Question

1. a hard, silver - white magnetic metal, easily rusts in...

a. copper b. iron c. magnetic d. nickel

1. one of the opposite or contrasted parts or directions in which a polar force is manifested

a. center b. copper c. pole d. core

Explanation:

For question 6: Iron is a hard, silver - white magnetic metal that easily rusts. Copper is usually reddish - brown and not as magnetic as iron. Magnetic is an adjective, not a metal. Nickel is silver - white but not as commonly associated with easy rusting as iron.
For question 7: In magnetism, a pole is one of the opposite or contrasted parts (north and south poles) in which a polar force is manifested. Copper is a metal. Core is the central part.

Answer:

1. B. Iron
2. C. pole