graphing biology honors
TRANSCRIPT
Graphing DataShowing patterns & trends
2010-2011
Types of data (information)
Variables dependent variable
measured variable unpredictable change: we don’t know how it will
change until we do the investigation Y-axis
independent variable manipulated variable predictable change: it only
changes because we chose how it would change
X-axis Constant Variables
Remain the same throughout the experiment
Bio-H 2010-11
The effect of _____________
on _____________
Independent Variable
Dependent Variable
Examples of experiment - A How does light color affect the growth rate of
plants? we set up an experiment testing different colors of
light on different plants & measuring the growth (height) of the plants: dependent variable (Y-axis)?
height of plants independent variable (X-axis)?
Color of light (wavelength)
Bio-H 2010-11
The effect of _____________
on _____________
Color of Light
Height of Plants
Examples of experiments -B
How does caffeine affect heart rate of science teachers? we set up an experiment testing different
amounts of caffeine (mg) on the heart rate of teachers: dependent variable (Y-axis)?
heart rate (bpm) independent variable (X-axis)?
Amount of caffeine (mg)
Biology H – 2010-11
The effect of _____________
on _____________
Caffeine
Heart Rate
Examples of experiments C
What’s the favorite candy bar of students? we set up an experiment surveying students and
asking which is their favorite candy bar : dependent variable (Y-axis)?
number of students independent variable (X-axis)?
type of candy
Biology H – 2010-11
The effect of _____________
on _____________
Candy Bar type
Number of students
Making pictures out of data
Graphs line graph
Use when data shows a trend or continuous change bar graph (or histograms)
Use when graphing data that is in disconnected groups
Biology H – 2010-11
Biology-H 2010-11
How does elevation affect temperature?
elevation
Te
mp
era
ture
(•C
)
5
10
15
20
25
30
0 500 1000 1500 2000 25000
elevation (feet above sea level)
temp.
(°C)
0 30
500 25
1000 20
1500 15
2000 10
2500 5
1200 ft?
18
Line graph!
1200
Biology H 2010-11
Which Candy Bar do you like best?
type of candy (feet above sea level)
nu
mb
er
of
stu
den
ts
1
2
3
4
5
6
Almond JoyMilky Way Kit Kat Snickers M&Ms0
Brand number
Almond Joy 1
Milky Way 1
Kit Kat 4
Snickers 4
M&M’s 3
Reese’s Cup??
RCRC
Bar graph!