How come an anchor is easier to lift if it's in the water than in open air? It lies in the density of an object versus a certain quantity of water.
The Inclined Plane
The Lever
Mechanical Advantage and Friction
The Screw and the Wheel
The Pulley
Molecules in Solids
Molecules in Liquids
Evaporation and Condensation
Expansion and Contraction
Measuring Temperature
Temperature vs. Heat
Atoms
Electrons
Conduction
Volume and Density
Buoyancy
Convection
Heat as Energy
Radiation Waves
The Radiation Spectrum
