Lesson Plan

6. Explore alloys

KS4-17-06

Learning Outcomes

Describe what's meant by the word alloy and state the properties of alloy. State the metals present in the alloys bronze, brass and alloys of gold and then state the uses of these alloys and uses of different forms of steel and alloys of aluminium

Higher: Can describe what's meant by the word alloy and state the properties of alloy. State the metals present in the alloys bronze, brass and alloys of gold and then state the uses of these alloys and uses of different forms of steel and alloys of aluminium
Middle:
Lower:

Activities

Mission Starter - Engage

Method:

Lesson Starter: Describe the common alloys of bronze, brass, gold, and steels.

Resources:

Lesson Starter Slides.

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:

Bronze: The first alloy | Chemistry – Materials: How They Work

Resources:

Expert Film

Mission Assignment - Elaborate

Method:

Cut out the boxes and match each alloy to what it is made from and its uses.

Draw a molecular diagram of brass

Draw a molecular diagram of copper

Define the terms:

alloy, high carbon steel, low carbon steel

Describe the composition of common alloys and their uses.

Resources:

Mission Assignment Slide

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

Recall a use of each of the alloys specified.

Teacher Mastery

Most metals in everyday use are alloys.

Bronze is an alloy of copper and tin. Brass is an alloy of copper and zinc.

Gold used as jewellery is usually an alloy with silver, copper, and zinc. The proportion of gold in the alloy is measured in carats, with pure gold being 24 carat. 18 carat gold is 75% gold.

Steels are alloys of iron that contain specific amounts of carbon and other metals. High carbon steel is strong but brittle. Low carbon steel is softer and more easily shaped. Steels containing chromium and nickel (stainless steels) are hard and resistant to corrosion.

Aluminium alloys are low density.

Curriculum Fields

National Curriculum

Interpret and evaluate the composition and uses of alloys other than those specified, given appropriate information.