Which of the following is a reliable way to observe that a chemical change has occurred when two substances come in contact with one another?(1 point)
observe a color change
observe a color change
monitor for the release of a gas
monitor for the release of a gas
test for the release of heat
test for the release of heat
conduct a test to determine the chemical makeup of the molecules
observe a color change
monitor for the release of a gas
test for the release of heat