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| A method of learning and communicating information about the natural world |
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| Three Main Categories of Science |
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| A possible explanation for a problem using what you know and what you observe (an educated guess) |
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| Tests the effect of one thing on another using controlled conditions |
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| A quantity that can have more than one value |
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| A variable that changes according to the changes in other variables |
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| The variable you change to see how it affects the dependent variable |
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| A factor that does not change when other variables change |
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| The standard by which the test result can be compared (a person in a pain reliever experiment that receives no reliever) |
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| When a scientist changes an the experiment to prove his hypothesis right |
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| A model 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 gained from observations |
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| A statement in nature that has been proved to happen all the time |
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| The application of science to help people |
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| An exact quantity that people agree to compare measurements (metric and customary systems) |
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| Describes how far an object moves |
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| The distance and direction of an objects change in position from the starting point |
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| The distance and object travels per unit time (d/t) |
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| Speed that doesn't change |
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| The total distance traveled divided by the total time traveled |
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| The speed at a given point in time |
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| Speed and direction of an object |
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| The rate of change in velocity |
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| A push or a pull on an object |
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| the overall force of an object when two or more forces are acting on one object |
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| When two forces equal forces are pushing on the same object in opposite directions |
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| Two unequal forces pushing on an object in opposite directions |
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| The tendency of an object to resist any change in motion |
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| An object moving at constant velocity keeps moving at that velocity unless acted upon by an unbalanced force |
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| The amount of space occupied by an object |
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| The quantity of matter in an object |
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| The mass per unit volume of a material (m/v) |
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| The measurement of the average kinetic energy of all the particles in an object |
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| A visual display of information or data |
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| The acceleration of an object is in the same direction as the net force on the object |
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| The force that opposes the sliding motion of two surfaces that are touching each other |
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| The frictional force that PREVENTS two surfaces from sliding past each other |
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| The frictional force that OPPOSES the motion of two surfaces sliding past each other |
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| The frictional force between a rolling object and the surface it rolls on |
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| Opposes the motion of objects to fall with different accelerations and different speeds |
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| The highest speed a falling object will reach |
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| An attractive force between any two objects that depends on the masses of the objects and the distance between them |
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| Gravity, Electromagnetic, Strong Nuclear, Weak Nuclear |
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| The gravitational force exerted on an object |
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| For every action there is an equal and opposite reaction |
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| The product of mass and velocity |
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| The ability to perform work |
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| The energy a moving object has |
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| The energy stored by objects due to their position above earth's surface |
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| energy stored by something that can stretch or bend |
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| Chemical Potential Energy |
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| Energy stored in chemical bonds |
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| The total amount of potential and kinetic energy in a system |
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| Law of Conservation of Energy |
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| Energy cannot be created or destroyed only transferred |
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| The transfer of energy that occurs when a force makes an object move |
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| The rate at which work is done |
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| A device that makes doing work easier by increasing the force that can be applied to an object |
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| Force applied to something |
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| Force applied by something |
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| The ratio of the input force to the output force |
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| The measure of how much energy put into a machine is changed into useful work by the machine |
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| A machine that does work with one movement |
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| A bar that is free to pivot on a fixed point called a fulcrum |
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| A grooved wheel with a rope, chain, or cable running along the groove |
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| A simple machine consisting of a shaft attached to the center of a wheel |
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| A sloping surface that reduces the amount of work needed to do |
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| An inclined plane wrapped around a cylindrical post |
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| An inclined plane with one or two sloping sides (knife) |
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| Two or more simple machines that work together |
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