DE Science Elementary “5-Minute Prep” For Forces and Motion Simple Machines Types of Simple Machines Types of Simple Machines – The Big Ideas • The six types of simple machines are the lever, inclined plane, wheel, pulley, wedge, and screw. • A lever is a rigid bar that can move at a fulcrum, or fixed point. • An inclined plane is a flat slanted surface. • A wheel is a round disk that rotates around a central axle. • A pulley is a small wheel with a grooved rim using a rope to change direction of a pulling force. • A wedge is an inclined plane with one or two sloping sides. • A screw is an inclined plane wrapped around a cylinder. • A complex machine is a machine made of two or more simple machines. Types of Simple Machines – Prior Knowledge Students are fascinated by objects in motion and simple machines. It will help for students to use the FUNdamental, Making Things Move, to review forces and motion. It will also be helpful if students have observed or interacted with toys and other objects that are simple machines. Types of Simple Machines – Common Misconceptions • Machines make less work for people. – Reality: A machine does not decrease the amount of work. Instead, a machine makes work easier by changing the size or direction of the force. • Machines must have a motor. – Reality: A machine is a device that transmits and modifies force. It does not have to have a motor. There are different types of simple machines which include the lever, inclined plane, wheel, pulley, wedge, and screw. Types of Simple Machines – Using DE Science Content When you close this presentation, you can review the following recommended resources for Types of Simple Machines. • • • • Exploration: Types of Simple Machines Reading Passage: Let’s Play While We Work Video: The Lever Video: The Wheel and Axel Use the PowerPoint version of this presentation for hyperlinks to these resources or you can get to them through the browser or search feature. Types of Simple Machines – Instructional Ideas • Create Rube Goldberg machine with at least two different types of simple machines in it. – Rube Goldberg was a Pulitzer Prize winning cartoonist, sculptor, and author whose drawings depict absurdly-connected machines functioning in extremely complex ways to produce a simple result, i.e. squeezing toothpaste on a toothbrush. – Each design needs a drawing and a paragraph describing how the task is more complex and which simple machines are connected to complete the task. Types of Simple Machines – Instructional Ideas • Create a simple machine scavenger hunt in the classroom. – Students can record the type of simple machine that they find by drawing a picture of it and writing what the machine does. – Students can also complete this activity as a home scavenger hunt for homework. State Standards: If you wish to review your state standards regarding Simple Machines, click here to get to the curriculum standards search feature of DES. http://discoveryeducation.com/forward/curriculum.cfm You can click on any standard to see what resources are available to teach it. Additional Information: For additional content, check the Extend section within the concept.