1. Aim #5: What do scientists do during experiments?
Date: September 11, 2015
Aim #5: What do scientists do during experiments?
HW:
HW #2-Textbook Guided Reading Worksheet due Wednesday 9/16
Quiz - Scientific Method Thursday 9/17
Do Now: Warm-Up Notebook
Date Title of Activity Page #
9/11 Experimental Design 12

2. What do scientists do during experiments?
They collect Data

3. Data Collection
Gender
Accept
Praise
Remediate/Probe
Criticize
M F
Data generally refers to the results of trials, or tests,
completed during experiments.
A data table is an important initial stage in making sense
of the information you will collect while doing an experiment.

4. How can we organize this information?
A data table makes organizing data easier to read and study

5. Data Tables
Independent
Dependent
The independent variable ALWAYS is written in the LEFT column and the DEPENDENT variable in the RIGHT.

6. Procedure:
Half the students will measure their heart rate for 1 minute
during rest and write it on a piece of paper.
Half the students will be instructed to complete 30
Jumping Jacks.
Those students who completed the Jumping Jacks will
measure their heart rate for one minute and write it on a
piece of paper.

7. Our Results: Group A Group B Students at rest HR 1 2 3
Students after 30 JJ HR 1 2 3
AVG=
AVG=

8. Let’s Graph!!!

9. Why do scientists utilize graphs?
A carefully constructed graph can provide us with a large
amount of information quickly.
It also allows us to carefully analyze our results from an
experiment.

10. Types of Graphs:
Line Graph
What is this graph telling us?

11. Types of Graphs:
Pie Graph
What is this graph telling us?

12. Types of Graphs:
Bar Graph or Histogram
What is this graph telling us?

13. Let’s Graph the Results from our Experiment:
We will be making a bar
graph from our results.
We will graph the average
heart rate for the control
group and the
experimental group.
Y axis
X Axis

14. Rules for Constructing Graphs:
Rule 1: The dependent variable is plotted on the vertical,
Y-Axis.
Rule 2: The Independent Variable is plotted on the horizontal,
X-Axis.
Rule 3: The spacing between the numbers on both axes
must be in equal increments.

15. Our Graph: Y The Effects of Exercise Legend on Heart Rate Control
Group
Experimental
Group
Dependent Variable
(Beats per minute) X
Independent Variable
(Number of Jumping Jacks)

16. What are our results?
Our results indicate that heart rate increased after the
students performed 30 jumping jacks.

17. What is our conclusion? Was the hypothesis supported or rejected?
This experiment supported our hypothesis. Physical
exercise (Jumping Jacks) increases a person’s heart rate.

18. Aim #5 (cont’d): What do scientists do during experiments?
Date: September 16, 2015
Aim #5 (cont’d): What do scientists do during experiments?
HW:
Practice Questions (answer key will be posted on webpage this afternoon)
Quiz - Scientific Method Thursday 9/17 (periods 1 & 7), Friday 9/18 (period 5)
Do Now: Warm-Up Notebook
Date Title of Activity Page #
9/16 Interpreting the Data 13

19. Technique for Constructing a Line Graph
1. Identify the variables to be plotted
Independent variable
the variable manipulated by the experimenter
is plotted on the x-axis (horizontal axis)
Dependent variable
the factor responding to changes in the independent variable
plotted on the y-axis (vertical axis)
2. Determine the scale of the axes
Determine each axis individually
May easily be determined by taking the largest value to be plotted and dividing by the number of blocks and then rounding up to the nearest convenient number
The graph should be spread to occupy the most available space.
3. Number and label each axis indicating the appropriate units.
4. Plot each data value on the graph with a point.
5. Draw a line that best fits the data points.
Do not connect data points to the origin unless there is data to support this
Only connect the points if the directions tell you to do so.
6. Provide a title which clearly indicates what the graph is about.
If the graph has more than one set of data, provide a key to indicate what is represented by the different lines.