Across
- 3. to change or vary day by daY
- 5. produce the most oil
- 7. another word for oil
- 8. most of the oil is taken from Earth by ____ wells
- 10. A system of money used by a country
- 12. is like currency
Down
- 1. oil in Latin means ______ oil
- 2. can also be used to bring oil to the surface
- 4. about 80 millions___ of oil are processed in the world each day
- 6. tiny creatures in the ocean
- 9. currency used by 19 European countries
- 11. is the second most-traded currency in the world.