Collecting and Graphing Data

The Metric System We always collect data using the metric system We always collect data using the metric system It’s pretty simple – everything is based on the number 10 It’s pretty simple – everything is based on the number 10

k i l o (k) h e c t o (h) d e k a (da) U N I T (gram) (meter) (Liter) d e c I (d) c e n t I (c) m i l i (m) To convert from one unit to another count over how many places to move the decimal

For example lets convert 54 cm to km….00054km k i l o (k) h e c t o (h) d e k a (da) U N I T (gram) (meter) (Liter) d e c I (d) c e n t I (c) m i l I (m)

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 cm to m 0.8L to mL 0.01 m 5 g m 25,000 L.0065 L m 800 mL

Parts of a Graph x axis independent variable y axis dependent variable Title

Independent v. Dependent Independent x axis x axis variable you control variable you control hours studied per night hours studied per night time time # of dog bones fed to your dog # of dog bones fed to your dogDependent y axis y axis variable you measure variable you measure grade you receive grade you receive distance traveled distance traveled girth of your dog girth of your dog

A way to remember … DRY MIX D ependent, R esponding on Y axis. M anipulated, I ndependent on X axis.

Line Graphs Best type of graph to show a relationship between two variables. Best type of graph to show a relationship between two variables. Example: kg of food fed vs. girth of dog in cm. Example: kg of food fed vs. girth of dog in cm. Never forget the title FAT DOGS

Bar Graphs Great for showing categories Great for showing categories Example: Favorite activities of cool science students on Friday night! Example: Favorite activities of cool science students on Friday night! Friday Night Fun

Pie Graph Wonderful for showing percentages Wonderful for showing percentages Example: Favorite Pizza Toppings Example: Favorite Pizza Toppings Favorite Pizza Toppings