Bottled Water vs Tap Water Essay Examples

water 33 39 36 42 37.5 On soap-washed penny 15 20 17 22 18.5 Calculations The calculations conducted in the laboratory were supposed to get the average of the four trials Average: (Trial 1 + Trial 2 +Trial 3 + Trial 4)/ 4 Untouched penny average: (33+39+36+42)/4= 37.5 Soaped penny: (15+20+17+22)/4= 18.5 Discussion From the results above, it is clear that the penny that was not soaped required many water droplets before they spilled, as compared to the washed-up penny that requires fewer water droplets before spilling. This phenomenon is attributed to the surface tension and cohesion water properties. Cohesion can be defined as the intermolecular force that manifests between similar water...

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water, flooded with iodine for 1 minute and decolorized with ethanol. Samples are then flooded with Safranin and observed with an oil immersion lens. Halobacterium requires a hypersaline environment. Cultures are incubated at 20 °C and 45°C with an optimal growth being achieved at 42°C. Independent and dependant Variables. Bacteria are divided into Gram-positive and Gram-negative bacteria stained in blue and pink respectively. Definite identification is achieved by the differential media. Morphological observations help in identifying unknowns. Standard Control: Airflow should be reduced while transferring content by closing windows and doors. Storage is done for 24 hours under appropriate...