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Electricity
Mrs. Robichaud
13
Science
7th Grade
05/23/2011

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Cards

Term
Electricity - 2 forms
Definition
current and static
Term
Electricity
Definition
a form of energy
Term
conservation of energy - relationship to electricity
Definition
circuits
Term
relationship between electron movement and ability to do work
Definition
when electrons move, it creates a charge, producing energy, which is the ability to work (like a lightbulb)
Term
Electrical current
Definition
The result of the motion of charged particles across a conductor
Term
What does physical contact do to electrons?
Definition
Electrons can be transferred from one object to another (static electricity)
Term
What does electric current need?
Definition
Voltage source and a complete circuit
Term
Static electricity occurs because?
Definition
electric charges build up on surface of material
Term
Are magnetic force and electrical force related?
Definition
Yes - positive and negative electrons
Term
characteristics that make good insulator and conductor
Definition
insulator: rubber, wood, glass - charged particles cant move through easily
conductors: material that electricity can omve through easily - iron copper and aluminum
Term
What are the requirements to make a light bulb light up?
Definition
full circuit, has to have a dry cell battery, flow of electrons
Term
How are electrons transferred in static discharge?
Definition
electrons are transferred to an object creating an imbalence of positive and negative charges
Term
Why is static electricity more prevalent in winter?
Definition
Because of lack of humidity -- humidity in the air makes it harder for electricity pass through?
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