1. AIM: How can we set up a controlled experiment
Do Now: Which of the following would be a correct hypothesis for an experiment?
1. will plants grow tall with more sunlight?
2. If plants are exposed to more sunlight,
then they will grow taller
Using the hypothesis, identify the independent variable and the dependent variable in this experiment

2. How does our heart rate change after exercise?
Our Problem
How does our heart rate change after exercise?

3. heart rate tends to increase after we exercise.
Our Observations
heart rate tends to increase after we exercise.

4. Our Research
Scientific Journals
Library
Internet Sources

5. Our Hypothesis
If a person does 30 Jumping Jacks, then his/her heart rate will increase.

6. Our Controlled Experiment
We are going to design an experiment that will allow us to measure heart rate after we exercise.
In our Exercise Experiment, which is the independent variable and which is the dependent variable?

7. What are we changing (manipulating)?
Independent Variable
What are we changing (manipulating)?
Jumping Jacks!!!!

8. What are we going to measure? What is our data?
Dependent Variable
What are we going to measure? What is our data?
PULSE RATE!!!

9. In our Exercise Experiment, which is the Control group and which is the experimental group?
Jumping jacks
Control
no jumping jacks

10. Constant Age Type of exercise Time of day Health
What should be the same in all groups?
Age
Type of exercise
Time of day
Health

11. Sample size? VS The number of “things” included in group.
***Remember- the bigger the sample size, the more valid our results will be!!
How many people should we use?
The whole class!!

12. Procedure
All students will measure their heart rate for 1 minute during rest and record the data.
Half the students will be instructed to complete 30 Jumping Jacks. The other half will rest.
All students will measure their heart rate again for one minute and record it.
All students will calculate their change in pulse rate.
We will record the class results

13. Average change in pulse (bpm)
Results
Data
Graph
table
Average change in pulse (bpm)
Resting
Exercise

14. Answer your problem by explaining your data
Conclusion
Answer your problem by explaining your data

15. Identify the Dependent and Independent Variable:
In an experiment studying the effect of sleep on student achievement.
In an experiment studying the effect of caffeine on worker performance.
In an experiment studying plant growth in different colors of light.

16. Data- (***you will not have any data to use!!!)
Problem
Research
Hypothesis
Experiment
Independent varialbe
Dependent variable
Control group
Experimental group
constant
Data- (***you will not have any data to use!!!)
What type of data would you collect?
how would you set up your data table or graph?