To return to the chapter summary click Escape or close this document. glencoe.com Image Bank Foldables Video Clips and Animations Standardized Test Practice Chapter Resources Click on one of the following icons to go to that resource. Chapter Review Questions Chapter Summary

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To return to the chapter summary click Escape or close this document. Image Bank Click on individual thumbnail images to view larger versions.

To return to the chapter summary click Escape or close this document. Image Bank To transfer images to your own power point follow the following steps: Open the “Resource” file from the CD-ROM disc – view the file in the “normal view” or “slide sorter view” mode - go to slide #2 – from there you can click through the images and follow these instructions. Click once on the image. Copy the image Go to your own power point document Paste the image. Transfer Images

To return to the chapter summary click Escape or close this document. Image Bank Electricity

To return to the chapter summary click Escape or close this document. Image Bank Van der Graaf Generator

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To return to the chapter summary click Escape or close this document. Foldables Electricity Make the following Foldable to help you understand the terms electric charge, electric current, and electric circuit.

To return to the chapter summary click Escape or close this document. Foldables Fold the top of a vertical piece of paper down and the bottom up to divide the paper into thirds.

To return to the chapter summary click Escape or close this document. Foldables Turn the paper horizontally; unfold and label the three columns as shown.

To return to the chapter summary click Escape or close this document. Foldables Before you read the chapter, write a definition of electric charge, electric current, and electric circuit in the appropriate column. As you read the chapter, correct your definition and add additional information about each term. Read and Write

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To return to the chapter summary click Escape or close this document. The two types of electric charge are positive and negative. Like charges repel and unlike charges attract. Electric Charge An object becomes negatively charged if it gains electrons and positively charged if it loses electrons. 1 1 Reviewing Main Ideas

To return to the chapter summary click Escape or close this document. Electric Charge 1 1 Reviewing Main Ideas Electrically charged objects have an electric field surrounding them and exert electric forces on one another. Electrons can move easily in conductors, but not so easily in insulators.

To return to the chapter summary click Escape or close this document. Electric current is the flow of charges— usually either electrons or ions. Electric Current The energy carried by the current in a circuit increases as the voltage in the circuit increases. 2 2 Reviewing Main Ideas

To return to the chapter summary click Escape or close this document. Electric Current 2 2 Reviewing Main Ideas In a battery, chemical reactions provide the energy that causes electrons to flow in a circuit. As electrons flow in a circuit, some of their electrical energy is lost due to resistance in the circuit.

To return to the chapter summary click Escape or close this document. In an electric circuit, the voltage, current, and resistance are related by Ohm’s law. Electric Circuits The two basic kinds of electric circuits are parallel circuits and series circuits. 3 3 Reviewing Main Ideas The rate at which electric devices use electrical energy is the electric power used by the device.

To return to the chapter summary click Escape or close this document. Question 1 Chapter Review Three lightbulbs are wired in an electric circuit. When one lightbulb is removed from the circuit, the other two lightbulbs continue to glow. This circuit is an example of what type of circuit? A. damaged string of lights B. parallel circuit C. insulator D. series circuit PS 4.4e

To return to the chapter summary click Escape or close this document. Chapter Review Answer The circuit is an example of a parallel circuit. The lightbulb that was removed was wired in parallel with the other two lightbulbs. Removing that bulb did not break the flow of current into the other two lightbulbs because there was more than one path for current to follow.

To return to the chapter summary click Escape or close this document. Question 2 Chapter Review What is the purpose of a fuse or circuit breaker in a household electric circuit? Answer A fuse or a circuit breaker limits the amount of current that can flow in a circuit. This keeps the wires in the household circuit from becoming hot enough to cause a fire. PS 5.2b

To return to the chapter summary click Escape or close this document. Question 3 Chapter Review The rate at which electrical energy is converted into other forms of energy is known as _______. Answer The answer is electric power. This quantity can be calculated using P = IV. PS 4.4d

To return to the chapter summary click Escape or close this document. Question 4 Chapter Review The amount of electrical energy equal to using 1 kW of power continuously for 1 hr is called what? Answer The answer is one kilowatt-hour. This is written as 1 kWh. PS 4.4d

To return to the chapter summary click Escape or close this document. Question 5 Chapter Review A(n) _____ occurs when static charge moves quickly from one object to another. A. series circuit B. electric discharge C. induced charge D. electric resistance PS 4.4

To return to the chapter summary click Escape or close this document. Chapter Review Answer The answer is B. A spark is an example of an electric discharge.

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 1 The separation of positive and negative charges due to an electric field is called a(n) _______. A. transfer of charge B. induced charge C. electric discharge D. electric current PS 4.4f

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer ANSWER: B. The doorknob in the figure has an induced charge because the electric field around excess negative charges on the hand repel negative charges on the doorknob.

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 2 Substances in which electrons do NOT move easily, such as rubber and glass, are known as _________. A. conductors B. metals C. insulators D. lightning rods PS 4.4

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer The answer is C. The opposite of an insulator is a conductor.

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 3 What is being illustrated in this figure? A. electric current B. parallel circuit C. series circuit D. voltage PS 4.4e

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer The answer is C. In a series circuit there is only one path for electric current to follow.

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 4 An electric _____ surrounds an electric charge and exerts a force on other electric charges. A. current B. discharge C. resistance D. field PS 5.2b

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer The answer is D. The electric field around a charge exerts a force on other charges even if the charges are not touching.

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 5 The _______ of a battery is a measure of how much electrical potential energy each electron can gain. A. amperes B. resistance C. voltage D wattage PS 4.4

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer The answer is C. Voltage is measured in Volts (V).

To return to the chapter summary click Escape or close this document. To advance to the next item or next page click on any of the following keys: mouse, space bar, enter, down or forward arrow. Click on this icon to return to the table of contents Click on this icon to return to the previous slide Click on this icon to move to the next slide Click on this icon to open the resources file. Help Click on this icon to go to the end of the presentation.

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