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.