Technology: Age 14

10 illustrated Technology lessons for Age 14.

Rack and pinion A round toothed wheel has its teeth sunk into the slots of a flat toothed bar lying under it. When the wheel t…
Interactive Small Gear Turns Large Gear A small gear with a hand crank meshes with a larger gear. The larger gear turns more slowly and with greater t…
Battery, Motor, Gear, Wheel A battery sends electrical energy through a wire to a motor. The motor turns a gear and a wheel, changing elec…
Battery Fan Energy Chain A battery sends electrical energy through wires and a switch to a motor. The motor turns the fan blades, while…
Aircraft Inspection Levels Aircraft are inspected on schedules that range from quick daily fluid checks to deep tear-downs. Each deeper c…
One Key, Two Results A stored program is a sequence of instructions that tells the processor which circuits to use. The same key pr…
Transgenic Plant A useful gene is taken from one organism and put into plant cells. The modified cells are grown into plants an…
Microscope Bench with Monitor A light microscope and a tall electron microscope stand side by side on a lab bench. The electron microscope s…
Sensors on the Seabed Instruments resting on the ocean floor feel the pressure and the shaking of a large earthquake. A buoy carries…
Bulb and Tube Incandescent bulbs make light by heating a thin wire until it glows. Fluorescent and discharge lamps give more…