The result will usually be that the vinegar cleans the pennies better, demonstrating that a lower-pH solution is better at cleaning discoloration due to oxidation. The volume of liquid and the material of the penny are both controlled variables in this experiment. This experiment is especially good for teaching the concept of a controlled variable if you include a third variable -- how dirty the pennies are.
1 doctor agreed: Yes: Pinworm symptoms can include gastrointestinal upset, anal or vaginal itchiness, loss of appetite, difficulty sleeping, irritability, restlessness. Untreated pinworm infection can lead to weight loss, diarrhea, genital rash, urinary incontinence and vaginal discharge.
Upper abdominal pain, loss of appetite and diarrhea may occur with intestinal worms. Tapeworm may develop if a person ingests an infected flea from their pet. Tapeworm can also result from eating undercooked fish, pork or beef contaminated with the parasite.scariasis -- a type of roundworm infection -- can cause symptoms similar to pneumonia, such as coughing, wheezing and fever. This occurs when larvae migrate to the lungs before intestinal infection takes place, making its diagnosis difficult.