Basic 3 · Science · Materials
Objects Made of One or More Materials
In this topic you will learn that some objects are made of one material and others of many materials.
By the end of these notes you should be able to:
- Identify objects made of one material
- Identify objects made of more than one material
- Name the materials in an object
What you already know
- Materials and their uses
Copy everything that has a blue line on its left into your notebook. The other parts are for reading.
- Strand
- Diversity Of Matter
- Sub-strand
- Materials
- Indicator
- B3.1.2.1.2 – Demonstrate understanding that an object is made of one or more materials
Introduction
A spoon is made only of metal. A pencil is made of wood, graphite and sometimes rubber. Objects can have one or many materials.
1. One Material or Many?
| Object | Materials |
|---|---|
| metal spoon | metal |
| glass cup | glass |
| pencil | wood, graphite, rubber, metal |
| chair | wood, metal nails |
| school bag | cloth, plastic, metal zip |
| bicycle | metal, rubber, plastic |
2. Why Use Many Materials?
Each part of an object needs a different property.
A bicycle frame is metal because it is strong. The tyres are rubber because they grip the road.
New words
- object
- A thing you can see and touch.
- graphite
- The soft grey material that writes in a pencil.
- part
- A piece of something.
- grip
- To hold firmly.
Summary
- Some objects are made of one material.
- Many objects are made of more than one material.
- Each part uses the material that suits it.
Class activity: Material Detectives
- Look at classroom objects.
- List the materials in each.
- Sort them into "one material" and "many materials".
You need: Wood offcut, Metal spoon, Clear plastic bottle
Exercises
Answer in your exercise book first, then check your answers.
1. Which object is made of only one material?
- A. Metal spoon
- B. Pencil
- C. Bicycle
- D. School bag
Show answer
Answer: Metal spoonIt is only metal.2. What part of a pencil writes?
- A. Graphite
- B. Wood
- C. Rubber
- D. Metal band
Show answer
Answer: GraphiteGraphite leaves marks.3. A bicycle is made of many materials.
- A. True
- B. False
Show answer
Answer: TrueMetal, rubber and plastic.4. Bicycle tyres are made of glass.
- A. True
- B. False
Show answer
Answer: FalseTyres are rubber.5. The soft grey material in a pencil is ______.
Show answer
Answer: graphiteIt writes.6. Name the materials in a chair.
Show answer
Answer: E.g. wood and metal nails.Chairs often use more than one material.
Homework
- Choose one object at home with many materials. Draw and label it.