Grade 7/8 Systems in Action JEOPARDY T H I S I S J E O P A R D Y

A simple machine consisting of a sloping surface on which an object can move. What is an inclined plane.

A machine that requires the application of a single force to do work. What is a simple machine.

Forces that act between object that are touching. What are contact forces.

Work that a machine is designed to perform. What is useful output work.

This diagram is an example of this type of lever. What is a first class lever. fulcrum input force output force

Forces that can push or pull an object without touching it. What are action-at-a-distance forces. What are non-contact forces.

A force of attraction between two objects because of their mass. What is gravity.

The analysis of numerical data. What is a quantitative assessment.

A lever that has the input force between the fulcrum and the output force and the input force and the output forces are in the same direction. What is a third class lever.

The amount of matter in an object. What is mass.

A group of physical parts that interact with each other and function as a whole in order to complete a task. What is a mechanical system.

The most common force meter, consisting of a spring with a hook on the end; as more force is applied to the hook, the spring stretches farther. What is a spring scale. What is a Newton gauge.

A simple machine consisting of an inclined plane that travels through an object or material. What is a wedge.

The amount of effort expended when a force causes an object to move a distance and energy is transferred. What is work.

The energy of an object in motion. What is kinetic energy.

Potential energy of an object that is able to fall. What is gravitational potential energy.

The ideal mechanical advantage of this pulley system. What is 3.

Any mechanical system that reduces the force required to accomplish work. What is a machine.

The force applied to a machine. What is the input force.

The force that a machine applies to an object. What is the output force.

The amount by which a machine can multiply an input force. What is mechanical advantage.

?? = What is mechanical advantage. F out F in

A simple machine consisting of a shaft or axle that is attached to a larger disk called the wheel. What is a wheel and axle.

??? = What is ideal mechanical advantage. d in d out

Forces that oppose the relative motion of an object. What is friction.

A simple machine consisting of an inclined plane wrapped around a rod. What is a screw.

A combination of simple machines working together to perform a specific function. What is a mechanism.

The ability to do work. What is energy.

A simple machine made up of a rigid bar that is supported at one point. What is a lever.

Energy that is stored in a material or physical system that is compressed or stretched. What is elastic potential energy.

The point at which a lever is supported. What is a fulcrum.

Energy that is stored in an electrical charge, which can be exerted upon another charge when they are brought near each other. What is electric potential energy.

A push or pull that acts on an object. It is measured in Newtons (N). What is force.

This diagram is an example of this type of pulley. What is a fixed pulley. F out F in

A city bus. What is a mechanical system.

A lever that always has the fulcrum between the input and output forces and the output force is always in the opposite direction to the input force. What is a first class lever.

Earth’s gravitational field strength, or Earth’s gravitational constant. What is 9.8 N/kg.

A lever that has the output force between the fulcrum and the input force. What is a second class lever.

A simple machine consisting of a grooved wheel with a rope or cable looped around it; can change the direction of the force or increase the output force, depending on whether it is fixed or moveable. What is a pulley.

The amount of force on an object due to gravity. What is weight.

The energy that is stored. What is potential energy.

This picture is an example of this type of simple machine. What is a second class lever.

Measurement of the useful work done by a machine compared to the work needed to operate the machine. What is efficiency.

A procedure or process designed to perform a task along with the people involved. What is a non-mechanical system.

The parts of a system. What are components.

The mechanical advantage of a machine that has no friction. What is the ideal mechanical advantage.

This type of pulley only changes the direction of the force. What is a fixed pulley.

This diagram is an example of this type of pulley. What is a moveable pulley. F in

An individual who uses the goods or services provided by a system. What is the consumer.

Energy that is stored in atoms and the bonds between atoms and can be released by various chemical reactions. What is chemical potential energy.

The amount of output that is produced per unit of time. What is productivity.

How much I weigh. What is my mass.

The analysis made by observation. What is a qualitative assessment.

A city bus schedule and route maps. What is a non-mechanical system.

This measure of force changes depending on the gravity present. What is weight.

Uses the kilogram as the unit of measure. What is mass.

During the transfer of energy, the total amount of energy remains constant, meaning that you cannot create nor destroy energy. What is the Law of Conservation of Energy.

A rake, a baseball bat, and a canoe paddle are all examples of this. What are third class levers.

These fill the gaps between two surfaces, making it easier for those surfaces to slide past each other, and reducing friction. What are lubricants.

This diagram is an example of this type of lever. What is a third class lever. fulcrum input force output force

The replacement of human workers with machines that are controlled by a computer. What is an automated system.

This diagram is an example of this type of lever. What is a second class lever. fulcrum input force output force