Understanding the Scientific Method

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Presentation transcript:

Understanding the Scientific Method Penny Lab Understanding the Scientific Method

Pre-LAB (Make an Observation) Make a Qualitative observation of the lab Make a Quantitative observation of the lab

Water has the ability to “stick to itself” (cohesion) and create a force when together (surface tension). Purpose: To determine if soapy water droplets will stick together better on a penny surface compared to tap water droplets due to cohesion and surface tension properties.

Consider the following: Make a Hypothesis Consider the following: How many water drops will fit on a penny? How many water drops will fit on a penny if the water is mixed with soap?

Experiment How many drops of water will fit on a penny without spilling? How many drops of soapy water will fit on a penny without spilling?

Record Data Make a Data Table Water Type Trial 1 Trial 2 Trial 3 Average Tap Water Soapy Water

Analyze Data Using the data you collected, explain your results (in 2 complete sentences). What did your average data show? (The penny held more of which water type?) Why did you test each water type more than once?

Make a Conclusion (5 sentences) Was your hypothesis correct? Why or Why Not? Was there a control in the experiment? What was the purpose of: Independent variable of the experiment? What did your results show about surface tension (water “sticking to itself”)? Errors??