DIRECTION: Classify the following sources of electricity whether mechanical, chemical, atomic, geothermal, hydrothermal, windmill, thermal, photoglectric, thermoelectric, piezoelectric.

1. Dry cell — Atomic
2. Cesium or selenium metal — piezoelectric
3. Magnetic field — hydrothermal
4. Iron strip & copper/nickel strip — mechanical
5. Crystal material — mechanical
6. Space satellites — windmill
7. Crude oils as fuel — chemical
8. Falling water on falls — hydrothermal
9. Underground stem — thermal
10. Wet cell — atomic