Scientific Investigation

The Scientific Method The scientific method is a set of steps scientists can use to find answers to questions. Five major steps of the scientific method: Observation Hypothesis Experiment Data Analysis Conclusion

Observation Observations are descriptions of objects or events using the five senses Example: The mixture is powdery and white.

Hypothesis A hypothesis is an explanation of an observation that can be tested. Example: The mixture is probably baking soda and citric acid.

Experiment An experiment is a test to check if a hypothesis is correct. Example: -Water is added to a mixture of baking soda and citric acid -An equal amount of water is added to an equal amount of mystery mixture

Data Analysis Data is a record of notes collected during an experiment. Data is often organized in charts or graphs so results can be compared. Analysis means looking closely at results of data. Example: The mixture reacted to water in the same way as baking soda and citric acid.

Conclusion A conclusion is an explanation of the results of an investigation. Example: It is possible the mixture is baking soda and citric acid.

Variables of Investigation Variables are anything that can change the result of an experiment. It is important to keep variables controlled so that the experiment is a fair test. Example: Measure equal amounts of water, mixture, baking soda, and citric acid.