Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. Where does crude oil come from?
   • Crude oil is a finite resource found in rocks. Crude oil is the remains of an ancient biomass consisting mainly of plankton that was buried in mud.
2. Is crude oil a mixture of elements, compounds or both?
   • Crude oil is a mixture of a very large number of compounds called hydrocarbons.
3. What is the definition of a hydrocarbon?
   • Hydrocarbons are molecules made up of hydrogen and carbon atoms only.
4. Does crude oil contain mostly alkanes or alkenes?
   • Most of the hydrocarbons in crude oil are hydrocarbons called alkanes
5. What are the names of the first four members of alkanes?
   • The first four members of the alkanes are: methane, ethane, propane and butane.
6. What is the general formula for alkane molecules?
   • The general formula for the homologous series of alkanes is CnH2n 2.
7. Which of the following are examples of alkanes: C4H10, C2H4, C5H12?
   • C4H10 and C5H12 are both examples of alkanes.
8. Name the alkane with: a) 1 carbon b) 2 carbons c) 3 carbons d) 4 carbons
   • a) Methane b) Ethane c) Propane d) Butane