METALS I

1. Electricity is a flow of ______ moving by a copper wire.

2. On buildings walls, We can see copper pipes transporting ________.

3. Spinning a ______ inside a copper coil we can obtain electricity in this coil.

4. If we connect a _____ to a copper coil with a magnet inside, this magnet starts to spin.

5. A ______ is a machine that produces electricity by spinning a magnet inside a copper coil.

6. An engine is a machine that produces ______ applying electricity to a copper coil.

7. Attaching a ______ to a magnet we can spin it using natural media.

8. Nowdays we use water or wind to spin turbines in ______ without polluting.

9. We can use also water _______but polluting because we have to heat water burning gas or oil.

10. Finally we can also produce steam by heating water with ______ materials. The problem is to store these materials once their useful life is over.