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.
You may not know you have a tapeworm infection until you see segments of the worm in your stools (poo). A tapeworm infection does not always cause symptoms, or the symptoms are often mistaken for another illness. A tapeworm infection typically causes stomach pain and sometimes vomiting and diarrhoea.ysticercosis. The larvae (cysticerci) of the pork tapeworm can cause cysticercosis. This is when cysts (tiny sacs) enclosing the larvae settle outside your intestines in other tissues and organs, such as your lungs, liver, eye or brain. The cysts grow very slowly and cause inflammation (swelling).