Physical Science -3.01

Electrons are important to electric current because they are able to 

• carry a positive charge as they transfer from atom to atom.
• move from one atom to another; the atom that looses an electron becomes positively charged and the atom that gains an electron becomes negatively charged. 
• shift from atom to atom changing from positive charge to negative charge.

The relationship between charges can be described by saying, 

• charges do not interact.
• negative charges attract.
• neutral charges repel.
• opposite charges attract. 

A material that has a strong resistance to the flow of electrons is a 

• conductor.
• semi/amp.
• insulator.
• resister. 

An example of an insulator would be

• water.
• rubber. 
• cooper.
• concrete. 

A(n) ____ is the building blocks of matter.

• proton
• neutron
• atom
• electron

Resistance is how well 

• a material conducts an electrical charge.
• a material repels a neutral charge. 
• a material attracts a positive charge to create current. 
• a material attracts a negative charge. 

You are searching for a connector to add between a battery and a light bulb. You should select a material that has the ability to 

• resist electron flow.
• accept neutron flow.
• resist proton flow.
• accept electron flow.

When a neutrally charged atom loses an electron to another atom, the result is the creation of

• two charged atoms.
• two negatively charged atoms.
• two positively charged atoms.
• two neutrally charged atoms. 

In order to be considered an ion, an atom must have a 

• positive charge.
• charge.
• negative charge.
• neutral charge. 

In order to be considered a semi-conductor the material must

• have insulator and conductor properties. 
• resist electron flow.
• have ions that are negative and accept charges. 
• easily accept electron flow.