Report

Collect and Analyze Data (GRAPHING) What should be on every graph? • THREE TITLES! • overall title at the top of your graph describing what your graph is about • x-axis title (bottom line) describing what information you test. • Y-axis title (vertical line) describing what information you put Title Y-AXIS X- AXIS X-axis (horizontal, bottom line) • Your INDEPENDENT VARIABLES go along your x-axis. • List each independent variable along the bottom • Don’t forget to put a title along the xaxis after you have listed your independent variables Independent variable Y-axis (vertical line) • Your DEPENDENT VARIABLE goes along the vertical y-axis. • You must look at your data to come up with an appropriate scale. • The scale is what you count up by along the y-axis. • Example: count up by 1’s, count up by 2’s, count up by 10’s, etc. • Always start with zero in the bottom corner. Dependent variable What is a Variable???? Variables: are factors we can control, measure, or manipulate in an experiment Types of Variables: Independent Variable: *one we manipulate and can change EX. Colors, Days, Months, Cities Dependent Variable: *the one that we measure or observe Control Variable: *the one that DOES not change EX. Temperature, # of EX. Time we take shark attacks temp, what tool we use, kind of flower pots Dependent Variable Possible Control Variables: *where you get data *when you take data Independent Variable Bar graph & Line graph • You will make a bar graph if you are comparing 2 or more things. • You will make a line graph if you are tracking something changing over a period of time. Practice bar graph Favorite Sport Basketball Football Baseball Softball Other # of students 45 36 18 11 25 50 45 40 35 30 25 20 15 10 5 0 Basketball Football Baseball Softball Other Practice Line graph Year 1995 2000 2005 2010 # of bears 30 25 17 12 # of Bears Spotted in State Parks 35 30 # 25 20 o f 15 10 5 0 1995 2000 Years 2005 2010 Types of Graphs 3 major types of Graphs: 1. Bar Graph 2. Line Graphs 3. Circle Graphs Line Graphs 1. Most common in science* 2. Shows change over time 3. Shows how one variable changes in response to another 4. Shows trends of data Bar Graphs 1. Categorical data 2. Vertical and horizontal bars 3. Show amounts of each category Circle Graphs 1. Categorical data 2. Shows relationship of part to the whole 3. Must have data for all categories 4. Also called a pie chart