In beaker A, water is heated, bubbles of gas form throughout the water, and the water level in the beaker slowly decreases. In beaker B, electrical energy is added to water, bubbles of gas appear on the ends of
the wires in the water, and the water level in the beaker slowly decreases.
a. What signs of a change are visible in each situation?
b. What type of change is happening in each beaker? Explain your answer.