Lesson Plan

5. Explore rusting

KS4-17-05

Learning Outcomes

Describe what's meant by the word corrosion, the conditions required for rusting and how to prevent corrosion, including sacrificial protection

Higher: Can describe what's meant by the word corrosion, the conditions required for rusting and how to prevent corrosion, including sacrificial protection
Middle:
Lower:

Activities

Mission Starter - Engage

Method:

Lesson Starter: What is rusting? Give examples of things that rust. What do you think causes rust to form on objects?

Resources:

Lesson Starter Slide

The Story - Explore and Explain

Method:

Answer questions and take part in activities during the presentation. Stop the presentation at the relevant slides: Talk Partners; AfLs; Songs. Take part in the Choral Response Questions activity (see Assessment section) after the Keywords/Rocket Words slide.

Resources:

Presentation Sticky notes

Mission Expert - Explain

Method:

Chemistry - Rust - BBC Learning

Resources:

Expert Film

Mission Assignment - Elaborate

Method:

1. Complete the QuickFire Question Round

2. Complete the Interpreting data task

3. Draw and label an example that explains how corrosion can be prevented using a sacrificial barrier.

 

Resources:

Mission Assignment Film 

Handout

Mission Log - Evaluate

Method:

Quiz With their talk partners, the children are to go through the quiz at the end of the presentation and answer the questions. Formative Assessment Forms Students are to complete these forms where present. Assessment Trays Ask the children to place their Handouts, notebooks, Formative Assessment Forms, Investigation Sheets, into either the Discover tray or Explorer tray * Explain that the green tray means that the learner has understood the lesson well, and that the red tray means that the learner needs more time to practise. * use whichever colours of tray you have in stock, or prefer to use for this. Children to take interactive Assessment Quiz to test lesson comprehension.

Resources:

Quiz in presentation Formative assessment forms Assessment trays Interactive quiz

Assessment

Questions to Ask During the Lesson

What's the difference between rusting and corrosion?

Teacher Mastery

Corrosion is the destruction of materials by chemical reactions with substances in the environment. Rusting is an example of corrosion. Both air and water are necessary for iron to rust.

Corrosion can be prevented by applying a coating that acts as a barrier, such as greasing, painting or electroplating. Aluminium has an oxide coating that protects the metal from further corrosion.

Some coatings are reactive and contain a more reactive metal to provide sacrificial protection, eg zinc is used to galvanise iron.

Curriculum Fields

National Curriculum

Describe experiments and interpret results to show that both air and water are necessary for rusting. Explain sacrificial protection in terms of relative reactivity.

Working Scientifically Skills

Communicating the scientific rationale for investigations, including the methods used, the findings and reasoned conclusions, using paper-based and electronic reports and presentations