ELECTRICITY REVIEW
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| voltmeter | measures the electric potential between two points in a ciruit
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| wall outlet | Brings electrical energy in from the community power supply
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| switch | Can be opened to stop current flow or closed to allow current to flow
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| resistor | A device that slows down the flow of electrons in conductors
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| motor | Converts electrical energy into motion
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| light bulb | Converts electrical energy into light and heat
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| ground | Connects the circuit to the earth
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| fuse | Prevents too much current from flowing through the circuit
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| cell | Source of current. Long bar represents the positive terminal.
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| battery | One,two or more cells joined together. This _______ is made up of 3 cells.
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| ammeter | Measures the amount of electric current flowing in a circuit.
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| Like charges | Charges that will repel
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| Unlike charge | Charges that will attract
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| Static electricity | The buildup of charges on an object which do not flow
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| Friction | The transfer of electrons from one object to another by rubbing
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| Conduction | The tranfer of electrons from one object to another by direct contact
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| Law of conservation of charge | Electrons are not created or destroyed they are only transferred from one location to another
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| Static cling | Static electricity that causes clothes to stick together and is what enables plastic wrap to cling
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| Static discharge | The loss of static electricity as electric charges move off an object
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| Lightning | a discharge of static electricity between clouds and the earth
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| Pith Ball | A ball on a string used to detect static charge
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| Potential difference | The difference in electrical potential between two places which pushes charge through a circuit
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| Voltage | Another name for the potential difference, measured by a voltmeter
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| Volt | The unit of measure for the potential difference
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| Batteries and generators | Voltage sources
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| Resistance | The opposition to the movement of electric charges flowing through a material
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| Ammeter | An instrument used to measure current
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| Amps | The unit used to measure current
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| Ohm's Law | This Law states that resistance is equal to the voltage divided by the current
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| Series circuit | An electric circuit with a single path
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| Parallel circuit | An electric circuit with multiple paths
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| Short circuit | An unintended path that allows current to follow a low resistance causing large current.
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| Conductor | A material through which electrons move freely, forming an electric current
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| Electric circuit | A complete path through which electric charges can flow
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| Electric current | The flow of electric charges through a material
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| Grounded | Allowing charges to flow directly from the circuit to the ground connection
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| Insulator | A material through which the charges of an electric current are not able to move
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| Third prong of an appliance plug | Part of a plug which connects the metal shell of an appliance to the safety grounding wire of a building
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| Van de Graaff generator | a device which produces static electricity using a rubberband like belt
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| Lightning rod | A metal rod mounted on the roof of a building in order to protect a building
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| circuit breaker | A reusable device added to a circuit to prevent overheating
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| Ohm | The unit of measure for resistance
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| electricity | form of energy which can travel along conductors
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| charged particles | particles that carry electricity
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| matter | either solid, liquid or gas, that which has mass and occupies space
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| atoms | extremely small particles which all matter is made up of
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| electrons | negatively charged particles which orbit the nucleus of an atom
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| neutrons | neutrally charged particles which are contained in the nucleus of the atom
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| protons | positively charged particles which are contained in the nucleus of the atom
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| nucleus | central core of an atom containing protons and neutrons
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| conductors | objects that electricity is allowed to pass through
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| insulators | objects that do not allow electrons to travel through
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| negatively charged | objects that have gained electrons making them... _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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| positively charged | objects that have lost electrons making them _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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| circuit | complete conducting loop where all components are linked together
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| free electrons | electrons which are able to to transfer through a substance
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| circuit diagram | simple way of drawing electrical circuits
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| terminal | point of attachment for wires to a battery or meter
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| current | the flow of electrons around a conducting circuit
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| power source | an item such as a battery, electric supply or the wall socket
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| components | objects which are part of an electrical circuit, lamp, battery, resistor etc
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| load | object which converts electrical energy into other forms
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| alternating current | current that keeps changing direction
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| direct current | current which travels in one direction only
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| volt | unit of voltage gain or loss
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| ammeter | meter used to measure the size of a current
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| voltmeter | meter used to measure the gain or loss of voltage
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| fuse | a thin wire which melts if the current is too large, not reusable
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| resistance | property which makes it hard for electrons to pass
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| resistor | a component used to limit the current in a branch/part of a circuit
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| voltage | the amount of push on the charge in a circuit (or energy per unit charge)
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| power | total amount of energy supplied or used per second
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| watt | unit of power
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| What happens when you heat a substance? | The particles receive more energy and are able to move faster
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| We use energy in many ways. Cooking food, lighting homes, etc. Energy always changes from one form to another and some always changes into ________ energy. | heat energy
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| Give an example of wasted energy. | When turning on a lamp, it produces light and heat. The heat energy is wasted energy.
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| Many substances are burned to release their chemical energy to provide heat and light. They are called fuels. Name at least 3. | wood, coal, gas, charcoal, oil, diesel oil, petrol, natural gas, and wax
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| Give two examples of things that contain chemical stored energy. | food & fuels
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| Name three alternative sources of electric energy to fossil fuels. | geothermal energy, wind power, solar power, hydroelectricity
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| Nonrenewable Energy Source | energy source that cannot be restored for human use, such as fossil fuels
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| Renewable Energy Source | energy source that is being replenished, even as it is being consumed- solar energy, geothermal energy, wind energy, and hydropower are examples
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| Geothermal Energy | energy derived from heat under the Earth's surface
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| Hydropower | energy from falling or moving water
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
douglal
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