Glossary

 **__Acceleration__** - the rate at which the velocity of an object changes over time.

**__ Aerodynamic __** - able to move through the air with as little air resistance as possible.

**__ Air resistance __** - the force of friction on a vehicle as it moves through the air.

**__ Axle __** - a bar or shaft that goes through the center of a wheel upon which the wheel turns.


 * __ Balanced force __** - when all foeces acting on an object are in balance; object does not move.


 * __ Blueprint __** - a detailed plan or drawing that shows how something is designed.


 * __ Cost effective __** - able to produce the best results for the least money.


 * __ Data __** - information, such as that gathered during an experiment.


 * __ Drag __** - force that opposes the forward movement of a vehicle.


 * __ Energy __** - the ability to do work or to move something.


 * __ Force __** - a push or pull that can make something move or change the way it moves.


 * __ Friction __** - force that resists movement between two objects that are touching.


 * __ Gravity __** - a force of attraction between any two masses.


 * __ Inclined plane __** - simple machine; a flat, slanted surface that helps move an object up or down.


 * __ Inertia __** - teh tendency of an object to resist any change in motion.


 * __ Kinetic energy __** - energy of motion.


 * __ Load __** - something that is lifted, carried, or supported.


 * __ Lever __** - simple machine; a bar that lifts or moves something at one end when the other end is pushed.


 * __ Machine __** - a device that changes the direction or amount of force needed to do work.


 * __ Mass __** - the amount of matter in an object.


 * __ Motion __** - the act of moving; to go from one place or position to another.


 * __ Newton's 1st Law of Motion __** - an object at rest remains at rest or an object in motion remains in motion until a force acts upon it (inertia).


 * __ Newton's 2nd Law of Motion __** - when a force is exerted on an object, the force acts to increase the speed of that object, to change its direction, or to slow or stop its motion.


 * __ Newton's 3rd Law of Motion __** - for every action there is an opposite and equal reaction.


 * __ Position __** - the place where an object or person is.


 * __ Potential energy __** - stored energy that can be released to become other forms of energy.


 * __ Prototype __** - an original model or design.


 * __ Pull __** - move something toward you.


 * __ Pulley __** - simple machine; a wheel with a grooved rim where you put a rope or a chain that can run to change the direction of the pull, making it easier to lift a load.


 * __ Push __** - move something away from you.


 * __ Ramp __** - simple machine; a slanted surface that connects different levels.


 * __ Recursive testing __** - retesting and revising a product; part of the technological design process.


 * __ Screw __** - simple machine; a thin pole with a raised ridge or thread wrapped around it in a spiral.


 * __ Simple machine __** - something that helps you do work and has few or no moving parts.


 * __ Slope __** - to be at an angle; not level.


 * __ Speed __** - a measure of how far an object moves in a certain amount of time. Speed = Distance / Time


 * __ Sir Isaac Newton __** - English mathematician and physicist, 1643 - 1727, who described gravity and the three laws of motion.

**__ Technological design __** - the process of designing and building products and systems to meet human needs. Step 1 - Identify the need or problem. Step 2 - Come up with a possible design or solution. Step 3 - Test and evaluate your design/solution. Step 4 - Develop a prototype.

**__ Template __** - a set pattern, mold or form.

**__ Tension __** - the force exerted by a stretched object, such as a spring or rubber band.

**__ Three view drawing __** - a diagram, showing top, side and front views of an object.

**__ Unbalanced force __** - when opposite sides have unequal forces; the object moves.

**__ Velocity __** - the speed and direction of an object's motion.

**__ Wedge __** - simple machine; a piece of metal or other material that has a pointed edge at one end and is thicker at the other end.

<span style="background-color: #d6d6d6; display: block; font-family: Arial,Verdana,sans-serif;">**__ Weight __** - a measurement of the force of gravity on an object.

<span style="background-color: #d6d6d6; display: block; font-family: Arial,Verdana,sans-serif;">**__ Wheel and Axle __** - simple machine; made up of a wheel and an axle that work together.

<span style="background-color: #d6d6d6; display: block; font-family: Arial,Verdana,sans-serif;">**__ Work __** - the act of moving someting. <span style="background-color: #d6d6d6; display: block; font-family: Arial,Verdana,sans-serif;">Work = Force x Distance.