Penny Lab

Gabbeh Parente D September 21, 2010 Penny lab Problem: Does the number of drops of liquid a penny can hold think on the pillowcase of liquid being used? Materials: * Beaker of piss. * nub eye dropper * Penny * Petri dish * Paper towels * enigmatical brown milk Pre-lab: Independent variable: water leechlike variable: deep brown Milk guess: If the emblem of liquid changes (from water to coffee berry milk) then the step forwardlet of drops to dish 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 running x4 * Determine the number of drops of coffee berry milk it takes to get hold of a penny, holding the eye dropped 2 cm. from the penny. * Dry the penny and retest x4. * Calculate info. Data: Diagram: finale: The co nclusion I came to was my hypothesis was correct.

The number of water drops it took to carry out 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 information 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 give at the height of 2 cm, w hich is a variable that we couldnt control n! or keep track of. Also without knowing intellect could bump the table, move the Petri dish or in hardly a(prenominal) way caused the liquid on the penny to spill out front it overflowed.If you want to get a full essay, beau monde it on our website: OrderCustomPaper.com

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