Available Answers

1. 1.

   What would you do to make a metallic object regain its lustre after it has lost its sheen?

2. 2.

   Name two hard and two soft solids.

3. 3.

   Name two objects, the surfaces of which are smooth and two, the surfaces of which are rough.

4. 4.

   How do aquatic plants and animals survive in water?

5. 5.

   What do you mean by a solute and a solvent? Name two solids which are soluble and two which are insoluble in water.

6. 6.

   How will you know whether a substance is miscible or immiscible with water? Give two examples of each type.