Periodic and Non Periodic Changes

Q. Change of seasons is a:

1. chemical change

2. man-made change

3. fast change

4. periodic change

Q.

The given figure shows the rotation and revolution of the earth on its axis and around the sun respectively.

What kind of change does the earth undergo?

1. Fast change

2. Chemical change

3. Periodic change

4. Man-made change

Q. Changes that repeat after a definite interval of time are called _____________.

1. non-desirable changes
2. desirable changes
3. periodic changes
4. non-periodic changes

Q. Changes which repeat after regular interval of time are called ________.

1. physical changes
2. chemical changes
3. periodic changes
4. non-periodic changes

Q.

7. Formation of day and night is a periodic change. Explain it.

Q. Cyclone and meteor shower are examples of ___________ respectively.

1. desirable and non-periodic changes
2. non-desirable and periodic changes
3. desirable and periodic changes
4. non-desirable and non-periodic changes

Q.

Question 4.

(i) What are periodic changes? Explain with examples.

(ii) Is a forest fire a periodic or a non-periodic change?

Q.

Differentiate between periodic and non-periodic changes.

Q. Cyclone and meteor shower are examples of ___________ respectively.

1. desirable and non-periodic changes
2. non-desirable and periodic changes
3. desirable and periodic changes
4. non-desirable and non-periodic changes

Q. Forest fire is a __________ change.

1. reversible
2. periodic
3. non-periodic
4. temporary

Q. Some changes occur again and again after a definite interval of time. Such changes are called:

1. slow changes
2. non-periodic changes
3. fast changes
4. periodic changes

Q. Nita brings some small fish to her house. She would like to preserve them for 6-7 months and taste different recipes cooked by it. What method would you suggest her to preserve the fish?

1. Irradiation
2. Spray drying
3. Vacuum drying
4. Freeze drying

Q. Some changes occur again and again after a definite interval of time. Such changes are called:

1. non-periodic changes
2. slow changes
3. periodic changes
4. fast changes

Q. Which among the following is an irreversible change?

1. Melting
2. Rusting
3. Freezing
4. Boiling

Q.

Comment on the following.

1. Periodic changes.

2. Non-periodic changes.