Technology: Age 11

12 illustrated Technology lessons for Age 11.

Gears turning each other When two gears mesh, their teeth push each other, so one turns the opposite way to the other. A big gear drive…
Gears That Turn Each Other When you turn a gear, its teeth push the teeth of the next gear, so that gear turns the other way. If a big ge…
Interactive Rear gears on a bicycle A bicycle chain can sit on different cogs at the rear wheel. Moving the chain from one cog to another changes …
Interactive Water Clock A water clock uses a thin stream of water that falls at a steady rate. As the lower tank fills, a float rises …
Bicycle Parts and Materials A bicycle is made of parts that each do a job. The material of every part is chosen so it works well, for exam…
Interactive Sunlight to Spinning Propeller A solar cell catches sunlight and makes electricity. That electricity travels along wires to a small motor, wh…
Plastic Bottle Recycling Used plastic bottles are collected and taken to a recycling plant. There they are washed, chopped into tiny fl…
Flat Pictures and Solid Models A drawing on paper shows one view and stays flat. A built model has real thickness, so a camera can move aroun…
Drone, Station, and Satellite An unmanned aircraft flies while a ground station and its operators send commands and receive pictures. Radio …
Orb Web Stages A spider builds an orb web in steps, starting with a single thread that drifts across a gap. It then adds a th…
Testing Spacecraft Step by Step Before a Moon landing, engineers test each part and move on its own flight. They check one job at a time, then…
Sails and Wind Turbines Moving air pushes hard on anything in its way. Sails catch that push to move a boat, and turbine blades turn i…