Quick Answer. HowStuffWorks explains that food poisoning often occurs when a person eats spoiled food. Common symptoms of food poisoning are stomach pain, diarrhea, nausea, vomiting and cramping.
Confusion continues over coolant colors for cars. Of course, there is still the good old green stuff, but there is also orange, yellow (gold and amber), red, pink, blue and, if you mix the wrong things together, brown. Despite the rainbow of colors, all antifreeze starts out colorless.
Within a certain pressure and temperature range, solid carbon dioxide (dry ice) does not melt. Instead it sublimates or passes directly to the gas phase.  If a small amount of a pH indicator known as bromothymol blue is added to tap water, a blue-green colour results. (see picture to the left).