Fill in the Blanks SIMPLE MACHINES Online version - Review of vocabulary related to the topics "machines" 3rd PRIMARY by Jesús Pérez Perez 1 parts work simple pulley effort energy travel machines move help 1 . Machines us to do something . 2 . Machines make easier . 3 . Simple machines often have one or two . 4 . An inclined plane reduce the you need to weights . 5 . Machines use . 6 . A lever , a pulley , a wheel are . 7 . We use a to lift weights . 8 . A wheel helps us to .