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.
How do you know if you have pinworms? Pinworm infection is usually accompanied with intense itching at the anal area. Other symptoms include trouble sleeping (as a result of itching), irritability (from lack of sl â¦ eep and constant itching), and in severe cases weight loss and loss of appetite. pinworm can be caused by biting (or chewing) your fingernails when they are dirty. The pinworm (Genus Enterobius) is a parasitic roundworm. The adult pinworm male is 1-4 mm â¦ in length, while the adult female is 8-13 mm.