Lesson Plan: P1.5.01


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

Context and
Landmark
Assessment		 P1.5.01
Landmark Assessment: Progress Observation Opportunity
Remember to have high expectations
Lesson Title: Today we are learning about
How has the model of the atom changed over time?
Remember to check for PROGRESS
Focus on Knowledge, Skills and Understanding
Success Criteria: You will show your learning by...
  1. New experimental evidence may lead to a scientific model being changed or replaced.
  2. Before the discovery of the electron, atoms were thought to be tiny spheres that could not be divided.
  3. The discovery of the electron led to the plum pudding model of the atom.
  4. The plum pudding model suggested that the atom is a ball of positive charge with negative electrons embedded in it.
  5. The results from the alpha particle scattering experiment led to the conclusion that the mass of an atom was concentrated at the centre (nucleus) and that the nucleus was charged. This nuclear model replaced the plum pudding model.
  6. Niels Bohr adapted the nuclear model by suggesting that electrons orbit the nucleus at specific distances. The theoretical calculations of Bohr agreed with experimental observations. Details of experimental work supporting the Bohr model are not required.
  7. Later experiments led to the idea that the positive charge of any nucleus could be subdivided into a whole number of smaller particles, each particle having the same amount of positive charge. The name proton was given to these particles.
  8. The experimental work of James Chadwick provided the evidence to show the existence of neutrons within the nucleus. This was about 20 years after the nucleus became an accepted scientific idea. Details of Chadwick?s experimental work are not required.
  9. Students should be able to describe why the new evidence from the scattering experiment led to a change in the atomic model.
  10. Students should be able to describe the difference between the plum pudding model of the atom and the nuclear model of the atom.
Think about how you can match the needs of ALL students
Keywords:
  • Charge: the property of matter that is responsible for ellectricity existing in a positive or negative form. (1)
  • Technology: the application of scientific knowledge for practical purposes, especially in industry. (1)
  • Orbit: the path of an electron round an atomic nucleus. (1)
  • Alpha particle: a helium nucleus emitted by some radioactive substances. (1)
Links: Literacy, Numeracy, SMSC, British values
Memory Anchor:

AFL/Key Questions:
  1. Why might the scientific model of the atom change over time?
    Due to technological advances.
  2. What where the atoms thought to be like before the discovery of the atom?
    Before the discovery of the electron, atoms were thought to be tiny spheres that could not be divided.
  3. What did the discovery of the electron lead to?
    The discovery of the electron led to the plum pudding model of the atom.
  4. What did the plum pudding model suggest?
    The plum pudding model suggested that the atom is a ball of positive charge with negative electrons embedded in it
  5. What did the results from the alpha particle scattering experiment lead to?
    The results from the alpha particle scattering experiment led to the conclusion that the mass of an atom was concentrated at the centre (nucleus) and that the nucleus was charged. This nuclear model
  6. How did Niel Bohr adapt the nuclear model?
    Niels Bohr adapted the nuclear model by suggesting that electrons orbit the nucleus at specific distances.
  7. What did later experiments on the atom lead to?
    Later experiments led to the idea that the positive charge of any nucleus could be subdivided into a whole number of smaller particles, each particle having the same amount of positive charge. The name proton was given to these particles.
  8. What did the experimental work of James Chadwick provide evidence of?
    The experimental work of James Chadwick provided the evidence to show the existence of neutrons within the nucleus. This was about 20 years after the nucleus became an accepted scientific idea.
  9. Describe why the new evidence from the scattering experiment led to a change in the atomic model.
    Evidence from the scattering experiment led to a change in the atomic model.
  10. What is the difference between the plum pudding model of the atom and the nuclear model of the atom.
    In the plum pudding model the atom was imagined to be a sphere of positive charge with negatively charged electrons dotted around inside it like plums in a pudding.
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