### 5th grade Science (Force and Motion)

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created 6 years ago by mgort
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updated 6 years ago by mgort

1

air resistance

is the friction between an object and particles in the air.

2

average speed

is determined by dividing the trip distance by the total time of the trip.

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balanced forces

exist when all the forces acting on an object result in the object staying at rest or moving at a constant speed in the same direction.

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contact force

is a push or a pull that touches or comes in contact with an object to change motion.

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direction

is the path along which something moves, lies, or points. Some direction terms are: right, left, north, south, up, down, etc.

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distance

is a measurement of how far from each other two points or places are.

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effort force

is the force exerted by the user on the simple machine.

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electromagnet

is produced when electricity flows through a wire. Coiling a wire around an iron bar increases the strength of the magnetic field.

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force

is a push or a pull on something.

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is the force exerted by the simple machine on the load. All simple machines involve a force on the load and an effort force.

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friction

is a force that acts on an object when it rubs against another object or material.

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fulcrum

is the fixed point on which the lever moves.

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graph

is a representation of data plotted on an x-axis and y-axis.

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gravity

is a force where one object pulls on another object.

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inclined plane

is a simple machine made with a flat slanted surface.

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instantaneous speed

is how fast an object moves at a certain point in time.

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lever

is a bar that tilts around a fixed point to produce a useful motion.

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is the object to be moved by the simple machine.

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mass

is the measure of the amount of matter in an object.

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motion

is the changing of position of an object.

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newton

is a metric unit used to measure the force applied to objects.

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non-contact force

is a push or a pull that does not touch an object to change motion.

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point of reference

is a background or non-moving object in the background used in describing the motion of another object.

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pulley

is a simple machine that is made up of a wheel with a groove in it.

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screw

is a simple machine that is an inclined plane wrapper around a rod or core.

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simple machine

is a device that makes a job easier to do by changing the amount of force, the direction of a force, or the distance through which a force moves.

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speed

is the measurement of how fast an object travels from one point to another.

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spring scale

is used to measure the approximate weight, or the pull of gravity, on an object.

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time

is the measurement of the period between events or how long it takes an object to move from one place to another.

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unbalanced forces

exist when all the forces acting on an object result in a change of motion of the object. If it was at rest, it begins to move. If it is moving, it changes speed or changes direction.

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variables

are the properties of things that can change, be changed, or vary in an investigation. Some examples are time, distance, and temperature.

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wedge

is a simple machine that helps cut or split objects.

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weight

is the measure of the amount of gravity pulling on an object.

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wheel and axle

is a simple machine that has a center rod that is attached to a wheel.