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Science 3-4
| Question | Answer |
|---|---|
| energy | ability to apply force over a distance |
| kinetic energy | energy that is in motion |
| potential energy | stored energy |
| newton | standard unit of measuring force |
| spring scale | instrument used to measure force |
| speed | rate at which something is able to move |
| transfer of energy | movement of energy from one location or object to another |
| pull | act of taking hold of something and exerting force to bring toward |
| push | move forward by using force to pass and cause others to move aside |
| reaction | resistance or force of equal magnitude acting in opposite directions |
| unbalanced forces | forces on an object that cause change in motion |
| balanced forces | adjust strengths of forces so that they will not cause a change in movement of an object |
| friction | force that opposed the motion of one surface across another |
| collide/collision | to strike or hit something with any amount of force |
| motion | the change in an objects position |
| force | a push or a pull that can change the motion of an object |
| inertia | tendency of an object to remain still or continue moving until a force acts upon it |
| Newton's 1st law | an object stays at rest or stays in motion until unbalanced forces act upon it |
| Newton's 2nd law | acceleration of an object depends on the mass of object and magnitude of force acting apon it |
| Newton's 3rd law | for every action there is an equal and opposite reaction |
| distance | measure of how far apart two objects are |
| magnetic attraction | magnetic force exerted by oppositely charged particles |
| gravitational force | force of attraction between two masses |
| net force | sum of all the forces acting upon an object |
| mechanical energy | energy caused by a motor |
| thermal energy | energy caused by heat |
| chemical energy | energy caused by a chemical reaction |
| controlled variable | does not change an experiment |
| dependent variable | the data in an experiment |
| independent variable | what changes in the experiment |
| attract | to pull toward each other |
| compass | instrument using a free-rotating magnetic needle to show direction |
| induced magnetism | influence of a magnetic field on iron (temporary magnet) |
| magnet | object that respomds to magnetic force |
| magnetic field | area of magnetic influence around a magnet |
| magnetism | property of certain materials that causes them to attract iron or steel |
| permanent magnet | object that sticks to iron |
| pole | the end of a magnet |
| repel | to push away from each other |
| temporary magnet | iron that behaves like a magnet only under the influence of external magnetic field |
| battery | source of stored chemical energy |
| circuit | pathway for the flow of energy |
| component | one item in a circuit |
| constraint | restriction or limitation |
| contact point | place on a component where connections are made to allow electricity to flow |
| core | in an electromagnet, the material that the coil of insulated wire is wound around |
| criterion | standard for testing something |
| electric current | flow of electricity through a conductor |
| electromagnet | piece of iron that becomes a temporary magnet when electricity flows through the wrapped wire coils |
| electromagnetic force | force of nature that acts between charged particles and creates electric and magnetic fields |
| electromagnetism | interaction of electric and magnetic fields |
| engineer | person who design, builds, or maintains engines, machines, or public works |
| filament | material in a lightbulb that makes light when heated |
| insulator | material that prevents the flow of electricity |
| conductor | material that transmits the flow of energy |
| drag | friction that acts to slow down an object that moves through liquid or gas |
| lift | upward force of an object that opposed the downward pull of gravity |
| thrust | forward force produced by airplane engines |
| weight | force of attraction that pulls objects towards earth |
| friction | force that opposes the motion of one surface across another |
| aviation | study of the science of flight |
| Bernouli Principle | as the speed of a moving fluid (air or liquid) increases, the pressure decreases |
| air pressure | measure of the force with which air molecules push on a surface |
| buoyancy | ability to float when placed in a fluid (air or liquid) |
| aerodynamics | study of how air flows around an airplane |
| altitude | height of an object above sea level |
| propeller | curved blade that forces an aircraft forward |
| pilot | person who operates an aircraft |
| ascent | rising through the air |
| descent | action of moving down |
Created by:
Lightbright555