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How Many Drops of H 2 O Can Fit on a Penny?

How Many Drops of H 2 O Can Fit on a Penny?. Hill Science 6 Team Work. Lab Rules. Full attention is required to participate in science labs Must listen for and follow directions Must use the equipment correctly

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How Many Drops of H 2 O Can Fit on a Penny?

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  1. How Many Drops of H2O Can Fit on a Penny? Hill Science 6 Team Work

  2. Lab Rules • Full attention is required to participate in science labs • Must listen for and follow directions • Must use the equipment correctly • Anyone not following directions or anyone using equipment incorrectly will immediately be removed from the lab and will not be allowed to participate in the next class lab.

  3. Team Jobs • Each lab group will determine who does each job. • Jobs will rotate so that everyone has the opportunity to do a new job during future labs. • You may not repeat a job until everyone has done it. • Please choose your jobs in your lab groups now.

  4. Team Jobs • Materials – get and return the supplies for the lab • Encourage - everyone participating, writing observations, and on task • Recorder – Writes good copy for the team, presents to class when requested • Time Keeper – Everyone following steps of activity in order, completing in given timeframe

  5. Directions • Materials - get tubs from the supply table • DO NOT TOUCH ANYTHING IN THE TUBS UNTIL INSTRUCTED TO DO SO!!!!

  6. Practice • In order for this lab to be successful, you will need to know how to use a pipette (dropper) and release uniform drops of water. • You need a steady hand. This skill takes patience and practice.

  7. Problem • How many drops of water will fit on a penny? 1. Rinse a penny in tap water and dry completely. 2. Place the penny on a paper towel

  8. Information • What do you already know about water? • Did you learn anything from the Paper Clip Caper that will assist you in making a prediction?

  9. Hypothesis • Using the background information you have make a prediction: how many water droplets will fit on a penny before any falls off? • My prediction: _____________________

  10. Experiment • Each student will get a turn dropping the water – one drop at a time – onto the penny. The other students COUNT and tally the drops. • Use a dropper to place one drop of water at a time on the penny. • Use tally marks to count the number of drops until ANY water runs over the edge. • Once completed another student drops for the next Trial.

  11. DATA

  12. Conclusion 1. Was your prediction correct? Why or why not? 2. Explain the results of the experiment in terms of cohesion and surface tension. 3. How do your results compare to the other groups in your class? Provide at least 2 possible reasons for any similarities and differences you identified.

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