Review:  Magnets 

1.  The needle of a compass always points _____________________

2.  The north pole of a magnet will _______________ the south pole of another magnet.

3.  The light from the sun bounces off the earth’s magnetic field  in far north places like Alaska.  This causes an effect known as the __________________ Borealis.  

4.  A common metal that is magnetic and often used to make nails:   ___________________ 

5.  Groups of atoms that are aligned at their poles are called magnetic ____________________ 

6. Who discovered that magnets are affected by electric current? ____________________ 

7.   If you place your hand around  a wire, your fingers will curl in the direction of the magnetic field.  This is known as the “Right __________ Rule”.   

8.  When a wire is wrapped around a nail and a current run through the wire, the nail becomes magnetized.  We can now call the nail an  ___________________________________. 

9.  This device is used to measure electric current: _________________________________ 

10. The device is used to convert electric energy into mechanical energy:   _____________________________

11. The type of current that comes into your house is called ______________________________ current. 

12.   The type of current that comes out of a battery is called ______________________________  current

13.  A  _______________________________ is used to increase or decrease voltage that enters a  house. 

14.  When you crank a flashlight to make it light, you are using a ____________________________. 

15. When current flows through the wires, what happens to the coils of this electric motor?  _______________