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Sem B Unit 7
Physical Science 9
| Term | Definition |
|---|---|
| alternating current (AC) | electrical current or charges that flow in alternating directions back and forth |
| amperage | measure of the size of an electric current |
| analyzing | looking at data to try to find patterns |
| atom | basic unit of matter and the defining structure of all elements |
| battery | a common DC power source |
| circuit | a closed path for transmitting electricity |
| circuit diagram | symbolic representation of an electrical circuit and everything connected to it. |
| conductor | a material that allows electric current to flow through it easily |
| constants | variable in the experiment that does not change |
| coulomb | a unit used to measure electric charge which is represented by the SI unit C |
| Coulomb’s Law | law that states that the force related to two charges is proportional to the product of the charges and inversely proportional to the square of the distance between the charges. |
| current electricity | an electrical charge traveling through a conductor |
| dependent variable | variable affected by the change |
| direct current (DC) | electrical current which flows consistently in one direction |
| drawing conclusions | deciding what the patterns in data says about a relationship between the data |
| electric charge | property of an object or particle that causes it to experience a force when it is in an electric or magnetic field |
| electric circuit | path or line through which electricity flows |
| electric current | movement of electrons through a wire |
| electric field | an area around a charged object that exerts a force without direct contact |
| electric force | force between two electrically charged objects that are close to each other |
| electrical circuit | a path or line through which electrical energy flows. |
| electrical energy | energy of moving electrons |
| electricity | form of electrical energy that flows through wires to power electrical devices |
| electromagnet | device consisting of an iron or steel core inside a wire coil; when electric current runs through the wire, the core becomes magnetized |
| electron | negatively charged subatomic particle surrounding the atom’s nucleus |
| energy | the ability to do work |
| evaluate | to determine the significance, worth, or condition of usually by careful appraisal and study |
| experimental design | all the parts of the experimental setup |
| Faraday’s Law of electromagnetic induction | movement of magnets around a coil of wire to create an electric charge though a wire |
| fuse | an electrical safety device used to protect a circuit from surges in electricity |
| hypothesis | specific, testable prediction] or a specific, testable prediction |
| incandescent light bulb | converts electrical energy to light and heat |
| independent variable | variable that is changed |
| insulator | a material that resists the flow of electric current through |
| interpreting | explaining the meaning of data |
| inverse proportionality | relationship between two objects where one object’s value decreases as the other object’s value increases |
| iron filings | small particles of iron |
| joule | unit of energy used to measure energy and work which is represented by the SI unit J |
| kinetic energy | energy of motion |
| Kirchhoff’s law | states that the sum of currents into a circuit junction equals the sum of currents out of that junction |
| Law of Conservation of Energy | law that states that energy cannot be created or destroyed, but only changed from one form into another |
| load | device in an electric circuit that converts electrical energy into other forms of energy |
| maglev | transportation system in which vehicles are lifted and propelled by magnetic force |
| magnet | an object that can attract other objects because of magnetism |
| magnetic field | an area around a magnetic object that exerts a force without direct contact |
| magnetic flux | number of magnetic field lines passing through a surface |
| magnetic force | attractive or repellent force produced by the movement of charged objects |
| magnetism | the force that magnetic objects exert when they attract or repel each other |
| Ohm’s law | states that voltage = current • resistance |
| parallel circuit | a circuit in which there multiple paths from the negative terminal of a battery to the positive terminal |
| potential energy | energy stored by an object because of its position relative to another object |
| proportionality | relationship between two objects where they increase or decrease at the same rate |
| resistance | force that moves in opposition to the flow of electricity |
| resistor | opposes the flow of electric current in a circuit |
| series circuit | a circuit in which there is only one path from the negative terminal of a battery to the positive terminal |
| static electricity | a stationary electrical charge |
| switch | device used to easily start and stop the flow of electrical current |
| testable question | type of question that you can only find the answer by conducting an experiment |
| volt | a unit used to measure voltage which is represented by the SI unit V |
| voltage | measure of the strength of an electric current |
| work | force acting upon an object, causing a displacement |
Created by:
Kaplocher
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