Middle School Chemistry: Moving Molecules in a Solid

Students observe and describe, on the molecular level, how heating and cooling affect the motion of molecules in a solid.

See how temperature changes affect dissolving and the molecular bonds in a water molecule.

Students investigate the concept of a precipitate by combining two clear, colorless solutions that produce a solid.

This simulation allows students to make observations about how particle motion changes as the overall temperature of a liquid changes.

Young scholars will conduct two chemical reactions: endothermic and exothermic. They will see an animation that shows that it takes energy to break bonds and that energy is released when new bonds are formed, and use that animation to...

Six middle school chemistry lessons about the periodic table and bonding complete with handouts and animations.

Some weddings have flowers in a unique, unnatural color to match the theme. Young scientists take part in this process to learn about the function of the xylem as they observe colored water moving through a flower. Then, they experiment...

Calculate the density of cubes made of different materials to determine what type of material it contains. Using this information explain that the size, mass, and arrangement of the atoms or molecules of a substance determines its density.

Based on experimental observations, young scholars describe, on the molecular level, why the liquid in a thermometer goes up when it is heated and down when it is cooled.

An activity through which students learn why gas is able to dissolve in water, and how heat affects the solubility of a gas in a liquid.