Tuesday 11/16/10 Particles Reading Assign. Foam Cube Activity DateAssignmentPage 11/16Particles 11/16

What we will do today… 1.We will learn more about the idea of matter being made of particles. 2.We will revisit compression and expansion of gases within a syringe and foam cube system. 3.We will review how particles can help explain what happened to the foam cubes in our syringe system.

How we will do it… Group discussion Reading the Particles article and answering questions in your journal. Syringe and foam cube activity Recording observations and making drawings Whole class discussion

Particles Assignment 1.Do not write on the article. 2.Read article. 3.Answer questions in journal on page labeled “Particles.” 4.You may work in table partners or groups.

Foam Cube Inquiry Blue = closed-cell cubes Gray = open-cell cubes. 1.Drop both cubes inside the syringe barrel. 2.Push the plunger half way down. 3.Close the system with a clip on the tubing. 4.Make observations about what happens to the cubes as you compress and expand the air around them. 5.Draw what you think is happening to the particles in each cube as you compress and expand the air.

Foam Cube Discussion 1.What happened to the two foam cubes when the air around them was compressed? 2.How do you explain the blue closed-cell cube getting smaller when the air around it is compressed? 3.Are there more air particles, fewer air particles, or the same number of air particles inside the closed cells when the cube is compressed?

Blue Closed-Cell Discussion 1.How do you explain the gray open cell cube staying the same size when the air around it is compressed? 2.Are there more air particles, fewer air particles, or the same number of air particles inside the open cells when the cube is compressed?

Gray Open-Cell Discussion 1.Where did the extra particles inside the gray open-cell foam cube come from? 2.Why weren’t there more particles inside the blue closed-cell foam cube?