Middle School Chemistry: Heating and Cooling a Liquid

Compare heating and cooling rates of different land forms. A lab activity has groups collect data on the rate of heating and cooling of soil, grass, saltwater, fresh water, and sand. An analysis of the rates shows how the different land...

Students experiment with a pure substance and a phase change. In this heating and cooling curves lesson plan, students study the effects of heating and cooling a pure substance to observe a phase change. They determine both the melting...

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

Students observe, describe, and draw a model on the molecular level, showing how energy is transferred from one substance to another through conduction.

Students observe, on a molecular level, how heating and cooling affect molecular motion.

Observe how heating and cooling affect the density of water. Combine the concepts of temperature, molecular motion, and density to learn that hot water is less dense than room temperature water and that cold water is more dense.

Explore heat, temperature, and the conduction of thermal energy through different materials.

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

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

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.