You need to have containers for collection of (i) food waste, (ii) broken glass and (iii) wastepaper. Which materials will you choose for containers of these types of waste? What properties of materials do you need to think of?
For food waste containers: Plastic or metal containers with tight-fitting lids are suitable. Required properties include being waterproof, durable, easy to clean, and preferably opaque to hide the contents and prevent odour spread.
For broken glass containers: Thick plastic or metal containers with sturdy walls are needed. Required properties include hardness to prevent puncture, opaque material to hide sharp contents, and durability.
For wastepaper containers: Any material like plastic, cardboard boxes, or woven baskets works. Required properties include being lightweight and large capacity, and can be opaque or transparent since paper is not hazardous.
Explanation
The chapter emphasizes on Page 4 that we choose materials to make objects depending on their properties and the purpose for which the object is to be used. Properties like transparency, hardness, solubility, and durability determine the suitability of materials for specific purposes.
Solution Steps
Food waste containers: Plastic or metal with tight-fitting lids; properties include waterproof, durable, easy to clean, and opaque
Broken glass containers: Thick plastic or metal with sturdy walls; properties include hardness, opaque material, and durability
Wastepaper containers: Any material works; properties include lightweight and large capacity