Classification of Metals – EduDelightTutors

Basic Technology JSS 1 First Term Lesson Notes – Week 8

Subject: Basic Technology

Class: JSS 1

Term: First Term

Week: 8

Age: 10 – 12 years

Topic: Metals II

Sub-topics:

I. Classification of Metals
II. Forms of Metal
III. Uses of Metals

Duration: 40 minutes

Behavioural Objectives:

By the end of the lesson, students should be able to:

Classify metals into different categories.
Identify the various forms in which metals are found.
Explain the uses of metals in everyday life.

Keywords:

Metals
Classification
Forms
Uses
Ferrous
Non-ferrous

Set Induction:

Present various metal objects like coins, utensils, and tools, and ask the students how these objects might have been made.

Entry Behaviour:

Students have encountered metal objects in their daily lives, such as kitchen utensils, tools, and wires.

Learning Resources and Materials:

Samples of metal objects (spoons, nails, wires)
Charts showing metal types, forms, and uses
Pictures of metals in everyday life

Building Background/Connection to Prior Knowledge:

In the previous lesson, students learned about the physical properties of metals, types of metals, and alloys. This lesson builds on that foundation.

Embedded Core Skills:

Observation
Critical thinking
Problem-solving
Analysis

Reference Books:

Lagos State Scheme of Work
Basic Technology Textbook for JSS 1

Instructional Materials:

Samples of various metal objects
Charts showing different classifications of metals
Pictures illustrating the forms and uses of metals

Content:

I. Classification of Metals
Metals can be classified based on their composition and magnetic properties. There are two major types of metals:

Ferrous Metals: These metals contain iron and are usually magnetic. Examples include steel, cast iron, and wrought iron.
Non-Ferrous Metals: These metals do not contain iron and are generally non-magnetic. Examples include aluminum, copper, and gold.

II. Forms of Metal
Metals come in different forms depending on how they are processed or refined:

Raw Form: Metals can be extracted from ores found in the ground. For example, iron ore is used to obtain iron.
Processed Form: Metals can be melted, shaped, or refined into bars, sheets, rods, or wires.
Alloys: As learned earlier, alloys are mixtures of two or more metals. For example, steel is an alloy of iron and carbon.

III. Uses of Metals
Metals are essential for many uses in everyday life due to their strength, conductivity, and durability. Some common uses of metals include:

Construction: Metals like steel and aluminum are used to build bridges, houses, and skyscrapers.
Electrical Wiring: Copper and aluminum are used in electrical wires due to their excellent conductivity.
Manufacturing Tools: Tools like hammers, screwdrivers, and spanners are made of metals like iron and steel.
Transportation: Cars, airplanes, and ships are made from metals like aluminum and steel.
Household Items: Many household objects like utensils, pots, and furniture are made from metals like stainless steel and aluminum.

Evaluation (Fill-in-the-blank questions):

Metals are classified into __________ and __________.
a) ferrous, non-ferrous b) soft, hard c) strong, weak d) light, heavy
Ferrous metals contain __________.
a) aluminum b) gold c) iron d) copper
Non-ferrous metals are usually __________.
a) magnetic b) non-magnetic c) brittle d) soft
An example of a non-ferrous metal is __________.
a) steel b) copper c) iron d) cast iron
Metals in their raw form are extracted from __________.
a) wood b) air c) ores d) water
Metals can be shaped into __________, rods, sheets, and bars.
a) ores b) wires c) coal d) rock
An alloy is a __________ of two or more metals.
a) type b) mixture c) form d) component
Steel is used in __________ due to its strength.
a) cooking b) construction c) decoration d) sewing
Copper is used in making __________ because it conducts electricity.
a) wires b) food c) spoons d) chairs
Tools like hammers and screwdrivers are made of __________.
a) plastic b) iron c) glass d) cloth
Cars and airplanes are made from metals like __________.
a) aluminum b) wood c) plastic d) paper
Pots and utensils are often made from __________ steel.
a) ferrous b) stainless c) rough d) carbon
Iron is extracted from __________.
a) coal b) ore c) water d) sand
A material made from iron and carbon is called __________.
a) copper b) wood c) steel d) plastic
__________ is commonly used in electrical wiring.
a) Copper b) Iron c) Zinc d) Bronze

Class Activity Discussion (FAQs):

What are ferrous metals?
Ferrous metals are metals that contain iron and are usually magnetic.
What are non-ferrous metals?
Non-ferrous metals do not contain iron and are generally non-magnetic.
What is an alloy?
An alloy is a mixture of two or more metals.
Why is copper used in electrical wiring?
Copper is a good conductor of electricity, which makes it suitable for wiring.
Where do metals come from?
Metals are extracted from ores found in the earth’s crust.
What are the different forms metals can take?
Metals can be in the form of wires, sheets, rods, or bars.
What is steel used for?
Steel is used in construction for making buildings, bridges, and vehicles.
Why are metals used in tools?
Metals are strong and durable, making them ideal for making tools.
What is the difference between ferrous and non-ferrous metals?
Ferrous metals contain iron and are magnetic, while non-ferrous metals do not contain iron and are non-magnetic.
How are metals used in household items?
Metals like stainless steel and aluminum are used to make pots, utensils, and appliances.
Why are metals important in transportation?
Metals are strong and durable, which makes them suitable for making vehicles like cars, ships, and airplanes.
What is the raw form of metal?
The raw form of metal is the metal ore extracted from the earth.
Can metals be recycled?
Yes, metals can be melted down and recycled into new products.
What is stainless steel?
Stainless steel is an alloy made from iron and other metals like chromium, making it resistant to rust.
What is the main use of aluminum?
Aluminum is used in making cans, airplanes, and electrical wiring because it is lightweight and corrosion-resistant.

Presentation:

Step 1: The teacher revises the previous lesson on “Metals: Identification, Types, and Alloys.”
Step 2: The teacher introduces the classification, forms, and uses of metals, explaining how they are processed and utilized.
Step 3: The teacher engages students in identifying different types of metals, their forms, and how they are used in their daily lives.

Teacher’s Activities:

Display metal objects and ask students to classify them as ferrous or non-ferrous.
Explain the different forms metals can take, such as sheets, rods, and wires.
Discuss various uses of metals in construction, transportation, and household items.

Learners’ Activities:

Observe and classify metal samples as ferrous or non-ferrous.
Participate in a discussion on the forms and uses of metals.
Take notes on how metals are used in different industries.

Assessment:

What are non-ferrous metals?
Give two examples of ferrous metals.
What is an alloy?
How are metals used in construction?
Name two uses of aluminum.
What form of metal is used in electrical wiring?
What is stainless steel?
What is the raw form of metal?
How are metals used in transportation?
Give one use of copper.

Evaluation Questions (Short Answer):

Define ferrous metals.
Name one use of iron.
What form of metal is used in construction?
Why is aluminum used in making airplanes?
Name two forms metals can take.
What is an alloy?
Mention one use of steel.
Name one use of metals in household items.
What is copper used for in everyday life?
Why are non-ferrous metals important?

Conclusion:

The teacher summarizes the lesson by reviewing the classification, forms, and uses of metals. The students’ notes are checked, and questions are asked to clarify understanding. The teacher gives the necessary corrections