Lesson Plan: B1.2.07


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

Context and
Landmark
Assessment		 B1.2.07
Landmark Assessment: Progress Observation Opportunity
Remember to have high expectations
Lesson Title: Today we are learning about
How does surface area affect transport?
Remember to check for PROGRESS
Focus on Knowledge, Skills and Understanding
Success Criteria: You will show your learning by...
  1. Water may move across cell membranes via osmosis.
  2. A single-celled organism has a relatively large surface area to volume ratio.
  3. Having a large surface area to volume allows sufficient transport of molecules into and out of the cell to meet the needs of the organism.
  4. Students should be able to calculate and compare surface area to volume ratios. (MS)
  5. Students should be able to explain the need for exchange surfaces in terms of surface area to volume ratio.
  6. Students should be able to explain why multicellular organisms have transport systems in terms of surface area to volume ration
  7. Students should be able to explain how the small intestine and lungs in mammals are adapted for exchanging materials.
  8. Students should be able to explain how the gills in fish are adapted for exchanging materials.
  9. Students should be able to explain how the leaves in plants are adapted for exchanging materials.
  10. In multicellular organisms, surfaces and organ systems are specialised for exchanging materials.
  11. Specalised surfaces allow sufficient molecules to be transported into and out of cells for the organism?s needs.
  12. The effectiveness of an exchange surface is increased by: ? having a large surface area ? a membrane that is thin, to provide a short diffusion path ? (in animals) having an efficient blood supply ? (in animals, for gaseous exchange) being ventilated.
Think about how you can match the needs of ALL students
Keywords:
  • Active Transport: the movement of a chemical across a partially permeable membrane against its concentration gradient using energy from respiration. (1)
  • Exchange surface: A specific surface in an organism adapted to transfer lots of chemicals across it, normally into or out of the blood. (1)
  • Surface Area to Volume Ratio: The volume of an object compared to the surface area it has. (1)
  • Surface Area: The total area of a surface. (1)
Links: Literacy, Numeracy, SMSC, British values
Memory Anchor:

AFL/Key Questions:
  1. What is the name of the process in which water moves across cell membranes?
    Osmosis
  2. What is the surface area to volume ratio of a single-celled organism like?
    A single-celled organism has a relatively large surface area to volume ratio.
  3. How does having a large surface area to volume ratio help cells?
    Having a large surface area to volume allows sufficient transport of molecules into and out of the cell to meet the needs of the organism.
  4. How do you calculate surface area to volume ratios?
    volume = width x height x bredth area = width x height display as a ratio
  5. Why do simple organisms need exchange surfaces?
    To allow for diffuse of substances in and out. They have high surface area to volume ratio to increase the rate of this.
  6. Why do multicelluar organisms need transport systems?
    Too complex for simple diffusion across a membrane so transport systems are needed to deliver substances to target organs/tissues.
  7. How are the small intestine and lungs in mammals adapted for exchanging materials?
    Lungs have a large surface area to volume ratio due to the structure of alveloi Small intestines have villi to increase their surface to volume ratio
  8. How are the gills in fish are adapted for exchanging materials?
    Gills have a large surface area, partially permable membrane.
  9. How are leaves in plants adapted for exchanging materials?
    Leaves have guard cells and spongy mesophyl with gaps
  10. How are multicellular organisms adapted for exchanging materials?
    Multicellular organisms have specalised surfaces and organ systems
  11. How do organisms get substances they need in and out of cells?
    Specalised surfaces allow sufficient molecules to be transported into and out of cells for the organism?s needs.
  12. How can the effectiveness of an exchange surface be increased?
    The effectiveness of an exchange surface is increased by: ? having a large surface area ? a membrane that is thin, to provide a short diffusion path ? (in animals) having an efficient blood supply ? (in animals, for gaseous exchange) being ventilated.
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