We see chairs made up of various materials, such as wood, iron, plastic. Class 6

We see chairs made up of various materials, such as wood, iron, plastic. Class 6

Question 1.

We see chairs made up of various materials, such as wood, iron, plastic, bamboo, cement and stones. Following are some desirable properties of materials which can be used to make chairs. Which materials used to make chairs fulfill these properties the most? Class 6

(i) Hardness (does not bend or shake on sitting even after long use).

(ii) Lightweight (easy to lift or to take from one place to another).

(iii) Does not feel very cold when sitting during winters.

(iv) Can be cleaned regularly and made to look new even after long use.

Answer:

(i) Iron, cement and stones

(ii) Plastic

(iii) Wood and bamboo

(iv) Plastic

Question 2.

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? Class 6

Answer:

1. Food wastes can be collected in plastic container, as plastic are leakage-proof. Hence, it can store degrading food wastes.
2. Broken glass can be collected in metallic containers or heavy duty plastic containers. As these materials are hard, hence can store sharp objects.
3. Wastepapers can be collected in paper packets or cardboard containers, as both are light weight materials and can easily contain dry materials.