56A Motors and Generators

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56A Motors and Generators Key Vocabulary motor generator electromagnetism

56A Motors and Generators Identify objects you have seen in the past week that are magnetic Record your list in your notebook.

56A Motors and Generators How do you know if something is magnetic? Share your thoughts with the class.

56A Motors and Generators Set up Set up the compass, bar magnets, and wire coil as your teacher instructs. Predict what will happen if the compass is moved close to the wire coil.

56A Motors and Generators Teacher demonstration What does the movement of the compass indicate?

56A Motors and Generators Read the introduction and look for key ideas Electric motors run many devices, both large and small.

56A Motors and Generators How can you make a motor spin faster?

56A Motors and Generators Complete procedure steps 1-4

56A Motors and Generators What do you think will happen when two magnets are placed close to one another? Share your thoughts with the class.

56A Motors and Generators Complete procedure steps 5-7 SCORING GUIDE: Designing Investigations

56A Motors and Generators Complete procedure steps 8-11 In a motor, a current creates a magnetic field, which interacts with another magnetic field to produce a spinning motion. Do you think this sequence could be reversed?

56A Motors and Generators Complete procedure step 12

56A Motors and Generators Analysis question 1 Electromagnetism refers to the magnetism that occurs when electric charges are in motion. What evidence did you observe for the existence of electromagnetism in this activity?

56A Motors and Generators Analysis question 2 What does an electric motor need in order to work?

56A Motors and Generators Analysis question 3 What does an electric generator need in order to work?

56A Motors and Generators Analysis question 4 Using evidence from your investigation, describe the variables that influence how fast a motor spins.

56A Motors and Generators Analysis question 5 Predict the variables that would affect the amount of electricity a generator generates. Explain the reasoning behind your prediction.

56A Motors and Generators SCORING GUIDE: Understanding Concepts

56A Motors and Generators What are the structural similarities of motors and generators? Share your thoughts with the class.

56A Motors and Generators How can you make a motor spin faster?

56A Motors and Generators Key vocabulary definitions Electric motor – A device that converts electrical energy into mechanical energy.

56A Motors and Generators Key vocabulary definitions Generator - A machine for making electricity, generally by the circular movement of a turbine, driven by steam or water, connected to a magnet that revolves inside another magnet. When a magnet moves inside another magnet, an electric current results. This current can be transmitted for immediate use, or stored for later use.

56A Motors and Generators Key vocabulary definitions Electromagnetism - Magnetism associated with moving electrical charges.

56A Motors and Generators Design Design an experiment to investigate how changes to the coil affect how fast a motor spins.