read the text.\na gear is a wheel with teeth. when the teeth of two gears roll together, or mesh, one gear…

read the text.\na gear is a wheel with teeth. when the teeth of two gears roll together, or mesh, one gear can move the other. how a gear works depends partly on its shape and the angle of its teeth. for example, a spur gear has teeth parallel to its axis of rotation (the line around which the gear spins), while a helical gear has teeth diagonal to its axis. helical gears diagonal teeth mesh more gradually, making them quieter than spur gears. with bevel gears, one gear lies flat, spinning left to right, while the other stands upright, spinning top to bottom. this positioning—along with their cone - like shape—allows bevel gears to change vertical motion into horizontal motion (and vice versa). worm gears combine a screw (a little like a regular screw) and a spur gear. the screw can move the spur gear but usually not the other way around. this property is useful for machines that need a braking system, like elevators.\nwhich term matches the picture?\nspur gear\nbevel gear\nworm gear\nhelical gear

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