📚 Topic Summary
Everything around us is made of matter, and different materials have different properties. These properties describe how a material looks, feels, and behaves. Understanding material properties helps us choose the right materials for different jobs! We'll look at things like flexibility (can it bend?), hardness (can it be scratched?), and absorbency (does it soak up water?).
🔬 Part A: Vocabulary
Match the term with the correct definition:
| Term |
Definition |
| 1. Hardness |
a. The ability to be bent easily without breaking. |
| 2. Flexibility |
b. The ability to absorb liquids. |
| 3. Absorbency |
c. The resistance of a material to being scratched. |
| 4. Transparency |
d. Allowing light to pass through so that objects behind can be distinctly seen. |
| 5. Opacity |
e. Not allowing light to pass through; not transparent. |
Answer Key: 1-c, 2-a, 3-b, 4-d, 5-e
🧪 Part B: Fill in the Blanks
Complete the following paragraph using the words: waterproof, rough, smooth, strength, texture.
The _________ of a material describes how it feels. For example, sandpaper has a _________ texture, while glass has a _________ texture. The _________ of a material is how well it resists breaking. A _________ material doesn't allow water to pass through.
Answer Key: texture, rough, smooth, strength, waterproof
🤔 Part C: Critical Thinking
Imagine you need to build a birdhouse that will last a long time outside in all kinds of weather. What material properties would be most important to consider, and what material would you choose? Why?
