Hewitt Drew-It! PHYSICS Screencasts
Temperature, Heat, and Expansion

Hewitt-Drew-it! PHYSICS 71.Heat and Temperature
Heat and Temperature are defined and distinguished.

Hewitt-Drew-it! PHYSICS 72. Specific Heat
The "thermal inertia" of substances is explained, particularly water.

Hewitt-Drew-it! PHYSICS 73. Thermal Expansion of solids
Expansion of solids, bimetallic strip, and ring around the Earth.

Hewitt-Drew-it! PHYSICS 74. Thermal Expansion of Water.
Densest water at 4C explained, with classroom video of ice formation.