Question

A student has a petri dish with a layer of marbles rolling around in it. Which of the following activities should the student perform to demonstrate phase transition from a liquid to gas?

A) Stacking a layer of marbles on top of the existing layer and slowly jiggling them to represent removal of energy
B) Stacking a layer of marbles on top of the existing layer and slowly jiggling them to represent addition of energy
C) Removing all but two marbles from the petri dish and shaking them vigorously to represent removal of energy
D) Removing all but two marbles from the petri dish and shaking them vigorously to represent addition of energy

Answer 1

To demonstrate the phase transition from a liquid to a gas, the student should perform option D, which involves shaking a reduced number of marbles vigorously in the petri dish to represent the addition of energy.

Step-by-step explanation:

To demonstrate a phase transition from a liquid to a gas using a petri dish with marbles, the student should choose the activity that represents the addition of energy, as this is required for vaporization—the process where a liquid changes into a gas. Of the available options, the one that best represents this process is: Option D - Removing all but two marbles from the petri dish and shaking them vigorously to represent addition of energy. This simulates the increased movement of particles that occurs when a liquid gains energy and transitions into a gas. Shaking the marbles vigorously will simulate the molecules moving faster and eventually becoming a gas due to increased kinetic energy.