Aim: How do scientist organize
their experimental information?
They collect Data
Data Collection
Gender
M
F
M
F
M
F
M
F
Accept
Praise
Remediate/Probe
Criticize
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.
How can we organize this
information?
• A data table makes organizing data easier to read
and study
Data Tables
Independent
Dependent
The independent variable
ALWAYS is written in the LEFT
column and the DEPENDENT
variable in the RIGHT.
Procedure:
1) Half the students will measure their heart rate for 1 minute
during rest and write it on a piece of paper.
2) Half the students will be instructed to complete 30
Jumping Jacks.
3) Those students who completed the Jumping Jacks will
measure their heart rate for one minute and write it on a
piece of paper.
Our Results:
Group A
Students
at rest
1
HR
Group B
Students
after 30 JJ
1
2
2
3
3
AVG=
AVG=
HR
Let’s Graph!!!
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.
Types of Graphs:
Line Graph
What is this graph telling us?
Types of Graphs:
Pie Graph
What is this graph telling us?
Types of Graphs:
Bar Graph or Histogram
What is this graph telling us?
Let’s Graph the Results from our
Experiment:
Y axis
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.
X Axis
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.
Our Graph:
(Beats per minute)
Dependent Variable
Y
The Effects of Exercise
on Heart Rate
Legend
Control
Group
Experimental
Group
X
Independent Variable
(Number of Jumping Jacks)
What are our results?
Our results indicate that heart rate increased after the
students performed 30 jumping jacks.
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.