1. Control: The part of the experiment that scientists keep the same during the experiment ex: temperature, location, light. Control Group: The group in the experiment that remains unchanged.

2. Independent Variable: The variable the experimenter changes. Also known as the manipulated variable. Dependent Variable: The variable that changes due to the change in the manipulated variable. Also known as the responding variable.

3. Quantitative Observation: Observations based on quantity ex: how much, how many, numbers Qualitative Observation: Observations based on quality ex: use your five senses