11. Set up the dancing raisins For 1 minute observe your setup Now for 1 minute REALLY make observations Share them with your group Observations & The Dancing Raisins
12. When a scientist wants to learn about something, they usually start with several questions Your job is to write down at least 3 different questions about the Dancing Raisins experiment you observed in class that might be interesting to test. Problem Statement & the D.R. [QUESTION]
13. What makes a good problem statement? It cannot be answered yes or no Does not contain the word “best” or a form of the word “best”. The answer to the Problem Statement has measurable results which can be graphed. If the answer to the question is known without experimentation, because it is quite obvious, then a new Problem Statement (question) is needed. Problem Statement & the D.R. [QUESTION]
14. Some examples of good PS Does the height of an incline affect the speed of an object? Does the diameter of a disc affect its speed down an incline? Does the height of a bean plant determine how many beans the plant will produce? How does the number of breaths affect the distance traveled by a rocket balloon? Problem Statement & the D.R. [QUESTION]
15. A scientific explanation for a set of observations that can be tested. A.K.A – a testable explanation for observations Hypothesis
16. Choose one of your problem statements. Write a hypothesis that tests your question. Use “If, then, Because…” format. If then because First blank = Independent Variable (IV) Second blank = Dependent Variable (DV) Hypothesis and the D.R.
17. Problem Statement: How many bubbles does it take to float a raisin? Now you create a proper hypothesis. Samples: If we add bubbles one at a time, then the raisin will float when the count reaches 20 because the bubbles will balance the density and buoyancy of the raisin. If there is less than 20 bubbles on the raisin, then the it will not float because the bubbles increase the buoyancy of the raisin. Formative Assessment
18. By yourself, I want you to write step-by-step directions of how to make a peanut butter sandwich. Be sure to be as detailed as you can! Write them so that another student or adult could pick up your directions and create the sandwich just like you would want. Writing directions
19. Egg Float Activity Observe the egg setup. What might be a possible problem statement? What might be a potential hypothesis? If we add 6 teaspoons of salt to the water, then the egg will float because the water will be more dense than the egg. Making graphs & Charts [COLLECT & ANALYZING DATA]
20. What data do we want to collect? [what are we measuring?] How are we going to organize it? Now that we have it, what will we do with it? Making graphs & Charts [COLLECT & ANALYZING DATA]
21. 6 sentence minimum conclusion structure #1 Rewrite your hypothesis [Use IF, THEN, BECAUSE format] #2 State whether the data did you got supported your hypothesis OR disproved your hypothesis. #3 Explain your data and what happened in your experiment. #4 What do you now conclude about the way things work? [The data I got shows …{explain concept}…..] #5 What are you now wondering? [What questions do you have now that you are done] #6. If you conducted this experiment again, what would you change? [looking at your design and results where were the sources of potential errors, what could have been done better, what could be expanded upon, etc.] Writing a Conclusion
22. Problem Statement (Question) Hypothesis Experiment Collect and Analyze Data Write a Conclusion Repeat & Publish Results The whole story
