A scarecrow is a human-shaped device that people put near crops to scare off birds. The idea is that the birds think the scarecrow is a real person and will stay away from it.
Sis forSewing machine
A sewing machine is a device, usually powered by an electric motor, that can sew much neater and straighter than you can by hand. Modern sewing machines have lots of different stitches built into them. Some sewing machines can even connect to a computer and stitch very intricate embroidery from pictures on the computer automatically.
A shutter is a device found inside a camera that lets light through for a short time. The longer the shutter is open, the more exposed the resulting photograph is. You need to have the shutter open longer when there isn't much light.
A speaker, or loudspeaker, is a device that converts electrical signals into sound. They do this by using that electrical signal to vibrate a cone-shaped device at particular frequencies that are encoded by the signal, which produces sound. Larger cones are better at making low sounds, smaller ones are better at making high sounds.
Sis forSpinning wheel
A spinning wheel is a device that is used to spin fibres like animal hair or linen into thread or yarn. Spinning wheels of various designs have been in use for hundreds of years. Spinning wheels are usually powered by a foot treadle or turning them by hand.
Today, yarn is made on a much larger scale by machines, powered by motors.
