Across
- 2. A resource that has a limited number of uses before it is depleted
- 4. The name of the hydrocarbon with the formula CH4
- 7. A process used to separate crude oil into different components
- 8. The remains of an organism that lived and died millions of years ago and makes up crude oil
- 9. Crude oil is located in Earth’s _______
Down
- 1. Fractions in crude oil can be separated because they have different ____________
- 3. A substance derived from crude oil used for fuel
- 5. A compound containing hydrogen and carbon atoms only
- 6. A type of hydrocarbon with the formula CnH2n+2