Types of Variables in Science Experiments
In any scientific experiment, identifying and understanding the different types of variables is crucial for accurate and meaningful results. Here are the key variables:
Independent Variable
- The one factor you change in the experiment.
- Example: Presence or absence of caffeine.
Dependent Variable
- The factor you measure in response to the change.
- Example: Number of words recalled.
Controlled Variables
- Factors you hold constant to ensure a fair experiment.
- Examples: Caffeine source, caffeine amount.
Confounding Variables
- Hidden variables that might affect the results.
- Examples: Time of day, caffeine sensitivity.
Carefully controlling these variables helps ensure that the results of an experiment are valid and reliable.