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BACTERIA LAB

This study investigates whether bacteria can grow from human contact and breath, following the scientific method. Two Petri dishes were exposed to touch and breath, while a control dish was left undisturbed. Over a week, bacteria colonies developed, with the touch dish showing the earliest growth and the largest number of colonies. The breath samples also produced significant growth, while the control remained clear. The experiment disproved the initial hypothesis, demonstrating that bacteria can thrive on surfaces and in agar from human interaction.

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BACTERIA LAB

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  1. BACTERIA LAB JACKSON CRUITT A PERIOD

  2. SCIENTIFIC METHOD • Purpose: Can we grow bacteria? • Hypothesis: I don’t think that bacteria will grow. • Procedure (experiment): We touched and breathed on two Petri dishes to see if any bacteria would grow but we left one alone as well. We waited a week, then when bacteria started to grow we looked at the petri dishes under the microscope.

  3. Class A’s Touch petri dish grew bacteria earlier the other petri dishesand had the most colonies. • The touch was the most affective in triggering the growth of bacteria.

  4. Class A’s breath Petri dish had the largest colonies . • Class A’s breath Petri dish was the second dish to grow bacteria.

  5. The control dish was empty and stayed that way through out the project.

  6. RESULTS

  7. CHART

  8. COLONY SIZE

  9. CONCLUSION • My hypothesis was wrong because bacteria did grow. I learned that bacteria can grow from our breath and touch and that they can grow in agar.

  10. WORK CITED • http://www.google.com/imgres?q=scientific+method&num=10&hl=en&safe=strict&tbo=d&biw=1024&bih=506&tbm=isch&tbnid=kLcF4xQWfFX8FM:&imgrefurl=http://mail.colonial.net/~hkaiter/scientific_method.html&docid=BStwNCVd49OykM&imgurl=http://mail.colonial.net/~hkaiter/A_IMAGES/sci_meth.gif&w=389&h=500&ei=niaYUKWTKYTC9gTI2ICgCQ&zoom=1&iact=hc&vpx=110&vpy=2&dur=629&hovh=255&hovw=198&tx=71&ty=110&sig=111472496972845237760&page=3&tbnh=154&tbnw=120&start=31&ndsp=18&ved=1t:429,r:12,s:20,i:173 slide 9 picture

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