Simple Machines are Everywhere on the Farm Source: Agriculture in the Classroom-Manitoba Free With this activity sheet, students learn to identify simple machines – wheels, wedges, pulleys, gears, levers, etc. – found on farm machines such as tractors, combines and air drills. Along the way, they discover where their food comes from and explore how science and technology have increased productivity on the farm. Curriculum connections to Grade 5 Science unit Forces and Simple Machines Simple Machines on the Farm - Teacher Guide, Answer Key, Worksheet