Magnetism S8P5: Obtain, evaluate, and communicate information about gravity, electricity, and magnetism as major forces acting in nature.

Transcription

1 Magnetism S8P5: Obtain, evaluate, and communicate information about gravity, electricity, and magnetism as major forces acting in nature. A. Construct an argument using evidence to support the claim that fields exist between objects exerting forces on each other even when the objects a re not in contact. C. Plan and carry out investigations to identify the factors that affect the strength of electric and magnetic forces. Term Info Picture Magnetism a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects. Magnet any material that attracts iron or materials containing iron Magnetic Field a region where a magnetic force can be detected Magnetic Pole one of two points, such as the ends of a magnet, that have opposing magnetic qualities Magnetic Force the force of attraction or repulsion generated by moving or spinning electric charges Attract Pull towards.

2 Repel Force away Electromagnet a coil that has a soft iron core and that acts as a magnet when an electric current is in the coil Solenoid a coil of wire with an electric current in it Temporary Magnet A temporary magnet is a magnet that stays magnetized only for a relatively short period of time. Permanent Magnet a magnet that retains its magnetic properties in the absence of an inducing field or current. Magnetic Domains a region composed of a group of atoms whose magnetic fields are aligned in the same direction

3 Compass an instrument containing a magnetized pointer that shows the direction of magnetic north and bearings from it. Geographic North vs. True North North Pole of Earth vs. the direction in which the north end of a compass needle will point in response to the earth's magnetic field. Aurora a natural electrical phenomenon characterized by the appearance of streamers of reddish or greenish light in the sky, usually near the northern or southern magnetic pole. Generator a device that converts mechanical energy to electrical energy. Learning Targets: 1. I can describe how magnets behave and identify their poles. 2. I can demonstrate how magnets attract and repel each other. 3. I can describe how the domains line up when an item is magnetic. 4. I can classify magnets based on how they behave. 5. I can build and test an electromagnet. 6. I can identify the relationship between electric current and a magnetic field. 7. I can compare solenoids and electromagnets. 8. I can describe how electromagnets are used in doorbells and electric motors. 9. I can explain how a magnetic field can generate an electric current.

4 Magnetism S8P5: Obtain, evaluate, and communicate information about gravity, electricity, and magnetism as major forces acting in nature. A. Construct an argument using evidence to support the claim that fields exist between objects exerting forces on each other even when the objects a re not in contact. C. Plan and carry out investigations to identify the factors that affect the strength of electric and magnetic forces. Term Info Picture Magnetism Magnet Magnetic Field Magnetic Pole Magnetic Force Attract

5 Repel Electromagnet Solenoid Temporary Magnet Permanent Magnet Magnetic Domains

6 Compass Geographic North vs. True North Aurora Generator Learning Targets: 1. I can describe how magnets behave and identify their poles. 2. I can demonstrate how magnets attract and repel each other. 3. I can describe how the domains line up when an item is magnetic. 4. I can classify magnets based on how they behave. 5. I can build and test an electromagnet. 6. I can identify the relationship between electric current and a magnetic field. 7. I can compare solenoids and electromagnets. 8. I can describe how electromagnets are used in doorbells and electric motors. 9. I can explain how a magnetic field can generate an electric current.