Question

Name any three undesirable changes. Explain why they are considered undesirable.

Answer 1

Undesirable changes -

1. Earthquakes
2. Rusting of iron
3. Rotting of fruits and vegetables

Definition for undesirable change.

Undesirable changes are those changes that are harmful to live beings.

1. Earthquakes -

• Earthquakes are the shaking of the surface.
• It will result in the formation of tsunamis, landslides, fires, etc.
• Earthquakes harmfully affect living beings. Hence it is an undesirable change.

2. Rusting of iron

• Rusting of iron is an undesirable change because when the layer of rust forms on the surface of iron, it becomes flaky and weak.
• Rusting causes degradation of its strength.
• Rusted iron does not hold the desired properties of iron.

3. Rottening of fruits and vegetables

• Rotting of fruits and vegetables causes a change in colour, smell, etc.
• It will result in the spoilage of vegetables and fruits.
• It harmfully affects the health of living beings after eating them.