: I think that rap music will ______________my heart rate I think that rock n roll music will ________my heart rate. I think that classical music will __________my heart rate. Now, choose a type of music and form an hypothesis using “if” and “then”

Every time you feel a thump = 1 STEP 4 | DESIGN AND CONDUCT AN EXPERIMENT Procedures: Find your pulse on your neck Every time you feel a thump = 1

STEP 4 | DESIGN AND CONDUCT AN EXPERIMENT What is our independent variable? What are we controlling/ doing differently in each trial? What is our dependent variable? What is changing/ what are we measuring because of what we change in each trial?

Procedures: Count your resting heart rate for 30 seconds and then record it in the table. Repeat. Listen to Rap music for 1 minute Count your heart rate for 30 seconds and then record it in the table. Repeat Listen to rock n roll music for 1 minute Listen to classical music for 1 minute

Average = (Trial 1 + Trial 2) / 2 STEP 5 | ANALYZE DATA Resting Heart Rate (Trial 2) Average Heart Rate (Trial 1) After Rap Music After Classical Music After Rock n Roll Music Why do you think it is important to do two trials?

Music Classical: http://www.youtube.com/watch?v=Fo0K_n3VLG4 Rap: http://www.youtube.com/watch?v=VjLHrhLVwzs Rock & Roll: http://www.youtube.com/watch?v=M3T_xeoGES8

STEP 6 | REACH A CONCLUSION A conclusion is similar to an inference. We must use our data to decide what happened. Ex: You have an I-pod. One day you turn your I-pod on, but it doesn’t work. You think the I-pod is dead, so you charge it. But your I-pod still will not work! You replace the headphones, and now your I-pod works. You can conclude that the headphones are broken.

STEP 6 | REACH A CONCLUSION How did rock and roll music affect your heart rate? How did rap music affect your heart rate? How did Classical affect your heart rate? Does this conclusion support or reject your hypothesis? How can you tell?

Final Practice Finish the questions at the bottom and then: Please flip your paper over and answer the questions 1-25 by writing the letter that matches that step of the scientific method beside the problem.