1. NEW CHAPTER Circuits and Electronics CHAPTER the BIG idea Circuits control the flow of electric charge. Charge needs a continuous path to flow. Circuits make electric current useful. Electronic technology is based on circuits. CHAPTER OUTLINE 20.1 20.2 20.3 CHAPTER RESOURCES

2. VOCABULARY KEY CONCEPT CHAPTER HOME short circuit resistor Charge needs a continuous path to flow. SECTION OUTLINE SECTION OUTLINE circuit Charge flows in a closed path. Circuits provide a closed path for current. Circuit parts include voltage sources, switches, conductors, and electrical devices such as resistors. 20.1 CHAPTER RESOURCES CHAPTER RESOURCES

3. VOCABULARY KEY CONCEPT CHAPTER HOME short circuit resistor Charge needs a continuous path to flow. SECTION OUTLINE SECTION OUTLINE circuit Charge flows in a closed path. Circuits provide a closed path for current. Circuit parts include voltage sources, switches, conductors, and electrical devices such as resistors. 20.1 CHAPTER RESOURCES CHAPTER RESOURCES

4. VOCABULARY KEY CONCEPT CHAPTER HOME short circuit resistor Charge needs a continuous path to flow. SECTION OUTLINE SECTION OUTLINE circuit Charge flows in a closed path. Circuits provide a closed path for current. Circuit parts include voltage sources, switches, conductors, and electrical devices such as resistors. 20.1 CHAPTER RESOURCES CHAPTER RESOURCES

5. VOCABULARY KEY CONCEPT CHAPTER HOME short circuit resistor Charge needs a continuous path to flow. SECTION OUTLINE SECTION OUTLINE circuit Charge flows in a closed path. Circuits provide a closed path for current. Circuit parts include voltage sources, switches, conductors, and electrical devices such as resistors. 20.1 Build a virtual circuit. SIMULATION CHAPTER RESOURCES CHAPTER RESOURCES

6. VOCABULARY KEY CONCEPT CHAPTER HOME A closed path through which charge can flow. circuit KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Charge needs a continuous path to flow. short circuit resistor circuit 20.1 CHAPTER RESOURCES CHAPTER RESOURCES

7. VOCABULARY KEY CONCEPT CHAPTER HOME An electrical device that slows the flow of charge in a circuit. resistor KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Charge needs a continuous path to flow. short circuit resistor circuit 20.1 CHAPTER RESOURCES CHAPTER RESOURCES

8. VOCABULARY KEY CONCEPT CHAPTER HOME An unintended and undesired path connecting one part of a circuit with another. short circuit KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Charge needs a continuous path to flow. short circuit resistor circuit 20.1 CHAPTER RESOURCES CHAPTER RESOURCES

9. VOCABULARY KEY CONCEPT CHAPTER HOME SECTION OUTLINE SECTION OUTLINE Circuits make electric current useful. parallel circuit series circuit Each device in a series circuit is wired on a single path. 20.2 CHAPTER RESOURCES CHAPTER RESOURCES

10. VOCABULARY KEY CONCEPT CHAPTER HOME SECTION OUTLINE SECTION OUTLINE Circuits make electric current useful. parallel circuit series circuit Each device on a parallel circuit has its own connection to the voltage source. 20.2 CHAPTER RESOURCES CHAPTER RESOURCES

11. VOCABULARY KEY CONCEPT CHAPTER HOME A circuit in which current follows a single path. Each device that is wired in a series circuit shares a path to and from the voltage source. series circuit KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Circuits make electric current useful. parallel circuit series circuit 20.2 CHAPTER RESOURCES CHAPTER RESOURCES

12. VOCABULARY KEY CONCEPT CHAPTER HOME A circuit in which current follows more than one path. Each device that is wired in a parallel circuit has its own path to and from the voltage source. parallel circuit KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Circuits make electric current useful. parallel circuit series circuit 20.2 CHAPTER RESOURCES CHAPTER RESOURCES

13. VOCABULARY KEY CONCEPT CHAPTER HOME When the picture is input through the scanner, the image is broken down into pixels. Electronic technology is based on circuits. SECTION OUTLINE SECTION OUTLINE binary code digital electronic analog computer Electronic devices use electrical signals to represent coded information. Computers process information in digital code which uses 1s and 0s to represent the information. 20.3 CHAPTER RESOURCES CHAPTER RESOURCES

14. VOCABULARY KEY CONCEPT CHAPTER HOME Electronic technology is based on circuits. SECTION OUTLINE SECTION OUTLINE binary code digital electronic analog Each pixel is translated into binary code representing a color. computer code for this pixel: 00110110 00000000 00011011 Electronic devices use electrical signals to represent coded information. Computers process information in digital code which uses 1s and 0s to represent the information. 20.3 CHAPTER RESOURCES CHAPTER RESOURCES

15. VOCABULARY KEY CONCEPT CHAPTER HOME The binary code is then stored on the computer’s hard drive. Electronic technology is based on circuits. SECTION OUTLINE SECTION OUTLINE binary code digital electronic analog computer Electronic devices use electrical signals to represent coded information. Computers process information in digital code which uses 1s and 0s to represent the information. 20.3 CHAPTER RESOURCES CHAPTER RESOURCES VISUALIZATION See how hard drives store information.

