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प्रश्न
Distinguish between the following.
Periodic change and non-periodic change
उत्तर
| Periodic changes | Non periodic changes | |
| 1. | Events that repeat themselves after a fixed period of time and whose occurrence can be predicted are called periodic changes. | The events that do not repeat themselves after a regular interval of time are called non-periodic changes. |
| 2. | Example: rotation of earth, revolution of earth, day and night, seasons, etc. | Example: natural disasters like earthquake, cyclones, etc. |
संबंधित प्रश्न
What do you observe when :
a piece of paper is burnt
Tick (√) the correct alternative from the choice given for the following statement
When sugar is heated, its colour changes into
True or false?
During a physical change energy is either given out or absorbed by the system.
Melting of solid (wax) is a physical change.
Under which different types can the following changes be classified?
Conversion of milk into yogurt.
Under which different types can the following changes be classified?
Occurrence of an earthquake.
Picture based question
Observe the picture and list down the changes that are accompanied in the picture.
- ______.
- ______.
- ______.
Observe the picture containing a kettle and note that it has salt water in it and answer the following questions:
- What is name of the process that is done to the kettle?
- What will happen to the content of the kettle?
- What kind of change is occurring on the cold surface of the metal plate?
- What can you say about the quality of water that is obtained in the beaker?
What is the change?
Cut vegetables turn brown when exposed to air, this is due to ______.
