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Forces & Motion Unit with Simple Machines

Forces & Motion Unit with Simple Machines. Brooke M. McFry Science Grade 3 ALCOS 4, 5 2011. Read Aloud. KWL. Directed Inquiry . Scott Foresman SCIENCE text page 324: “How can you describe motion?” 1. Make two ramps, each of a different height.

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Forces & Motion Unit with Simple Machines

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  1. Forces & Motion Unit withSimple Machines Brooke M. McFry Science Grade 3 ALCOS 4, 5 2011

  2. Read Aloud • KWL

  3. Directed Inquiry Scott Foresman SCIENCE text page 324: “How can you describe motion?” 1. Make two ramps, each of a different height. 2. Let go of a ball from the top of each ramp at the same time. 3. Observe how each ball moves down the ramp. Does its speed increase or decrease? Which reaches the bottom first? 4. After each ball reaches the bottom, does its speed increase or decrease? Explain Your Results 1. Which ball moved faster? Describe the location of each ball when it stops moving. Which was farther from the ramp? 2. Compare how a ball’s speed changes before and after reaching the bottom of the ramp. Describe the two types of motion that you observed.

  4. Vocabulary • force • motion • work • push • pull • speed • gravity • friction • simple machines • inclined plane • wedge • screw • lever • pulley • wheel and axle • complex machines

  5. force A force is a push or a pull.

  6. motion Motion is a change in the position of an object.

  7. work Work is what happens when a force moves an object over a distance.

  8. push A push occurs when you move an object away from you.

  9. pull A pull occurs when you move an object toward you.

  10. speed Speed is the rate at which an object changes position.

  11. gravity Gravity is a non-contact force that pulls objects toward each other.

  12. friction Friction is a contact force that opposes the motion of an object.

  13. Day 3 – text pages 340-343

  14. Simple Machines Simple machines make work easier.

  15. inclined plane An inclined plane is a simple machine that has a slanting surface that connects a lower level to a higher level.

  16. wedge A wedge is a simple machine made up of two slanted sides that end in a sharp edge.

  17. screw A screw is a simple machine that has an inclined plane that is wrapped around a center post.

  18. lever A lever is a simple machine in which a stiff bar that rests on a post and is used to lift or move things.

  19. pulley A pulley is a simple machine that changes the direction of motion of an object to which a force is applied.

  20. wheel & axel A wheel and axel is a simple machine made of a wheel and a rod joined to the center of the wheel.

  21. Lesson 1: What happens when things change position? Let’s Jigsaw Read! A. Page 327 B. Page 328-329 C. Page 330-331 Read your section, answer the Checkpoint Questions, and be ready to present your section to the class.

  22. Lesson 2: How does force affect motion? Let’s Jigsaw Read! A. Page 332-333 B. Page 334-335 C. Page 336-337 Read your section, answer the Checkpoint Questions, and be ready to present your section to the class.

  23. Lesson 3: How do simple machines affect work? Let’s Read pages 338-339 Together! Then, read about your simple machine: Page 330 – Inclined Plane Page 330 – Wedge Page 331 – Screw Page 331 – Lever Page 332 – Wheel and axle Page 333 - pulley Read your section and be ready to present your section to the class.

  24. Interactive Web Sites & More Forces & Motion Simple Machines • First School Years • Resources • Edheads • Examples • More Examples

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