An abacus is a ancient device that is used for arithmetic calculations.
Ailerons are the outer flaps on the rear surface of the wings of an airpane. Ailerons are used to keep the airplane from rollling from side to side.
Airplanes fly in the sky.
A light bulb turns electricity into light.
You can take pictures with a camera.
A can opener is a device that opens cans.
A device is a piece of equipment that does a job. For example, a can opener is a device that opens cans.
An electrical outlet is a device that is connected to an electrical supply. We plug electrical devices into an outlet so they can receive power. Outlets are usually mounted on a wall.
The engine of a train pulls the railroad cars along the track.
The engines of an airplane propel it through the air.
A fan is a machine that makes a breeze.
A flashlight helps you find your way in the dark.
A freezer keeps things icy.
A funnel is a device that lets you pour things from one container to another.
A gyroscope is a spinning wheel set in a movable frame. When the wheel spins, it is very hard to move the gyroscope - it essentially stays in its original orientation.
A clothes hanger is used to hold up an item of clothing in a closet.
An incandescent light bulb turns electricity into light as an electric current causes a filament to glow in an air-free enclosure.
An inventor designs and creates new, useful things.
Irons press the wrinkles out of clothes.
A joystick is used to play some computer games.
You can lock and unlock a lock with a key.
A magnifying glass is a lens that makes things look larger than they really are.
A microscope lets you see very tiny things.
Microwave ovens heat up food quickly.
You can see your reflection in a mirror.
You can lock and unlock a padlock with a key.
A paper clip is a small clip that is used to hold a few pieces of paper together.
Pliers are tools that hold things.
Radar is a device that uses reflected radio waves to located objects at a distance. Radar is short for “radio detection and ranging.”
A radio lets you hear broadcast music and talk shows.
A refrigerator is a machine that keeps food cold.
A remote control lets you operate a machine from far away.
A rocket is a machine that propels itself into space.
A safety pin is a type of pin that is used to fasten clothes and diapers.
A scale is a machine for weighing things.
A sewing machine sews stitches very quickly and easily. The sewing machine was invented in 1846 by Elias Howe.
In sonar (also called echolocation), a high-pitched sound (usually clicks) is sent out. The sound bounces off the object and some returns. The returning echo is interpreted to determine the object’s shape, direction, distance, and texture. Dolphins (and other toothed whales) and some bats use sonar to navigate and find prey.
You can talk with people who are far away by using a telephone.
A telescope is a optical device that makes faraway objects appear closer and larger, allowing us to see distant objects in space.
A television is a machine that receives pictures and sounds. People watch and listen to shows on television.
A thermometer is used for determining what the temperature is.
A toaster is a machine that heats up slices of bread, making toast.
A vacuum cleaner is a device used to clean rugs and floors.
A yoke is a device that holds two working animals (like oxen) together.