Year 9 Science · Unit 2 · Lesson 1
Foundation Worksheet
Learning Goals
Match each term to its definition
Draw a line connecting each term on the left to its correct definition on the right. Or write the matching letter next to each term.
| Term | Your answer | Definition |
|---|---|---|
| Material | A. Choosing a material based on how well its properties match a product's function and requirements. | |
| Property | B. A characteristic describing how a substance reacts or changes composition (e.g. reactivity with oxygen). | |
| Function | C. A characteristic that can be measured without changing the substance's identity (e.g. hardness, density). | |
| Physical property | D. Any solid, liquid, or gas used to make objects or structures. | |
| Chemical property | E. A measurable characteristic of a material, such as hardness or density. | |
| Material selection | F. The purpose or job a material performs in a given application. |
Fill the gap
Choose the correct word from the word bank to complete the passage. Each word is used once. Two words will not be used.
Engineers follow a systematic material process every time they design a product. The first step is to identify the what must the material do? Next, engineers list the required such as hardness, conductivity, or . They then compare against those requirements. Engineers must also consider : improving one property often reduces another. For example, adding carbon to steel increases hardness but reduces ductility. A material's characteristics can be either measured without changing the substance, or , which describe how the substance reacts with its environment.
1. Explain the difference between a physical property and a chemical property. Give one example of each.
2. Why is it important that engineers consider a material's properties before choosing it for a product? Give one reason.
Wrap Up
In one sentence, what was the main idea of this lesson?