Qualitative  quality or state of being  examples: color, shape, relative size (large/small), relative speed (fast, slow) Quantitative  quantity, specific amount (measure)  examples: 35.0 mL, 10 m/s, 4 cm wide & 2 cm long

 In this activity, you will need to carefully observe the substance(s) in the flask in order to arrive at an explanation for the change that occurs. Make your observations both before and after shaking.  Use both qualitative (color, shape, relative size, etc.) and quantitative (# mL, time to change color, number of shakes, etc.) observations.  Make at least 10 observations and mark each with a “L” (qualitative) or “N” (quantitative).  More observations are better than a few…you won’t know which ones are important until later.

 CAUTION: LIQUID IS CAUSTIC AND MAY CAUSE BURNS  KEEP STOPPER FIRMLY ON THE FLASK (CHECK IT OFTEN)  WIPE UP ANY SPILLS IMMEDIATELY  WASH HANDS IMMEDIATELY IF ANY LIQUID MAKES CONTACT WITH YOUR SKIN.  WASH HANDS WHEN LAB IS COMPLETE

Why did the liquid change color? Your explanation for why this occurred is the hypothesis. You and your members may have more than one hypothesis, so you must talk to your members and agree on one…write this on your lab sheet. On the back of the lab sheet write: “ How to test the hypothesis :” and give specific directions as to how someone might try to show that the hypothesis is correct (this is the Procedure).

 Conclusions are drawn from the Observations made and Data collected while testing the Hypothesis.  Peer-review is an important part of the Scientific Method. If the Hypothesis cannot be supported by others doing the same experiment (following the same Procedure), then the Hypothesis will be rejected.

My definition of science is…  A search for understanding and explaining the natural world

One way to answer questions about observed phenomena

 Question or Problem  Make Observations (Quantitative & Qualitative)  Forming a Hypothesis  Testing the Hypothesis (Materials, Procedure, Data Collection)  Forming Conclusions  Withstanding Peer-Review

On a separate sheet of paper, show how the Blue Bottle Lab demonstrates the steps of the Scientific Method. For each step, use a specific example from the activity. For example, Question or Problem: Why does shaking the flask cause the liquid to turn blue?