1) happens when positive & negative charges no longer balance a) static electricity b) resistance c) magnetism d) Where is the magnetic field the strongest? 2) electric charge in motion a) Explain the relationship between the speed that a wire/magnet is moved & the strength of the electrical current. b) electric current c) What is better a series circuit or a parallel circuit? d) What happens to its magnetic poles when you break a magnet into two pieces? 3) material does not allow electric charges to flow through it easily a) Where is the magnetic field the strongest? b) What does the shape of the magnetic field depend on? c) resistance d) Explain the relationship between the speed that a wire/magnet is moved & the strength of the electrical current. 4) electric charge can flow only in one path a) series circuit b) What are the 4 R’s of electrical safety? c) magnetism d) parallel circuit 5) has 2 or more paths for the electric charge to follow a) What is the difference between a series circuit and a parallel circuit? b) What is a magnet? c) How can you make an electromagnet stronger? d) parallel circuit 6) force that acts on moving electric charge & magnetic materials that are near a magnet a) Describe what happens with two objects that have opposite charges versus those that have the same charge. b) magnetism c) Explain the relationship between the speed that a wire/magnet is moved & the strength of the electrical current. d) What are some gadgets that have electromagnets in them? 7) an invisible field that goes out in all directions a) Describe what happens with magnets that have opposite poles versus those that have like poles. b) Describe an electric field—what is it, and where is it the strongest? c) magnetic field d) Why is Earth considered an electromagnet? 8) coil of wire with many loops through which an electric current passes a) electromagnet b) resistance c) How can you make an electromagnet stronger? d) Describe an electric field—what is it, and where is it the strongest? 9) Static electricity happens when positive & negative charges no longer balance. Some examples include: lightning; dashing across the carpet & touching a metal doorknob a) What causes static electricity? b) Describe an electric field—what is it, and where is it the strongest? c) Where is the magnetic field the strongest? d) What does the shape of the magnetic field depend on? 10) Two objects that have opposite charges will pull toward each other. Objects that have the same charge will push away, or repel. a) Explain the relationship between the speed that a wire/magnet is moved & the strength of the electrical current. b) Describe what happens with two objects that have opposite charges versus those that have the same charge. c) magnetism d) What is the difference between an open circuit and a closed circuit? 11) An electric field is the space around an electrically charged object. It is the strongest close to the charged object. a) Provide at least 2 examples of conductors and 2 examples of insulators. b) What is a generator, and how is it powered? c) Describe an electric field—what is it, and where is it the strongest? d) What is the difference between a series circuit and a parallel circuit? 12) copper & silver. Two examples of insulators are: plastic & rubber. a) Provide at least 2 examples of conductors and 2 examples of insulators. b) magnetic field c) series circuit d) electric current 13) An open circuit has at least one break that interrupts the flow of electric charges. A closed circuit does not have any breaks. a) series circuit b) What is the difference between an open circuit and a closed circuit? c) What is a generator, and how is it powered? d) What is a magnet? 14) A series circuit is a simple circuit where electric charge can flow only in one path. A parallel circuit has two or more paths for the electric charge to follow. a) What is the difference between a series circuit and a parallel circuit? b) parallel circuit c) electromagnet d) Describe what happens with magnets that have opposite poles versus those that have like poles. 15) I think that a parallel circuit is better because: (1) a break in one part of the circuit does not stop the charge from flowing, and (2) it can handle electrical devices that require different amounts of current. a) What is better a series circuit or a parallel circuit? b) Where is the magnetic field the strongest? c) What are some gadgets that have electromagnets in them? d) Describe what happens with two objects that have opposite charges versus those that have the same charge. 16) A magnet is anything that attracts other things made of iron, steel, and certain other metals. a) Describe what happens with magnets that have opposite poles versus those that have like poles. b) What is a generator, and how is it powered? c) What is a magnet? d) magnetic field 17) at the magnet’s ends or poles a) What is the difference between an open circuit and a closed circuit? b) Where is the magnetic field the strongest? c) static electricity d) Describe an electric field—what is it, and where is it the strongest? 18) The shape of the magnetic field depends on the shape of the magnet. a) What does the shape of the magnetic field depend on? b) Provide at least 2 examples of conductors and 2 examples of insulators. c) Explain the relationship between the speed that a wire/magnet is moved & the strength of the electrical current. d) How can you make an electromagnet stronger? 19) Opposite poles (north seeking & south seeking) attract each other. Like poles (both north seeking or both south seeking) repel. a) What is a generator, and how is it powered? b) Explain the relationship between the speed that a wire/magnet is moved & the strength of the electrical current. c) What happens to its magnetic poles when you break a magnet into two pieces? d) Describe what happens with magnets that have opposite poles versus those that have like poles. 20) If you break a magnet into two pieces, you will have two magnets, each with its own north-seeking pole & south- seeking pole. a) What happens to its magnetic poles when you break a magnet into two pieces? b) magnetic field c) resistance d) parallel circuit 21) Earth is considered an electromagnet because scientists believe that Earth’s outer core is made of iron. As the Earth rotates, electric currents create a magnetic field. The magnetic field is the strongest at the poles. a) Explain the relationship between the speed that a wire/magnet is moved & the strength of the electrical current. b) What is a generator, and how is it powered? c) Why is Earth considered an electromagnet? d) How can you make an electromagnet stronger? 22) More coils, A larger core, More current passing through the wire a) Where is the magnetic field the strongest? b) What is the difference between a series circuit and a parallel circuit? c) How can you make an electromagnet stronger? d) Why is Earth considered an electromagnet? 23) Some gadgets that have electromagnets in them are: TVs, fans, VCRs, computers, DVD players, doorbells, motors, and earphones. a) resistance b) electric current c) What causes static electricity? d) What are some gadgets that have electromagnets in them? 24) The faster the coiled wire or magnet is moved, the stronger the electric current it produces. The slower the movement, the weaker the current. a) Explain the relationship between the speed that a wire/magnet is moved & the strength of the electrical current. b) What are some gadgets that have electromagnets in them? c) What is a generator, and how is it powered? d) series circuit 25) A generator is a machine that creates electrical energy by turning coils of wire around powerful magnets. Some ways that a generator can be powered include: wind, falling water, and steam. a) What causes static electricity? b) magnetism c) What is a generator, and how is it powered? d) resistance 26) Respect the power of electricity, Read & follow the instructions that come with every product, Replace worn or cracked electrical cords, Relocate, or move, cords so that people don’t walk on them a) series circuit b) What are the 4 R’s of electrical safety? c) What does the shape of the magnetic field depend on? d) electromagnet

Chapter 13 Science

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