1. 1.3 Scientific Thinking and Processes KEY CONCEPT Science is a way of thinking, questioning, and gathering evidence.

2. 1.3 Scientific Thinking and Processes Like all science, biology is a process of inquiry. Scientists make careful and systematic observations. Scientists test their hypotheses and analyze their data. Scientists form a hypothesis as a possible answer to a question. Scientists record observations as data.

3. 1.3 Scientific Thinking and Processes Biologists use experiments to test hypotheses. Observational studies allow scientists to describe a phenomenon.

4. 1.3 Scientific Thinking and Processes Experimental studies allow scientists to determine what causes a phenomenon.

5. 1.3 Scientific Thinking and Processes 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. 1.3 Scientific Thinking and Processes –Independent variables are controlled by the scientist –Constants are conditions that are kept the same. Experimental studies allow scientists to determine what causes a phenomenon. –Dependent variables are observed and measured.

7. 1.3 Scientific Thinking and Processes 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. 1.3 Scientific Thinking and Processes Your friends complain that when they eat chocolate, they break out. Design an experiment to test this idea. Be certain to include and identify: 1.The experimental group 2.The control group 3.The independent variable 4.The dependent variable