Materials: -Particle theory worksheet -Fine grain sand -Whiteboard or chalkboard -Chalk or whiteboard markers

Procedure: 1. Begin the lesson by reviewing the definition of particles. Explain that particles are very small amounts of something - like grains of sand. 2. Draw a diagram of a particle on the whiteboard or chalkboard. Explain that particles have a very small size, and that when grouped together they form a solid object. 3. Have students fill out the worksheet about particle theory. 4. Place a small pile of sand on your desk. Ask the students to guess what the sand is made of. 5. Explain that the sand is made up of tiny particles. Ask them to point out the individual grains of sand that make up the pile. 6. Have students use magnifying glasses to look more closely at the sand. Explain that each individual grain of sand is made up of particles as well. 7. Draw a diagram of a particle on the whiteboard or chalkboard to illustrate how particles are made of even smaller particles. 8. Explain that particle theory states that all matter is made up of smaller particles and that these particles can move around each other. 9. Have the students draw diagrams or use whiteboard markers to illustrate how particles can move around each other. 10. Discuss what happens when particles move around each other. Explain that when the particles move around each other they form larger objects like sand! 11. To finish the lesson direct students to complete their worksheets and discuss their answers with each other.

Extra Resources: -Particle theory videos for student review -Particle theory activities for further exploration