earth science
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| static electricity | the imbalance of positive or negative charges between objects
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| electrical force | the push or pull between objects that have a different charge
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| electrical field | the space around electrically charge objects
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| what causes static electricity on an object? | when a positive and negative charge no longer balance
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| what effect will an object have on a object with the opposite charge | they attract each other
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| what is the difference between an insulator and a conductor? | materials made up of atoms that do not become charged easily are insulators ex.plastic rubber,glass and dry wood materials made up of atoms that charge easily are good conductors ex. silver and copper
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| electric current | the flow of an electric charge through a material
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| insulator | materials made of atoms that DO NOT become charged easily e.g.- plastic ,rubber,glass
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| conductor | materials made up of atoms that become easily e.g.- copper silver,metals
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| what causes static electricity on an object? | when positive and negative charges no longer balance
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| what effect will a charged object have on a object with the oppositive charge? | objects that have opposite charges are attracted to each other
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| resistance | a quality of an object which means that electric current cannot flow easily through it
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| series circuit | a simple circuit path in which an electric current flows only one way in each part of the circuit
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| parallel circuit | 2 or more paths in which an electric charge can flow
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| magnetism | the property of attraction of an object that has a magnetic field. It can attract other objects made of metal
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| lodestone | a magnetic mineral
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| magnetic field | the invisible force that loops between the poles of a magnet due to the charges. The force is strongest at the poles or ends and get weaker as the distance from the magnetic increases
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| electromagnet | a coil of wire that causes a magnetic field when current moves through the wire
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| generator | a machine that creates electricity by turning coils of wire around powerful magnets
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| Why are homes wired in a parallel circuit? | if there is a break in the circuit the electric current will not stop. It will handle devices that need different amounts of current
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| name two types of circuits | series and parallel
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| What is the main difference between a series circuit and a parallel circuit | in a series circuit all devices share the current evenly. A parallel circuit can handle devices that require different amount of current.
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| If you break a magnet into 2 pieces what happens? | Once a magnet is broken into two pieces each piece will now have a north-seeking and south-seeking pole
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| What are some ways the earth is like a magnet? | like all magnets - its magnetic fields are strongest near the poles.
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| Why does the compass needle point in a north south direction? | the magnetic field of the earth attracts the needle to magnetic north.
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| what advantage does an electormagnet have over a natural magnet? | you can make an electromagnet stronger by increasing the number of coils
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| How is magnetism turned into electricity | sliding coiled wired over a magnet produces electricity or spinning a coiled wire
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| how do generators produce electricity | a generator spins a coiled wire around a magnet
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| how is an electro magnet different from a magnet? | the strength of an electro magnet remains constant . the electromagnet can be made more powerfull and it can be turned off.
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| In a(n) __________, electrical current flows in one path only. a. parallel b. series circuit c. open circuit d. closed circuit | b. series circuit
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