1. KEY CONCEPT Science is a way of thinking, questioning, and gathering evidence.

2. Like all science, biology is a process of inquiry.
Scientists make careful and systematic observations.
Scientists record observations as data.
Scientists form a hypothesis as a possible answer to  a question.
Scientists test their hypotheses and analyze their data.

3. Biologists use experiments to test hypotheses.
Observational studies allow scientists to describe a phenomenon.

4. Experimental studies allow scientists to determine what causes a phenomenon.

5. Experiments have two groups
1. Control group- The experimenter does not change any of the conditions
2. Experimental group - The experimenter varies only one of the conditions

6. Experimental studies allow scientists to determine what causes a phenomenon.
Independent variables are controlled by the scientist
Dependent variables are observed and measured.
Constants are conditions that are kept the same.

7. A theory explains a wide range of observations.
Theories explain a wide range of observations and experimental results.
A theory is supported by a wide range of scientific evidence.
Theories can change based on new evidence.

8. Your friends complain that when they eat chocolate, they break out
Your friends complain that when they eat chocolate, they break out. Design an experiment to test this idea. Be certain to include and identify:
The experimental group
The control group
The independent variable
The dependent variable