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6. When was the first gasoline fuelled car made?
7. When was the first oil well built?
8. When were mules first used for transporting cargo?
- 1000 BC
- 2000 BC
- 3000 BC
- 4000 BC
9. What percentage of the energy in a house is lost through the windows?
10. When was coal first used as a fuel?
- 1200- 860 BC
- 1000- 851 BC
- 1100- 850 BC
- 1000- 852 BC
11. When was solar power first used?
- 4000 BC
- 3000 BC
- 2000 BC
- 1000 BC
12. When did humans first learn how to use fire for cooking?
- 1000 BC
- 100 BC
- 1 million BC
- 2 million BC