Learning Goals: Students will be able to describe matter in terms of particle motion. The description should include

• Diagrams to support the description.
• How the particle mass and temperature affect the image.
• How the size and speed of gas particles relate to everyday objects
• What are the differences and similarities between solid, liquid and gas particle motion

1. Open Gas Properties and then use the pump to put a little gas into the box. a. Observe gas particles' behavior. b. Pump in stheome lighter particles and talk about the similarities and differences that you see between heavy and light particles. c. Use the simulation to see how changing the temperature affects the behavior of the gas particles. d. Write a description for a gas based on the observations; include diagrams to help with the description.

2. How fast do you think the air particles in this room are moving compared to a car going 50 mph (about 22m/s)? Put the answer in the form, "a molecule travels ___ as fast as a car."

3. Using the simulation, test the idea from question 2 and give evidence to support or revise the thoughts. For evidence, include how used the simulation to collect data, and any calculations.

4. Determine the size of the heavy particle using the simulation tools and then relate molecule size to something you are familiar with. A common way to relate two things is to say something like: 1000 particles of sand fit in the palm of your hand. Show the: calculations with the units clearly labeled.

5. Open States of Matter; use the simulation to determine how well liquids and solids match your description of gas particles.

Explains the differences and similarities between solid, liquid and gas particle motion; include drawings to help with the explanations.

Reference:

https://phet.colorado.edu/sims/html/gas-properties/latest/gas-properties_en.html

https://phet.colorado.edu/sims/html/states-of-matter/latest/states-of-matter_en.html