Across
- 1. One fuel that can be used in place of petroleum is _____________, which comes from plants and animals.
- 7. A ___________ is a compound made up of hydrogen and carbon only.
- 8. ________________ is used as fuel for aircraft engines.
- 9. Petroleum is also called ___________ oil.
- 10. Most ____________ compounds contain the element carbon.
- 12. _______________ is used as feedstock for making petrochemicals such as plastics and detegents.
- 13. ________________ is used to make road surfaces.
- 14. Both petroleum and ______________ gas are fossil fuels.
Down
- 2. A ___________ group is an atom or group of atoms that gives a molecule its characteristic properties.
- 3. Petroleum can be separated into useful fractions by _______________ distillation.
- 4. A hydrocarbon with ___________ carbon atoms will have a higher boiling point.
- 5. Members of a homologous series have the same ___________ properties.
- 6. Petroleum must be conserved as it is a ________________ resource.
- 11. A homologous series that contains the carbon-carbon double bond.
- 15. The lightest fraction of petroleum is found at the ___________ of the fractionating column.