Term
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Definition
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Term
| What is the motion of charges called? |
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Definition
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Term
| What are the possible charges on charges particles? |
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Definition
| Charged particles can be either positive or negative. |
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Term
| If two positive charges or two negitive charges come together, what happens? |
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Definition
| They repel one another because they have to same charges. |
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Term
| If a negative charge and a positive charge come together, what happens? |
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Definition
| The charges attract because they are different. |
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Term
| An electric force can be either _____ or _________ |
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Definition
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Term
| What particle in the atom has a positive charge? |
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Definition
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Term
| What particle in the atom has a negative charge? |
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Definition
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Term
| What particle in the atom has a neutral charge? |
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Definition
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Term
| What is know about electrons? |
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Definition
| Electron are all the same. They all are found in the electron cloud, and have a negative charge. They are smaller then protons and attractive to protons. They repel each other. |
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Term
| What is important about a neutral atom? |
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Definition
| It has the same number of protons and electrons. |
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Term
| Why does a neutral atom have no net charge? |
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Definition
| The amount of protons and neutrons are the same. |
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Term
| If the number of electrons in an atom changes, what happens to the charge? |
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Definition
| The atom's charge changes to either negative or positive. |
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Term
| When is an atom positively charged? |
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Definition
| When it has more protons than electrons. |
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Term
| When is an atom negatively charged? |
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Definition
| When it has more electrons then protons? |
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Term
| When does an atom become electrically charged? |
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Definition
| When there is am imbalance of protons and electrons. |
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Term
| Which electrons are lost most easily? |
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Definition
| The valance (outer) electrons. |
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Term
| Are protons ever transferred? |
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Definition
| No, only electrons move around. |
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Term
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Definition
| A charged atom with a positive or negative charge. |
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Term
| Which holds electron better; a rubber comb or fur? |
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Definition
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Term
| Which holds electrons better; glass or silk? |
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Definition
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Term
| What is the principal of conservation of charge? |
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Definition
| Electrons can't be created or destroyed, but they are transferable from one object to another. |
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Term
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Definition
| A material where electrons can move around freely. |
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Term
| Why are metals good conductors? |
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Definition
| Metals are good conductors because the electrons are free to move around in the metal. |
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Term
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Definition
| An insulator is a material that doesn't conduct electricity because the electrons are tightly held by the nucleus. |
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Term
| What makes rubber and glass such good insulators? |
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Definition
| The electrons are tightly held by the nucleus. |
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Term
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Definition
| A semiconductor is a material that can sometimes conduct and sometimes insulate. |
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Term
| What is an example of a semiconductor? |
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Definition
| Water is a semiconductor. In liquid form, it conducts. In solid form, it insulates. |
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Term
| What is a superconductor? |
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Definition
| A superconductor is a material in which electrons can flow indefinitely because there is no resistance. |
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Term
| How does an object become charged? |
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Definition
| An object becomes charged through the passing or transfer of electrons. |
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Term
| What are the two methods of charging? |
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Definition
| The two methods of charging are charging by induction and charging by contact. |
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Term
| How does an object become charged? |
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Definition
| An object becomes charged through the passing or transfer of electrons. |
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Term
| What are the two methods of charging? |
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Definition
| Charging by induction and charging by contact. |
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Term
| What is charging by contact? |
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Definition
| Charging by contact is when a charged object comes into contact with a neutral object and some charge is transferred. |
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Term
| If the charged object is a conductor, what does the charge do? |
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Definition
| A charge will spread to all parts of the surface. |
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Term
| What is charging by induction? |
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Definition
| Charging by induction is when electrons are transferred by touch. |
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Term
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Definition
| Grounding is when charges move freely along a CONNECTION between a conductor and the ground. |
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Term
| Charging by induction occurs commonly during what kind of weather? |
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Definition
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Term
| During a thunderstorm, the bottom of clouds becomes ____________ charged, and the ground becomes ___________ charged. |
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Definition
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Term
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Definition
| Lighting is when the negatively charged cloud particles find a path to the ground and it makes a visible reaction. |
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Term
| What is the purpose if a lighting rod? |
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Definition
| A lighting rod prevents lighting. |
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Term
| What famous person experimented with electricity? |
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Definition
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Term
| Why wasn't Ben Franklin electrocuted? |
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Definition
| He tied the experiment to a fence and stayed inside his house. |
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Term
| What is meant when a molecule becomes electrically polarized? |
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Definition
| If one side of the atom or molecule is induced to be slight more positive or negative than the other. |
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Term
| Why are water molecules called electric dipoles? |
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Definition
| Water molecules are called electric dipoles because they are naturally electrically polarized. |
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Term
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Definition
| To find the force between two objects, you multiply the constant by the force on object 1 and the force on object two, divided by how far apart the objects are, squared. |
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Term
| What is the unit of charge called? |
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Definition
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Term
| How many electrons are in a Coulomb? |
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Definition
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Term
| When is the electrical force between charges the strongest? |
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Definition
| When the charges are large and the distance is small. |
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Term
| On what does the electrical force between charges depend? |
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Definition
| It depends on the charges of the objects and the distance. |
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Term
| If the charge of an object is doubled, what happens to the force? |
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Definition
| The force is also doubled. |
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Term
| If the distance between two charges is doubled, what happens to the force? |
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Definition
| The force is cut in fourths. |
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Term
| If the charge of one object if 1/3 of what it was, what happens to the force? |
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Definition
| The force will be one third of what it was. |
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Term
| If the distance between two charges is cut in half, what happens to the force? |
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Definition
| The force will have four times the force. |
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Term
| If the charge on one object is doubled, and the charge on the other object is tripled, what happens to the force? |
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Definition
| The force would be six times what it was. |
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Term
| If the force on one object is doubled and the distance between the objects is doubled, what happens to the force? |
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Definition
| The force is cut in half. |
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