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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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Presentation Transcript
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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