Matter and Energy — Internal Energy and Temperature

About this lesson

This lesson introduces the concepts of systems, temperature, internal energy, and specific heat. It explains the types of systems (open, closed, isolated) and uses examples like boiling water in an open container, a soft drink can in ice, and a thermos flask. The lesson defines temperature as a measure of the average kinetic energy of particles and internal energy as the sum of kinetic and potential energies of all particles. It also explores factors affecting the change in temperature when heat is gained or lost: mass of the substance, type of substance, and state of the substance. Practical activities compare heating different masses of water, equal masses of water and oil, and equal masses of water and ice. The concept of specific heat is introduced with a table of values for various substances, and a life application mentions water's use as a coolant in car radiators. By the end, students should be able to classify systems, understand temperature and internal energy, identify factors affecting temperature change, and interpret specific heat values.