Activity 3.1 Class 10 Science Metals and Non-Metals

This activity explains the metallic lustre the specific characteristics of metals.

Table of Contents

To observe the colour and surface appearance of different

1. Samples of four metals – iron , copper , aluminium and magnesium

2. Sandpaper

We take sample pieces of four metals – iron, copper, aluminium and magnesium and
place them on a table and observe their surface appearance.

After that, we rub each sample with sandpaper and observe the surface appearance
again.

Metal surface appear dull because their surface gets covered with layer of dust of
oxide and this hides the natural shine or lustre of the metal.

When we rub the metal surface, this layer is removed and shiny surface appears.

This activity explains the metallic lustre which is a physical property of metals.

1. What property of metals is discussed in this activity?

Answer
Metallic lustre

2. Is the oxide layer harmful to the metal?

Answer

No, it is not harmful instead it protect the metal from further corrosion.

3. What is metallic lustre?

Answer
Metallic lustre is the natural shine or brightness on metal surface.