# Shared Flashcard Set

## Details

Midterm Science Vocab
.
39
Science
01/10/2010

Term
 scientific method
Definition
 organized set of investigation procedures
Term
 experiment
Definition
 tests the effect of one thing on another using controlled conditions
Term
 variable
Definition
 a quantity that can have more than a single value
Term
 dependent variable
Definition
 value changes according to the changes in other variables
Term
 independent variable
Definition
 the variable you change to see how it will affect the dependent variable
Term
 constant
Definition
 a factor that does not change when other variables change
Term
 control
Definition
 the standard by which the test results can be compared
Term
 bias
Definition
 occurs when what the scientist expects changes how the results are viewed.
Term
 model
Definition
 represents an idea, event, or object to help people better understand it.
Term
 theory
Definition
 an explanation of things or events based on knowledge gained from many observations and investigations
Term
 scientific law
Definition
 a statement about what happens in nature and that seems to be true all the time.
Term
 technology
Definition
 the application of science to help people
Term
 standard
Definition
 an exact quantity that people agree to use to compare measurements.
Term
 si
Definition
 standards universally accepted and understood by scientists throughout the world
Term
 volume
Definition
 the amount of space occupied by an object
Term
 mass
Definition
 a measurement of the quantity of matter in an object.
Term
 density
Definition
 the mass per unit volume of a material
Term
 graph
Definition
 a visual display of information or data
Term
 distance
Definition
 how far an object has moved
Term
 displacement
Definition
 the distance and direction of an object's change in position from the the starting point.
Term
 speed
Definition
 the distance an object travels per unit of time.
Term
 average speed
Definition
 the total distance traveled divided by the total time of travel.
Term
 instantaneous speed
Definition
 the speed at any given moment of time
Term
 velocity
Definition
 included the speed of an object and the direction of its motion
Term
 hypothesis
Definition
 a possible explanation for a problem using what you know and what you observe
Term
 force
Definition
 a push or a pull
Term
 net force
Definition
 combination of two or more forces acting on an object at the same time
Term
 balanced forces
Definition
 forces on an object that are equal in size and opposite in direction
Term
 inertia
Definition
 the tendency of an object to resit any change in it's motion
Term
 newton's second law of motion
Definition
 states that the acceleration of an object is in the same direction as the net force on the object.
Term
 friction
Definition
 the force that opposes the sliding motion of two surfaces that are touching each other
Term
 static friction
Definition
 the frictional force that prevents two surfaces from sliding past each other
Term
 sliding friction
Definition
 the force that opposes the motion of two surfaces sliding past each other
Term
 air resistance
Definition
 opposes the motion of objects that move through the air.
Term
 gravity
Definition
 an attractive force between any two objects that depends on the masses of the objects and the distance between them.
Term
 weight
Definition
 the gravitational force exerted on an object
Term
 centripetal acceleration
Definition
 acceleration towards the center of a curved or circular path
Term
 centripetal force
Definition
 the net force exerted towards the center of a curved path
Term
 acceleration
Definition
 the rate of change of velocity
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