STEM Concepts/Index by season

This is the list of the STEM concepts mentioned on the show to date, grouped by season with pictures associated with each one. To see the index by name, click here. Season 1 Buoyancy (Blaze of Glory) Force (The Driving Force) Friction (Tool Duel) Adhesion (The Bouncy Tires) Wind power (Epic Sail) Acceleration (Stuntmania!) Balance (The Jungle Horn) Mass (The Team Truck Challenge) Trajectory (Cake-tastrophe!) Levers (Truckball Team-Up) Magnets (The Mystery Bandit) Inertia (Gasquatch!) Sound waves (Truck Rangers) Angles (Trouble at the Truck Wash) Wedges (Zeg and the Egg) Springs (Runaway Rocket) Currents (Cattle Drive) Investigating (Dragon Island Duel) Freezing (Sneezing Cold) Season 2 Valves (Fired Up!) Designing (Dino Dash) Shadows (Truck or Treat!) Momentum (Race to the Top of the World) Engineers (Monster Machine Christmas) Potential energy (Knight Riders) Energy (Darington to the Moon!) Pendulums (Piggy 500) Structural engineering (Spark Bug) Volume (Five Alarm Blaze) Rotational speed (Axle City Grand Prix) Combustion (Treasure Track) Tensile strength (Rocket Ski Rescue) Chain reactions (Dinosaur Parade) Aerodynamics (Race Car Superstar) Velocity (Race to Eagle Rock) Clouds (Sky Track) Centripetal force (The Wishing Wheel) Elasticity (Pickle Power) Season 3 Collision (Dinocoaster) Hydraulics (The Hundred Mile Race) Melting (The Polar Derby) Light (Light Riders) Kinetic energy (Catch That Cake!) Boiling (The Bouncing Bull Racetrack) Counterweight (Mega Mud Robot) Pulley (Knighty Knights) Torque (Tow Truck Tough) Vortex (Race for the Golden Treasure) Propulsion (Need for Blazing Speed) Fasteners (Fast Friends) Electricity (Raceday Rescue) Incline (Defeat the Cheat) Season 4 Comparison (The Chicken Circus!) Load (The Pickle Family Campout) Robotics (Robot Power) Mechanical engineering (The Super-Size Prize) Traction (Power Tires) Strong force (Ninja Blaze) Snowflakes (Snow Day Showdown) Drafting (Construction Crew to the Rescue) Deduction (Officer Blaze) Patterns (The Flying Lion) Metal (Royal Rescue) Calculators, Addition (The 100 Egg Challenge) Symmetry (Blaze and the Magic Genie) Circuits (The Midnight Mile) Suction (Ninja Soup) Season 5 Momentum (again) (The Island of Lost Treasure) Adaptive Traits (AJ to the Rescue) Photons (The Trophy Chase) Gears (Babysitting Heroes) Measure (Abra-Ka-Pickle!)