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The materials required for this science fair project:
- 1 empty bottle
- black ants (collected from an ant hill)
- 1 pair of gloves
- 1 lemon
- 1 apple
- 1 tomato
- 1 carrot
- 4 plastic cups
- 1 juice extractor


1. For this science fair project, the independent variable is the type of juice used – lemon, apple, tomato and carrot. The dependent variable is the movement of  ants - in and out of the circle. This is determined by observing if the ants cross the line made  from the juice. The constants (control variables) are the type of ants used, the size of the circle, the concentration of the juice and the width of the line.

2. A small ant hill is located. Wearing   latex gloves,   collect as many ants as possible  in  an  empty bottle. Be extremely careful to avoid being bitten. Do not let the ants crawl over unprotected bare skin. Adult assistance is required.

3. Once you have collected the ants, close the cover and put the bottle aside.

4. Using the juice extractor, prepare  lemon, apple, tomato and carrot juice and pour them into  4 cups.

5. Draw  four  circles on the floor or table using the  extracted juices. Ensure that the lines are thick, and wet with juice. Open the bottle containing the ants and release some of the ants into each of the circles.

6. Observe if the ants are able to cross the lines drawn, and  exit the circle. Record the observations in the table below.

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Complexity level:
Project cost ($):
Time required:
1 day to prepare, 1 hour for the science project experiment
Material availability:
Easily found.
Safety concerns:

Handle ants carefully. They bite! Adult supervision or assistance required