Four students performed four different investigations by combining different substances. Their results are shown in the table below. In which experiment did a chemical reaction take place, and how do you know?
Experiment 1 Experiment 2 Experiment 3 Experiment 4 powder added two liquids crystals added solid added
to liquid combined to liquid to liquid
result: bubbles result: level of result: crystals result: solid
produced liquid goes up dissolve completely sinks to bottom
of container