Lesson Plan: C2.2.04


LESSON PLAN
Teacher Subject Period Date Year Ability LSA/Other Support
Science

Context and
Landmark
Assessment		 C2.2.04
Landmark Assessment: Progress Observation Opportunity
Remember to have high expectations
Lesson Title: Today we are learning about
What is cracking and why is it done?
Remember to check for PROGRESS
Focus on Knowledge, Skills and Understanding
Success Criteria: You will show your learning by...
  1. Hydrocarbons can be broken down (cracked) to produce smaller, more useful molecules.
  2. Cracking can be done by various methods including catalytic cracking and steam cracking.
  3. Students should be able to describe in general terms the conditions used for catalytic cracking and steam cracking.
  4. The products of cracking include alkanes and another type of hydrocarbon called alkenes.
  5. Students should be able to balance chemical equations as examples of cracking given the formulae of the reactants and products.
  6. Alkenes are more reactive than alkanes and react with bromine water, which is used as a test for alkenes.
  7. Students should be able to recall the colour change when bromine water reacts with an alkene.
  8. There is a high demand for fuels with small molecules and so some of the products of cracking are useful as fuels.
  9. Alkenes are used to produce polymers and as starting materials for the production of many other chemicals.
  10. Students should be able to give examples to illustrate the usefulness of cracking. They should also be able to explain how modern life depends on the uses of hydrocarbons. (For Combined Science: Trilogy and Synergy students do not need to know the formulae or names of individual alkenes.)
Think about how you can match the needs of ALL students
Keywords:
  • Polymer: a substance which has a molecular structure built up chiefly or completely from a large number of similar units bonded together. (1)
  • Industry: economic activity concerned with the processing of raw materials and manufacture of goods in factories. (1)
  • Catalyst: a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change. (1)
  • Cracking: decompose hydrocarbons by heat and pressure with or without a catalyst to produce lighter hydrocarbons, especially in oil refining. (1)
Links: Literacy, Numeracy, SMSC, British values
Memory Anchor:

AFL/Key Questions:
  1. What is cracking?
    Cracking is when hydrocarbons are broken down into smaller more useful molecules
  2. Describe the conditions required for catalytic cracking?
    Hydrocarbons are heated to vaporise them and passed through a hot catalyst breaking down the molecules into smaller ones by thermal decomposition
  3. How is cracking done using steam?
    Hydrocarbons are heated to vaporise them and mixed with steam and heated to very high temperatures breaking down the molecules into smaller ones by thermal decomposition
  4. What are the products of cracking?
    The products of cracking include alkanes and another type of hydrocarbon called alkenes.
  5. What is the balanced equation for the cracking of this alkane? C15H32 --> 2C2H4 C3H6 _______
    The balanced equation for the cracking is: C15H32 --> 2C2H4 + C3H6 + C8H18
  6. Why do do alkenes react with bromine water, but alkanes don't?
    Alkenes react with bromine water because they have a C=C making them more reactive than alkanes (which don?t react with bromine water)
  7. What is the chemical test and positive result for identifying alkenes?
    The chemical test for identifying alkenes is to add bromine water, the positive result is that the bormine was decolourises.
  8. Why is cracking of hydrocarbons so important?
    Cracking is important because there is a high demand for fuels with small molecules and so some of the products of cracking are useful as fuels.
  9. How are alkenes used in chemical industry?
    Alkenes are used to produce polymers and as starting materials for the production of many other chemicals.
  10. How does modern life depend on the uses of hydrocarbons?
    Hydrocarbons are used to produce fuels for transport, generating electricity. They are the raw materials for producing plastics and other chemicals.
Identify questions for high, middle, low and identify questioning techniques- Challenge questions

Learning Phases/Episodes
Think about how you can match the needs of ALL students
Differentiation: AGT, SEND, LLL, Disadvantaged
Remember to check for PROGRESS
Starter Activity Differentiation and Challenge question/task
  • Students to copy and complete the keywords.
  • Teacher reveals missing letters; Students correct mistakes;
  • Discuss the scientific meanings of the words.
  • Students to write down the definitions of the most important / new keywords.
  • Discuss the 'Memory Anchor'.
    • What does it show?
    • How does it relate to the what we are learning about today (title)?
Think about PACE – Develop, consolidate and deepen knowledge, skills and understanding
Teacher or Student lead? Differentiation and Challenge question/task
Progress Check Extension
Remember to give time to apply knowledge, skills and understanding
Teacher or Student lead? Differentiation and Challenge question/task
Progress Check Extension

Teacher or Student lead? Differentiation and Challenge question/task
Progress Check Extension

Teacher or Student lead? Differentiation and Challenge question/task
Progress Check Extension


Plenary Differentiation and Challenge question/task
  • Students to answer the 'Key Questions' with learning partners.
Progress Check
  • Teacher to reveal and discuss the answers to the questions.
 Extension
  • What have learnt about the 'Big Ideas' today?

Homework Differentiation and Challenge question/task