CCDS 7th Grade Science Test: Work, Simple Machines, and Energy

23 terms by jemmanuel170

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Work

force that is being moved a certain distance measured in joules (J)

Energy

the ability to do work

Mechanical Energy

energy in an object because of its motion or position

Potential Energy

related to the object's position; car balanced on a mountain top

Kinetic Energy

energy an object has because it is moving; big truck moving faster than a small truck

Electrical Energy

negatively charged energy flowing through a conductor

Nuclear Energy

energy kept in a nucleus

Thermal Energy

heat energy; energy related to the temperature of a substance; water boiling in a pot

Sound Energy

energy traveling through mechanical waves; megaphone

Convection

(thermal energy); is the transfer of heat in a fluid through CURRENTS

Conduction

(thermal energy); is the transfer of heat from a warmer substance to a cooler substance through DIRECT CONTACT

Radiation

(thermal energy); is the transfer of energy as electromagnetic waves (SUN). CAN OCCUR THROUGH EMPTY SPACE.

Electromagnetic Energy

energy caused by negatively charged particles in motion;

Energy Conversions

follows the Law of Conservation of energy; a form of energy turning into a different type of energy

Law of Conservation of Energy

Energy cannot be created or destroyed

Screw

an inclined plane with a cylinder wrapped around it

Wedge

an inclined plane that moves and causes objects to either slpit or lift

Wheel and Axle

a simple machine that is a shaft (axle) inserted through a wheel

Inclined Plane

a simple machine that is a flat, sloping surface

Pulley

a simple machine with wheel(s) with a rope wrapped around it

Lever

a simple machine that is a bar balancing on a fulcrum

Effort

force applied on a lever

Load/Resistance

load/resistance is the object being pushed up by the effort force

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