Types of Changes
Types of Changes: Overview
This Topic covers sub-topics such as Changes around Us, Periodic Changes, Non-Periodic Changes, Harmful Changes, Types of Changes around Us and, Useful Changes
Important Questions on Types of Changes
Which of the following changes can be reversed?
The pictures show two types of change in objects.
Which statements about the two changes are true?
Ripening of fruit is a change taking place around us.
What changes take place during melting of ice?
State whether the following statement is true or false. If false write the correct statement:
The occurrence of the earthquake is a periodic change.
What is a non-periodic change? Give two examples for it.
The change of season is a periodic change but the change of weather is non-periodic. Give reasons to your answer.
Differentiate between:
Desirable and Undesirable changes.
Choose the right word and fill in the blank provided below.
When we heat water in a pan, it begins to boil after some time. If we continue to heat further, the quantity of water in the pan will _____. (decrease, increase)
Give one word for the following:
Melting is the reverse of this process:
Mention any three changes that can be brought about by heating. Explain how these changes can be done.
Are changes important to us? Explain with examples.
Define desirable and undesirable changes.
Revolution of the earth around the sun is a fast change.
Observe the following pictures. Write S for a slow change and F for a fast change.
Give some examples of fast and slow changes that occur in your surroundings.
Changes that may take place on mixing two substances are always reversible.
Differentiate between physical and chemical changes with the help of examples.
