BTB changing color is evidence for pic one A: matter movement
B: Matter change
C: Energy change
also it is because pick one
A:it detects the diff type of energy
B: it detects matter moving around from one place to another
C: it detects diff amounts of chemicals in the air

Bromothymol blue (BMB) is an indicator dye that turns yellow in the presence of acid. When

carbon dioxide is added to the solution, it creates carbonic acid, lowering the pH of the

solution. BMB is blue when the pH is greater than 7.6, green when the pH is between 6-7.6, and

yellow when the pH is less than 6

not only is it colder, it also becomes darker, less salty, and more dense.