Where can we find bacteria
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Where can we find bacteria? PowerPoint PPT Presentation


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Where can we find bacteria?. Lab Today. Bacteria and fungi have been growing for 6 days We will look at what grew Make observations Reassess hypothesis Make conclusions Make health recommendations. Safety. Keep the Petri dish closed Don’t open it or touch the samples. Observations.

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Where can we find bacteria?

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Where can we find bacteria

Where can we find bacteria?


Lab today

Lab Today

  • Bacteria and fungi have been growing for 6 days

  • We will look at what grew

  • Make observations

  • Reassess hypothesis

  • Make conclusions

  • Make health recommendations


Safety

Safety

  • Keep the Petri dish closed

  • Don’t open it or touch the samples


Observations

Observations

  • What does it look like?

    • Color

    • Shape – circular, irregular?

    • Texture – shiny, fuzzy?

  • Make a drawing of what you see (use color) and describe it in words

  • Use microscope to get a closer look


Is it bacteria or mold fungus

Is it bacteria or mold (fungus)?

  • Bacteria is typically white, cream ,or yellow and fairly circular in shape

  • Mold can be whitish gray with fuzzy edges or different colors – usually turns a different color in the center (like bulls-eye)


Is it bacteria or mold fungus1

Is it bacteria or mold (fungus)?

Bacteria – Bacillus subtilis


Is it bacteria or mold fungus2

Is it bacteria or mold (fungus)?

Green mold - Trichoderma harzianum


Is it bacteria or mold fungus3

Is it bacteria or mold (fungus)?

Bacteria – Staphylococcus aures


What about yeast

What about yeast?

  • Yeast looks similar to bacteria but is a fungus

  • Candida albicans grows as white patches with glossy surface


Make a creative title page

Make a creative Title page

  • Give your booklet a title

  • Make a drawing


Credits

Credits

  • Title slide pictures from: http://www.norcalblogs.com/ and http://biology.clc.uc.edu/Fankhauser/Labs/Microbiology/Coliform_assays/Plates_with_Colonies/Ohio_River_0.2mL_MaC_P8011311.jpg

  • Other pictures and information from:http://www.sciencebuddies.org/science-fair-projects/project_ideas/MicroBio_Interpreting_Plates.shtml

  • Picture of Bacteria booklets (Slide 10) by Katherine Pease – booklets made by students in Brian Gabrich’s 7th grade classes at Emerson Middle School


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