CK-12 Physical Science Concepts - For Middle School

5.82. Why Earth Is a Magnet http://www.ck12.org 5.82 Why Earth Is a Magnet Describe how Gilbert discovered that Earth is a magn ...

http://www.ck12.org Chapter 5. Energy lines of magnetic force move from the north to the south magnetic pole. Spinning Like a To ...

5.82. Why Earth Is a Magnet http://www.ck12.org Explore More At the following URL, watch the video to gain a deeper understandin ...

http://www.ck12.org Chapter 5. Energy 5.83 Using Earth’s Magnetic Field Describe Earth’s magnetic field. Explain how Earth’s ma ...

5.83. Using Earth’s Magnetic Field http://www.ck12.org FIGURE 5.180 Finding the Way Another benefit of Earth’s magnetic field is ...

http://www.ck12.org Chapter 5. Energy Summary Earth has north and south magnetic poles and a magnetic field called the magnetos ...

5.84. Electromagnetism http://www.ck12.org 5.84 Electromagnetism Define electromagnetism. State the right hand rule. Explain wh ...

http://www.ck12.org Chapter 5. Energy the current is known. The rule is illustrated in theFigure5.182. When the thumb of the rig ...

5.84. Electromagnetism http://www.ck12.org Vocabulary electromagnetism: Magnetism produced by electric current. Explore More W ...

http://www.ck12.org Chapter 5. Energy 5.85 Discovery of Electromagnetism Describe the accidental discovery of electromagnetism. ...

5.85. Discovery of Electromagnetism http://www.ck12.org FIGURE 5.183 An Accidental Discovery In 1820, Oersted was presenting a d ...

http://www.ck12.org Chapter 5. Energy FIGURE 5.184 induction. It occurs when a conductor, such as a wire, crosses lines of force ...

5.85. Discovery of Electromagnetism http://www.ck12.org Explore More At the following URL, review Oersted’s discovery of electro ...

http://www.ck12.org Chapter 5. Energy 5.86 Solenoid Describe a solenoid. Explain how to strengthen the magnetic field of a sole ...

5.86. Solenoid http://www.ck12.org FIGURE 5.185 Strength of a Solenoid Any wire with current flowing through it has a magnetic f ...

http://www.ck12.org Chapter 5. Energy FIGURE 5.186 This pinball machine uses several solenoids to operate bumpers, switches, and ...

5.87. Electromagnet http://www.ck12.org 5.87 Electromagnet Describe an electromagnet. Explain why electromagnets are very stron ...

http://www.ck12.org Chapter 5. Energy FIGURE 5.187 Easy On and Off Besides their strength, another pro of electromagnets is the ...

5.87. Electromagnet http://www.ck12.org When the amplitude of the alternating current is greater, the strength of the magnetic ...

http://www.ck12.org Chapter 5. Energy 5.88 Electromagnetic Devices Define electromagnet and identify electromagnetic devices. E ...