16. VOCABULARY KEY CONCEPT CHAPTER HOME adj. Operating by means of an electrical signal. An electronic device is a device that uses electrical current to represent coded information. electronic KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Electronic technology is based on circuits. binary code digital electronic analog computer n. An electronic device or system, such as a computer, calculator, CD player, or game system. 20.3 CHAPTER RESOURCES CHAPTER RESOURCES

17. VOCABULARY KEY CONCEPT CHAPTER HOME A coding system in which information is represented by two figures, such as 1 and 0. binary code KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Electronic technology is based on circuits. binary code digital electronic analog computer 20.3 CHAPTER RESOURCES CHAPTER RESOURCES

18. VOCABULARY KEY CONCEPT CHAPTER HOME Represented by numbers. In electronics, digital information is represented by the numbers 1 and 0, signaled by a circuit that is either on or off. digital KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Electronic technology is based on circuits. binary code digital electronic analog computer 20.3 CHAPTER RESOURCES CHAPTER RESOURCES

19. VOCABULARY KEY CONCEPT CHAPTER HOME Represented by a continuous but varying quantity, such as a wave. In electronics, analog information is represented by a continuous but varying electrical signal. analog KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Electronic technology is based on circuits. binary code digital electronic analog computer 20.3 CHAPTER RESOURCES CHAPTER RESOURCES

20. VOCABULARY KEY CONCEPT CHAPTER HOME An electronic device that processes digital information. computer KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Electronic technology is based on circuits. binary code digital electronic analog computer 20.3 CHAPTER RESOURCES CHAPTER RESOURCES

21. VOCABULARY KEY CONCEPT CHAPTER HOME KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY I. Charge needs a continuous path to flow. A. Electric charge flows in a loop. 1. The Parts of a Circuit 2. Open and Closed Circuits 1. How Fuses Work 2. Other Safety Devices C. Safety devices control current. B. Current follows the path of least resistance. Charge needs a continuous path to flow. short circuit resistor circuit 1. Short Circuits 2. Grounding a Circuit 20.1 CHAPTER RESOURCES CHAPTER RESOURCES

22. VOCABULARY KEY CONCEPT CHAPTER HOME II. Circuits make electric current useful. A. Circuits are constructed for specific purposes. B. Circuits can have multiple paths. C. Circuits convert electrical energy into other forms of energy. KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Circuits make electric current useful. 1. Series Circuits 2. Parallel Circuits parallel circuit series circuit 20.2 CHAPTER RESOURCES CHAPTER RESOURCES

23. VOCABULARY KEY CONCEPT CHAPTER HOME III. Electronic technology is based on circuits. KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY A. Electronics use coded information. B. Computer circuits process digital information. 1. Binary Code 2. Digital Information 1. Integrated Circuits 2. Personal Computers Electronic technology is based on circuits. binary code digital electronic analog computer 3. Analog to Digital C. Computers can be linked with other computers. 1. The Origin of the Internet 2. The Internet Today 20.3 CHAPTER RESOURCES CHAPTER RESOURCES

24. CHAPTER HOME Image Gallery Click on the icons to see a larger image or animation. Build a virtual circuit. SIMULATION VISUALIZATION See how hard drives store information.

25. CHAPTER HOME Image Gallery BACK TO IMAGE GALLERY

26. CHAPTER HOME Image Gallery BACK TO IMAGE GALLERY

27. CHAPTER HOME Image Gallery BACK TO IMAGE GALLERY

28. CHAPTER HOME Image Gallery BACK TO IMAGE GALLERY

29. BACK TO CHAPTER Click on the items below to access resources on Standardized Test Practice Practice state standardized tests Math Tutorial Review math concepts Resource Centers Get more information on select science topics Content Review Review key concepts and vocabulary Audio Readings Hear chapter audio readings CLASSZONE.COM Chapter Resources CHAPTER HOME Animations Link to all the McDougal Littell Science animations Review Game Play a fun interactive review game Image Gallery Click here to review chapter images and animations