text: what chemicals change colour with heat, light, or pressure?.?   if you have a periodic table of elements handy look up the elements in the middle to the left of the staircase. if u don't have 1 handy ,look it up. or look up transition elements or metals.. those are the elements that change color  silver, gold, cadmium, copper, zinc, nickel, cobalt, aluminum, lead, magnesium, potassium, lithium,