II. Choose the letter of the correct answer. 11. Magnets have force that attracts materials made of a. copper b. wood c. plastic d. iron
12. When two magnets attract, they
a. pull together
b. change color
c. break
d. push apart
13. When two magnets repel, they
a. break
b. pull together
c. push apart
d. change color
14. Magnets have two ends, the north and south
a. region
b. color
c. pole
d. corner
15. When magnets are the force of magnetism is stronger.
a. farther apart
b. rectangular
c. round
d. closer together
16. If you break a magnet into pieces, the force exerted by it will
a. stay the same
b. decrease
c. increase
d. get stronger
17. Magnets have invisible
a. magnetic field
b. electric current
C. sound waves
d. signals
18. The place where magnetic force of a magnet is strongest is at
a. ends
b. edge
c. sides
d. all parts​