Lesson Plan: C2.5.03


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

Context and
Landmark
Assessment		 C2.5.03
Landmark Assessment: Progress Observation Opportunity
Remember to have high expectations
Lesson Title: Today we are learning about
How is water made safe for human consumption?
Remember to check for PROGRESS
Focus on Knowledge, Skills and Understanding
Success Criteria: You will show your learning by...
  1. Water of appropriate quality is essential for life. For humans, drinking water should have sufficiently low levels of dissolved salts and microbes.
  2. Urban lifestyles and industrial processes produce large amounts of waste water that require treatment before being released into the environment.
  3. Water that is safe to drink is called potable water. Potable water is not pure water in the chemical sense because it contains dissolved substances.
  4. Sewage and agricultural waste water require removal of organic matter and harmful microbes. Industrial waste water may require removal of organic matter and harmful chemicals.
  5. The methods used to produce potable water depend on available supplies of water and local conditions.
  6. Sewage treatment includes: ? screening and grit removal ? sedimentation to produce sewage sludge and effluent ? anaerobic digestion of sewage sludge ? aerobic biological treatment of effluent.
  7. In the United Kingdom (UK), rain provides water with low levels of dissolved substances (fresh water) that collects in the ground and in lakes and rivers, and most potable water is produced by: - choosing an appropriate source of fresh water - passing the water through filter beds - sterilising.
  8. Students should be able to comment on the relative ease of obtaining potable water from waste, ground and salt water.
  9. Sterilising agents used for potable water include chlorine, ozone or ultraviolet light.
  10. If supplies of fresh water are limited, desalination of salty water or sea water may be required.
  11. Desalination can be done by distillation or by processes that use membranes such as reverse osmosis.
  12. These processes require large amounts of energy.
  13. Students should be able to distinguish between potable water and pure water.
  14. Students should be able to describe the differences in treatment of ground water and salty water.
  15. Students should be able to give reasons for the steps used to produce potable water.
Think about how you can match the needs of ALL students
Keywords:
  • Desalination: The process of removing salt from seawater. (1)
  • Sterilise: Make (something) free from bacteria or other living microorganisms. (1)
  • Sewage: Waste water and excrement conveyed in sewers (1)
  • Potable: Water that is safe to drink. (1)
Links: Literacy, Numeracy, SMSC, British values
Memory Anchor:

AFL/Key Questions:
  1. What should the quality of drinking water be like?
    The quality of drinking water should have low levels of dissolved salts and microbes.
  2. What must be done to the waste water produced by urban lifestyles and industrial processes before it can be released back into the environment?
    Urban lifestyles and industrial processes produce large amounts of waste water that require treatment before being released into the environment.
  3. What is the name given to water that is safe to drink?
    The name given to water that is safe to drink is potable water.
  4. What will be required to be removed from a) agricultural waste water and b)industrial waste water?
    Agricultural waste water require removal of organic matter and harmful microbes. Industrial waste water may require removal of organic matter and harmful chemicals.
  5. What factors decide which methods are used to produce potable water?
    The methods used to produce potable water depend on available supplies of water and local conditions.
  6. What does sewage treatment include?
    Sewage treatment includes: - screening and grit removal - sedimentation to produce sewage sludge and effluent - anaerobic digestion of sewage sludge - aerobic biological treatment of effluent.
  7. What stages do most of the potable water in the UK produced?
    The stages that most potable water is produced in the UK is: - choosing an appropriate source of fresh water - passing the water through filter beds - sterilising.
  8. How is potable water obtained from a) waste ground and b) salt water?
    Potable water can be obtained from waste ground through the three main stages of sedimentation, filtration and sterilizing. Potable water can be obtained from salt water through desalination by distillation or reverse osmosis.
  9. What are three types of sterilising agents used for potable water?
    Sterilising agents used for potable water include chlorine, ozone or ultraviolet light.
  10. What process can be used to make salt water / sea water potable when fresh water is limited?
    If supplies of fresh water are limited, desalination of salty water or sea water may be required.
  11. How is desalination completed? (give two methods)
    Desalination can be done by distillation or by processes that use membranes such as reverse osmosis.
  12. What is the main drawback of desalination processes?
    Desalination processes require large amounts of energy.
  13. What is the difference between potable and pure water?
    Pure water only contains water particles with no other substances. Potable water is safe to drink but contains other soluble ions.
  14. What is the differences in the way that ground water and salty water is treated?
    Salty water is treated by distillation or by reverse osmosis. Ground water is treated by - passing the water through filter beds and then sterilising using chlorine, ozone or UV light.
  15. What are the reasons for each step of producing potable water from ground water?
    Potable water is filtered to remove any fine particles in the water. It is then steralised to kill microbes.
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