Advertisements
Advertisements
Question
Change is the law of nature and occurs in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Slow and fast change.
Solution
| Slow change | Fast change |
| (i) Changes which occur – very slowly over days, months, or years. | (i) Changes which occur – very rapidly in seconds or minutes. |
| (ii) Examples: Growth of a tree from a seed - a few years, tooth decay, change of seasons, growth of many rusting of iron | (ii) Examples: Occurrence of lightning - a few seconds, burning of paper or match, lighting a bulb, bursting of fireworks. |
APPEARS IN
RELATED QUESTIONS
Photosynthesis cannot take place at night.
State four differences between physical and chemical changes.
Fill in the blank
Revolution of the earth around the sun is a ________ change.
Which of the following are physical changes and which are chemical changes ?
Glowing of an electric bulb
Classify the following as a physical or a chemical change.
Burning of coal
Classify the Following as a Physical Or a Chemical Change.
Making of a Sugar Solution
Fill in the blank.
There is no change in the _____________of the substance during a physical change.
Given reason:
Freezing of water to ice and evaporation of water are physical changes.
Select the chemical changes from the following list of changes
Drying of a fruit
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
