Student Name: _____________________________ Date: ____________________
Activity Sheet 1
BACTERIA TAKE OVER
Problem:
How does bacteria grow? Can bacteria be visible? What areas have the most and least bacteria?
Background:
Germs are EVERYWHERE!!! This is something that you most likely have heard. Quite often
illnesses and diseases can be caused by the transmittance of some sort of microorganism. These
different microorganisms
could vary from some sort of virus
, fungi
, or bacteria
. Bacteria in particular
are single celled microbes. The cell structure is simpler than that of other organisms as there is no
nucleus
or membrane
bound organelles. Instead their control centre containing the genetic information
is contained in a single loop of DNA
.These little invaders use the nutrient rich and warm human body to
prosper and to replicate themselves (Alberts, Johnson, & Lewis). An example of a harmful bacteria is E
Coli. When E Coli is found in food or water it can be harmful to our bodies.
Hypothesis:
#1 How does Bacteria Grow?
I believe that…
________________________________________________________________________
Because,
________________________________________________________________________
#2 Can bacteria be visible?
I believe that…
________________________________________________________________________
Because,
________________________________________________________________________
#3 What areas have the most and least bacteria?
I believe that…
________________________________________________________________________
Because,
________________________________________________________________________
Materials:
- petri dishes (1-2 per group)
- Nutrient agar powder (or agar powder and
beef boulion cube)
- heater or incubator
- cotton swabs
- hand sanitizer
- marker for labeling
- liquid bleach
- lab safety gloves
- miscellaneous metals
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