⚙️
Grade 4 Science · World 9: Machine Workshop · Level 61
Machines All Around
Spot simple machines in tools and toys, and machines made of several, like scissors and bikes.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 61
- Simple machines are everywhere. Let's go on a hunt: a doorknob, a jar lid, a slide, a doorstop, window blinds, and a seesaw.
- Many tools join simple machines together. Scissors have two levers, and their blades are wedges.
- A wheelbarrow is a lever with a wheel and axle. The wheel is the fulcrum, and your hands lift the handles.
- A bike has wheels and axles, and its brake handles are levers.
Georgia Standards of Excellence in Science:
- S4P3.c — Ask questions to identify and explain the uses of simple machines (lever, pulley, wedge, inclined plane, wheel and axle, and screw) and how forces are changed when simple machines are used to complete tasks. (Clarification statement: The use of mathematical formulas is not expected.)