Physics
A $ denotes that an activity is a product where purchase is required; all other activities are free.
Balanced & Unbalanced Forces
Generation Genius: Drop an Egg into a Cup
Balanced & Unbalanced Forces Demos (Google Doc)
Newton's Laws of Motion
Newton's Laws Demos
Lots of Toy Car Experiments for a Variety of Topics
Potential & Kinetic Energy/Conservation of Energy
Cardboard Tube Marble Run (Fun challenge idea: make it a race and the slowest time wins!)
Speed, Velocity, & Acceleration
Work & Horsepower
Calculate Individual Work and Horsepower
Simple Machines
Design or Build a Rube Goldberg Machine
Properties of Waves
Exploratorium Science Snacks: Slinky in Hand
Electromagnetic Spectrum
Exploratorium Science Snacks: CD Spectroscope
Teach Engineering: Waves Go Public!
Visible Light Waves
Exploratorium Science Snacks: Three Little Pigments
Exploratorium: Science Snacks: Colored Shadows
Teach Engineering: Stations of Light
Gummy Bear Light Absorption (.pdf)
Sound Waves
If your students have iPads, the Garage Band app is a great tool to explore properties of sound.
Teach Engineering: Seeing & Feeling Sound Vibrations
Acoustics: Simple Activities to Explore the Science of Sound
Making Sound Waves (Eardrum Activity)
17 Misc. Sound Wave Activities
Sound Measurement Kit (You may already have the tools to make this.)