When can you say a material is waterproof material?

Short/Brief Note

Materials that do not allow water to pass through them are called waterproof materials.
Example: raincoat, aluminium foil of tablet strip.

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Chapter 2 Matter and Materials
Evaluation | Q V 1. | Page 102

Very Short Answer Type Question:

Select a lustrous material out of the following substances.

Short Answer Type Question:

What is the reason for grouping materials?

Materials which can be bent or stretched easily are called ______.

We cannot compress, cut or bend the rough materials easily.

Name five objects which can be made from wood.

Oil mixes with water.

Soft materials can be early compressed.

Soft material ______.

Boojho found a bag containing the following materials

Help Boojho in finding out the material(s) which is/are opaque.

Which pair of substances among the following would float in a tumbler half filled with water?