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| the pattern of investigation procedures |
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| a possible explanation for a problem using what you know and what you observe |
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| something that tests the affects of one thing on another using a control |
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| a quantity that can have more than a single value |
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| something that's value changes according to the changes in the other variables |
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| a variable that changes to see how it will affect the dependent variable |
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| a factor that does not change |
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| the standard by which the test results can be compared |
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| when a scientists expectations changes how the results are analyzed or conclusions are made |
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| represents an idea, event, or object to help people better understand it |
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| an explanation of things or events based on knowledge from many observations and investigations |
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| a statement about what happens in nature and that seems to be true all the time |
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| an exact quantity that people agree to use to compare measurements |
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| international system of units (metric system) |
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| the amount of space occupied by an object |
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| anything that takes up space and has mass |
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| the measurement of the quantity of matter in an object |
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| the mass per unit volume of a material |
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| a visual display of information or data |
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| the application of scientific knowledge to benefit people |
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| a group of people that share similar values and beliefs |
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| a change in an objects position relative to a reference point |
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| the distance and direction of the objects change in position |
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| distance an object travels per unit of time |
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| has magnitude and direction |
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| the straight line distance between your starting point and your ending point |
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| includes the speed of an object and the direction of its motion |
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| the product of an objects mass and velocity |
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| the rate of change of velocity |
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| acceleration toward the center of a curved or circular path |
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| the sum of all forces acting on an object |
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| the force that opposes the sliding motion of two surfaces that are touching each other |
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| an attractive force between two objects and the distance between them |
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| a region in space that has a physical quantity (such as force) at every point |
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| the gravitational force exerted on an object |
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Term
| Newtons first law of motion |
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Definition
| states that an object moves at a constant velocity unless an unbalanced force acts on it |
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| the tendency of an object to resist any change in its motion |
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| Newtons second law of motion |
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Definition
| states that an objects acceleration is in the same direction as the net force on the object and is equal to the net force exerted on it divided by its mass |
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| Newtons third law of motion |
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Definition
| states that when one object exerts a force on a second object, the second object exerts a force that is equal in strength and opposite in direction |
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| a friction-like force that opposes the motion of objects that move through the air |
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| the maximum speed an object will reach when falling through a substance such as air |
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| describes the fall of an object on which only the force of gravity is acting |
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| is a force exerted toward the center of a curved path |
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| law of conservation of momentum |
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Definition
| states that if no external forces act on a group of objects their total momentum does not change |
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| the force applied through a distance |
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| a device that changes the force or increases the motion from work |
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| a machine that does work with only one movement of the machine |
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| a combination of two or more simple machines |
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| the ratio of output work to input work |
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| the ratio of the output force to the input force |
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| the ability to cause change |
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| anything in which you can imagine a boundray |
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| energy that is stored due to the interactions between objects |
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| energy that is stored by compressing or stretching an object |
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| chemical potential energy |
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Definition
| energy that is due to chemical bonds |
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| gravitational potential energy |
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Definition
| energy that is due to the gravitational forces between objects |
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| law of conservation of energy |
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Definition
| states that energy can not be created or destroyed |
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| the sum of kinetic energy and potential energy of the objects in a system |
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| the rate at which energy is converted |
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| the measure of the average kinetic energy of the particles that make up an object |
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| the sum of the kinetic energy and potential energy of all of the particles that make up that object |
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| energy that is transferred between objects due to a temperature difference between those objects |
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| the amount of heat needed to raise the temperature of a 1 kg of that material by 1 C |
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| the transfer of thermal energy by collisions between the particles that make up matter |
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| the transfer of thermal energy in a fluid by the movements of the warmer and cooler fluid |
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| the transfer of energy by electromagnetic waves, such as light and microwaves |
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| a material through which thermal energy moves slowly |
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| a device that transforms radiant energy from the Sun into thermal energy |
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| the study of the relationships between thermal energy, heat, and work |
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| first law of thermodynamics |
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Definition
| states that if the mechanical energy of a system is a constant, the increase in thermal energy of that system equals the sum of thermal energy transfers into that system and the work done on that system |
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| second law of thermodynamics |
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Definition
| states that energy spontaneously spreads from regions of higher concentration to regions of lower concentration |
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Definition
| a device that converts some thermal energy into mechanical energy |
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| internal combustion engine |
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Definition
| a heat engine that burns fuel inside a set of cylinders |
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Term
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Definition
| the accumulation of excess electric charge on an object |
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Term
| law of conservation of charge |
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Definition
| states that charge can be transferred from object to object, but it cannot be created or destroyed |
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Term
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Definition
| surrounds every electric charge and exerts a forcde that causes other electric charges to be attracted or repelled |
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Definition
| a material through which electrons move easily |
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| a material in which electrons are not able to move easily |
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Definition
| the process of transferring charge by touching or rubbing |
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| the rearrangement of electrons on a neutral object caused by a nearby charged object |
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| a devoce that can detect electric charge |
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| the net movement of electric charges in a single direction |
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| related to the force that causes electric charges to flow |
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| a closed path that electric current flows |
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Definition
| a material's opposition to the flow of electric current and to convert electrical energy into other forms of energy; measured in ohms |
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Definition
the current in a circut = the voltage differance divided by resistance
I=V/R |
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Term
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Definition
| an electrical circut with only one branch |
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Definition
| contain two or more branches for current |
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Definition
the rate at which electrical energy is converted to another form of energy
P=IV |
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