Collecting and Graphing Data

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Collecting and Graphing Data

• Biology
• Fall 2009

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The Metric System

• We always collect data using the metric system
• Its pretty simple everything is based on the
  number 10

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• 1000 100 10 1 0.1 0.01 0.001

k i l o (k)
h e c t o (h)
d e k a (da)
U N I T (gram) (meter) (Liter)
c e n t I (c)
m i l l i (m)
d e c I (d)
To convert from one unit to another count over
how many places to move the decimal
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1000 100 10 1 0.1 0.01 0.001
k i l o (k)
h e c t o (h)
d e k a (da)
U N I T (gram) (meter) (Liter)
c e n t I (c)
m i l l I (m)
d e c I (d)
For example lets convert 54 cm to km
.00054km
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Convert the following

• 1.0 cm into m
• 5000 mg into g
• 700 km into m
• 25 L into mL
• 6.5 mL to L
• 106.5 cm to m
• 0.8L to mL

• 0.01 m
• 5 g
• 700000 m
• 25,000 L
• .0065 L
• 1.065 m
• 800 mL

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Parts of a Graph
Title
y axis
dependent variable
x axis
independent variable
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Independent v. Dependent

• Independent
• x axis
• variable you control
• hours studied per night
• time
• of dog bones fed to your dog

• Dependent
• y axis
• variable you measure
• grade you receive
• distance traveled
• girth of your dog

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A way to remember

• DRY MIX
• Dependent, Responding on Y axis.
• Manipulated, Independent on X axis.

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Line Graphs
FAT DOGS

• Best type of graph to show a relationship between
  two variables.
• Example kg of food fed vs. girth of dog in cm.

Never forget the title
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Bar Graphs
Friday Night Fun

• Great for showing categories
• Example Favorite activities of cool science
  students on Friday night!

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Pie Graph
Favorite Pizza Toppings

• Wonderful for showing percentages
• Example Favorite Pizza Toppings