When you are ready to activate the animation click the start button in the animation rectangle.

When the animation begins notice what is happening to the particles. You should also notice what is happening to the temperature of the system as indicated by the thermometer. When the temperature stops changing click the mouse on the Continue button and the animation will continue. When the animation finally stops answer the questions. It is OK to view the animation more than once, just click on the Repeat button.

Important do not press the enter key or the Return key while you are answering these questions. Your Browser will interpret either key the same as clicking the mouse on the Submit button. So BE CAREFUL!

Give me some responses to the questions below and I'll give you some extra credit.

SID#:

Laboratory Section:

1. Briefly describe what you observed happening when you ran P-L Exploration #1. Use any or all of the following terms in your explanation: gas, liquid, solid, particles, attraction(s), temperature, kinetic energy, translational energy, speed, chemical change, physical change, condensation, freezing, melting, vaporization, collision.

2. List any phase changes you observed in the animation. Indicate if you think each phase change is exothermic or endothermic.

3. List any phase changes you did not observe in the animation.

4. Is there anything about this animation that you feel you do not understand? List your concerns/questions.