Science as a Process Mr. Rolfe/Ms. Gogolin Behavior of Natural Systems The goal of Science is to explain natural phenomena. Scientists: Start with the assumption that nature is understandable and predictable. However, natural systems are complex so… Scientists follow the same basic method of studying and describing natural events. 1. Ask a Question Scientific inquiry begins with observation. Science inquiry involves asking questions and processing information from a variety of reliable sources. Observation vs. Inference Observation- direct way of gathering information in an organized way. 2 types of observations Qualitative and Quantitative 2. Form a Hypothesis Hypothesis - a testable explanation of a situation. Format: If , then . Example: If the plant is watered every day, then it will grow. Hypothesis that are supported through experiments and data are then accepted in the scientific community. 3. Test the Hypothesis An Experiment - a procedure carried out by certain guidelines. Experiment Variables Independent Variable – Only one factor in an experiment that you change. Ex: Amount of Sunlight Dependent Variable – What is being tested or measured Results from or depends on changes to the independent variable Ex: A Plant Growing Control Group- group you keep the same (all variables are constant) Analyzing the Data A graph of the data makes easier to interpret. 4. Report Conclusions Conclusions are reached after Controlled experiments Unbiased investigations Large amounts of data Conclusions are published so others can review the results and discuss the merit of the experiment. Finally….. A Scientific Theory is made. Theory- explanation of a natural phenomenon supported by many observations and experiments over time A theory is NOT the final answer because Scientists debate each other ideas New information can always change a theory Identify the following terms: identify the problem, hypothesis, experiment, independent variable, dependent variable, and create a conclusion The leaves on my tomato plants were turning yellow. I was not sure what to do. I decided that maybe they were not getting enough sun. I moved one plant into the sun and left the other one where it was. I recorded the different shades of the leaves (yellow, yellow-green, and green).