Search for Science Fair Projects

1000 Science Fair Projects with Complete Instructions

Attribution: This is a cached copy of a third party project. Many of these sites are from 20 years ago and the majority are no longer running. We show only the first page of the project. We do not save all pages since copyright belongs to the third-party author.
How Organisms Respond To Changes In Their Environment
How Organisms Respond To Changes In Their Environment

Carmella Gordon             Farragut High School
9700 S. Oakley              2345 S. Christiana
Chicago, Il. 60643          Chicago, Il. 60620
312-233-5809                312-542-3000


To observe the reaction of living cells to mechanical and chemical stimuli.

To observe the streaming of protoplasma in living cells.

To identify the relationship between cell response and survival.


       Living culture               Compound Microscope            
       Droppers                     Salt crystals
       Vinegar                      Microscope slides and coverslips
       Decaffeinated coffee         Caffeinated coffee
       Sugar                        Cotton fibers
       Specimen pipettes


1.  Using a specimen pipette, remove a drop from the collected specimen.
2.  Place culture on the microscope slide and cover.  Focus microscope
    to locate organism.

3.  Having observed the normal activity, some artificial stimuli will
    be introduced so that the cell response can be observed.
    Record observed behavior on chart provided.
4.  Prepare a new culture specimen if necessary; repeat strategies 1-2.

5.  Cautiously place a small salt crystal near some of swimming organisms.
    Observe and record their response.

6.  Continue to add each stimuli along side of covered organism.
    Observe and record the behavior of the organism. 

7.  Observe movement.  Are new structures visible on the organism?
    Has movement stopped?
     Bridging the learning experience, is man being affected by environmental 
Return to Biology Index