Penny Lab

Gabbeh Parente D September 21, 2010 Penny lab Problem: Does the consequence of drops of liquid a penny can hold be on the pillowcase of liquid being used? Materials: * Beaker of irrigate. * snapper eye dropper * Penny * Petri dish * Paper towels * dense brown milk Pre-lab: Independent variable: water certified variable: deep brown Milk guess: If the guinea pig of liquid changes (from water to coffee bean milk) then the bring outlet of drops to get out with the penny will decrease. Procedure: * Determine the number of drops of water it takes to take up a penny, holding the eye dropper 2 cm. from the penny. * Dry the penny and re rise x4 * Determine the number of drops of coffee tree milk it takes to execute a penny, holding the eye dropped 2 cm. from the penny. * Dry the penny and retest x4. * Calculate info. Data: Diagram: closing curtain: The conclusion I came to was my hypothesis was correct.

The number of water drops it took to close the face og a penny was greater than the number of chocolate milk drops. For the water tests the average amount of water it took to fill the penny is 23 drops, but for the milk tests the average was 21.75. The info in the chart above shows that the number of drops went down by 1.25 when the liquid was changed from water to milk. Further testing may be needed. Sources of error: The main source of error in this test was the human error. Our group found it was difficult to keep our commute at the height of 2 cm, which i s a variable that we couldnt control nor kee! p track of. Also without knowing soul could bump the table, move the Petri dish or in some way caused the liquid on the penny to spill out front it overflowed.If you want to get a full essay, array it on our website: OrderCustomPaper.com

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