Problem/Question (cm 3 ). How much sugar in mass (g) will affect the size of the bread loaf in volume (cm 3 ).
Steps of the Scientific Method Observation/Research 2. Observation/Research: Make observations and research your topic of interest.
Observation/Research John researches the areas of baking and fermentation and tries to come up with a way to test his question. He keeps all of his information on this topic in a journal.
How will John set up his investigation? What 3 important questions he will need to research?
Steps of the Scientific Method Formulate a Hypothesis 3. Formulate a Hypothesis: Predict a possible answer to the problem or question. Example: If soil temperatures rise, then plant growth will increase.
Dependent Variable In this case, it would be the size of the loaf of bread. (Length in cm x width in cm x height in cm)
3c. Control Variables The control variables in an experiment are all the factors that the experimenter attempts to keep the same.
3c. Control Variables John’s teacher reminds him to keep all other factors the same so that any observed changes in the bread can be attributed to the variation in the amount of sugar.
Can you think of some control variables for this experiment?
Control Variables They might include: Other ingredients to the bread recipe, oven used, rise time, brand of ingredients, cooking time, type of pan used, air temperature and humidity where the bread was rising, oven temperature, age of the yeast…
Steps of the Scientific Method Experiment 4. Experiment: Develop and follow a procedure. Include a detailed materials list. The outcome must be measurable (quantifiable).
Experiment His teacher helps him come up with a procedure and list of needed materials. She discusses with John how to determine the control group.
4d. Control Group Because his grandmother always used 50g. of sugar in her recipe, John is going to use that amount in his control group.
Experiment John writes out his procedure for his experiment along with a materials list in his journal. He has both of these checked by his teacher where she checks for any safety concerns.
Trials Trials refer to replicate groups that are exposed to the same conditions in an experiment. John is going to test each sugar variable 3 times.
Steps of the Scientific Method Collect and Analyze Results 5a. Collect and Analyze Results: Modify the procedure if needed. Confirm the results by retesting. Include tables, graphs, and photographs.
Collect and Analyze Results John comes up with a table he can use to record his data. John gets all his materials together and carries out his experiment.
What will you need to create to analyze data for this experiment?
Size of Baked Bread (LxWxH) cm 3 Amt. of Sugar (g.) 123Average Size (cm 3 ) 25768744761758 501296118812961260 10011881080 1116 250672576588612 500432504360432 Size of Bread Loaf (cm 3 ) Trials Control group
Graph 5a. What patterns do you observe? 5b. What is wrong with the experiment? 5c. How can we correct it? Control group
Collect and Analyze Results John examines his data and notices that his control worked the best in this experiment, but not significantly better than 100g. of sugar.
Analyze Data John rejects his hypothesis, but decides to re-test using sugar amounts between 50g. and 100g.
Experiment Once again, John gathers his materials and carries out his experiment. Here are the results.
Size of Baked Bread (LxWxH) cm 3 Amt. of Sugar (g.) 123Average Size (cm 3 ) 501296144012961344 601404129614401380 701638 15601612 8014041296 1332 90108012009721084 Size of Bread Loaf (cm 3 ) Trials Control group
Graph What patterns do you observe? Does this new experiment correct the previous errors? What is the best amount of sugar to use? Control group
Collect and Analyze Results John examines his data and notices that 70 g of sugar worked the best in this experiment. Also, it is better than his control which proves his experiment works.
Steps of the Scientific Method Conclusion 6a. Conclusion: Include a statement that accepts or rejects the hypothesis. Make recommendations for further study and possible improvements to the procedure.
Conclusion John finds that 70g. of sugar produces the largest loaf in the data analysis. 6a. Explain why this is true using research.
Conclusion 6b. Describe some errors that happened and how John improved it.
Conclusion 6c. What could John do in another experiment to get an even bigger loaf of bread?
Communicate the Results John tells his grandmother about his findings and prepares to present his project in Science class.
Steps of the Scientific Method Communicate the Results 7. Communicate the Results: Be prepared to present the project to an audience. Expect questions from the audience.
7. Communicate the Results John creates a display board about his findings and prepares to present his project in Science class to the other students.