electricity and magnetism

An ______________ is a complete path that an electric current can flow around. 

• conductor
• electrical circuit
• electromagnet
• closed circuit

__________ are made of materials that let electricical energy flow through them easily. 

• electrical circuit
• insulators
• open circuit
• conductors

An _____________ is a magnet formed when electricity flows through a coil of wire wrapped around an iron nail. 

• electromagnet
• electrical circuit
• insulator
• conductor

_________ are made of materials that do not let electrical energy flow through them. 

• open circuit
• electromagnet
• insulator
• conductor

A ____________ is a circuit that is not broken. Electricity flows from the battery to the lightbulb without interruption. THe lightbulb is on. 

• closed circuit
• open circuit
• electromagent
• insulator

True / False
Magnets can not be used to generate electricity. 

• true
• false

True  / False
Like charges attract and unlike charges repel.

• true
• false

True / False
Lightning is an example of static electricity. 

• True
• False

If the lightbulb is off, the circuit is _______.

• open 
• closed

A student placed a pencil in a cup of water.  The pencil appears broken because light-

• always travels in a straight line
• bends when it passes through water
• makes the water in the glass evaporate
• reflects the pencil on the water's surface