Simple Machines Make Work Easier

Grade 3 Science Discovering how machines help us every day

What Helps You Do Work More Easily?

Think about tasks you do at home What tools make jobs easier? Share your ideas with the class

What is a Simple Machine?

A tool that makes work easier Changes how much force we need Changes the direction of force Found everywhere in our daily lives

The Six Simple Machines

Lever and Wheel & Axle

{"left":"Lever: A bar that turns on a point\nExamples: seesaw, scissors, bottle opener\nMakes lifting and moving easier","right":"Wheel and Axle: A wheel attached to a rod\nExamples: doorknob, bicycle, car steering wheel\nHelps us turn and move things with less effort"}

Pulley and Inclined Plane

{"left":"Pulley: A wheel with a rope or chain\nExamples: flagpole, window blinds, crane\nChanges direction of force to lift things","right":"Inclined Plane: A slanted surface or ramp\nExamples: wheelchair ramp, slide, stairs\nMakes it easier to move things up or down"}

Screw and Wedge

{"left":"Screw: An inclined plane wrapped around a cylinder\nExamples: wood screw, jar lid, spiral staircase\nHolds things together or moves them forward","right":"Wedge: Two inclined planes back-to-back\nExamples: knife, axe, zipper, teeth\nSplits things apart or holds them together"}

Simple Machine Hunt!

Look around our classroom Find examples of simple machines Work with a partner Share what you discover