End of Week Review

• Atoms are composed of Protons Electrons and Neutrons.

• Protons have a positive charge.

• Electrons have a negative charge and can move.

• Neutrons are neutral have no charge at all.

• Any material that will let electrons pass through it easily are called conductors.  Some examples of conductors are copper, iron, gold.  Most wire is made of copper.  

• Materials that will not let electrons pass through it easily are called insulators.  Some examples of insulators are paper, glass, plastic, and rubber.  

• Electrons flow inside wire when a voltage is applied from a battery.

• Electrons flow from the negative terminal of a battery, through the circuit and back to the positive side of a battery.

• Voltage is the pressure that causes current to flow. 

• Current is electrons moving in a wire.  Current is sometimes called charge in motion because it is electrons (charged particles)  moving in a wire.

• Resistance holds back on the current flow.  Lamps have resistance. 

• Current will flow through a circuit only if there is a complete path.

• Water will conduct electricity.  You should never work around electricity when you are wet or sweaty.  

• Static electricity is charged particles at rest.

• Like charges repel. Positive charges are repelled from positive potential. Also Negative charges are repelled from negative potential.  

• Unlike charges attract.

When doing the Check-Up, remember to use your area code and phone number as your student ID and your correct email address and name.  Your score will be emailed along with comments from the teacher.   Now choose Check-Up in the menu to see how much you learned.