1. Variables
What is changing?

2. Variables Things that change in an experiment or affect the outcome
Scientist can control or nature can control

3. Independent Variable
What the scientist changes in the experiment or has control over
Example:
Measure temperature of water over time, time is the INDEPENDENT variable

4. Dependent Variable What you measure Nature controls Example
Measure the temperature of water over time, temperature is DEPENDENT VARIABLE

5. Control What stays the same in an experiment Example
You use the same amount of water each time you do the experiment
In an experiment to test which type of fertilizer works best, grow a plant with no fertilizer as a control to compare

6. Types of Graphs Bar graph-categories of information
Line graph-change over time

7. Setting Up Your Graph X-axis- horizontal, independent variable
Y-axis- vertical, dependent variable

8. Scale
Numbers on your graph
Evenly spaced
Numerical order

9. Labels
X-axis
Y-axis
Units
Title
Key-sometimes