Across
- 4. Alkanes are _______________ hydrocarbons as they only have the C-C bond
- 5. _______________ are compounds made of ONLY hydrogen and carbon atoms.
- 6. Alkenes are ______________ hydrocarbons as they contain the C=C bond
- 9. Crude oil can be separated into its fractions by ______________ __________________.
- 10. Product 2 when hydrocarbons react completely with oxygen.
Down
- 1. Product 1 when hydrocarbons react completely with oxygen.
- 2. Natural gas is mainly made up of _______________.
- 3. Fractional distillation separates substances with different _____________ ___________.
- 7. Crude oil is a m_____________ of hydrocarbons.
- 8. Biofuels can be replaced relatively quickly after use. They are known as ________________ energy sources.