Question

What are slow and fast changes? Give examples.

Answer 1

Change:

Changes in energy are always accompanied by a particular chemical change or physical change.

• The change in which the molecular composition is completely altered and a new product is formed is called a chemical change, which is irreversible and permanent.
• During the physical change, the arrangement of molecules is altered leading to a change in state. No new products are formed, and the molecular composition remains totally the same. The changes are reversible and temporary.

Slow change:

• The changes that take place over a long period of time are known as Slow changes.
• Slow changes can take hours/days/months/years to occur.
• Examples of slow changes include rusting of iron as well as the Growing of trees.

Fast change:

• The changes that occur within a slow period of time are known as Fast changes.
• Fast changes can occur within seconds/minutes.
• Examples of fast change include the burning of paper as well as stretching a rubber band.