a) Fast changes occur with in seconds or minutes. Whereas slow changes take place very slowly and may take hours, days or months to complete. Examples for fast changes: Burning of paper, Burning of a candle. Examples for slow changes: Rusting of iron, Germination of seed, curdling of milk etc.
What is the example of fast change?
Fast change The changes that occur within a short time frame are considered fast changes. Examples: Crackers burst, blowing of balloons and burning of papers.
Which one of the following is a fast change?
Answer: A change that takes place very quickly is called fast changes. Bursting of a fire cracker, lighting a matchstick, etc. are some examples of fast change.
What is fast change and slow change examples?
The changes that take a long duration of time to complete, are called slow changes. This duration can be in hours, days or even months. The changes that are completed in short or very short duration of time are called fast changes. Examples of slow changes: Rusting of iron, as it takes many days.
What are slow changes give 2 examples?
Formation of rust takes longer time and is not an immediate reaction. Therefore, rusting of iron is an example of slow change where new substance, iron oxide is formed. 2. Another example of slow change is rotation of earth, which causes day to night.
What are the examples of undesirable changes?
Undesirable change: The changes which are not desired to change is called undesirable changes. Ex: Earthquakes, hurrcanes, tsuanmi , rusting of iron, souring of milk, rottening of fruits etc. Hope this helped!Nov 3, 2017.
What is reversible change with example?
A reversible change is a chemical change where no new materials are created and the original materialcan be recovered. Examples include freezing water to make ice or melting chocolate.
What are the examples of natural changes?
Examples of natural changes are growth in man and seasonal changes and examples of man-made changes are burning of fuels and chemical reactions.
Are any changes happening in our body?
Internal changes Some of the common changes would be: Decreased functioning of internal organs like kidneys and liver. Body muscle mass decreases. Bone density and viscera reduces and bones become more porous.
What are the examples of man-made changes?
Natural changes Man-made changes 2. Examples- changes of season, tides in the sea, aging of plants, etc. Examples- burning of fuels, cutting hair, switching on lights, etc.
What is meant by slow changes?
The changes which take place in a long period of time are called slow changes whereas, the changes which take place in a short period of time are called fast changes. Examples: (a) Rusting of iron, ripening of fruits, growing of trees are slow changes.
What is meant by fast change?
Fast changes are the changes that happens in matter of seconds or few minutes, which may be or may not be seen by us as they happen that quickly, here are some examples- •Burning of paper. •Burning of candle. •Earthquakes.
Which is reversible change?
A reversible change is a change that can be undone or reversed. If you can get back the substances you started the reaction with, that’s a reversible reaction. Examples of reversible reactions include dissolving, evaporation, melting and freezing.
What are natural changes?
Natural changes are the changes which happen mainly due to the natural factors with humans having no control over it. Some of the examples of natural changes are. Volcanoes – Volcanoes are yet another example of natural changes.
What is periodic change with example?
Periodic changes are changes which occur periodically or at regular intervals Example: Change of seasons. Day and night, changing phases of the moon, beating of heart, clock striking an hour are all examples of periodic motion whereas waterbecoming ice, burning of matchstick etc are non periodic changes.
What is meant by slow and fast motion Class 7?
The slow motion means the movement of object /body with respective to its surrounding but with a relative slower speed. The fast motion means the movement of object /body with respective to its surroungind but with relative greater speed.
Which is undesirable natural change?
Undesirable Changes- Changes brought about by nature or man which produces useless or bad results. E.g.- Rain causing destruction by floods. Milk turning sour on a hot day. Rotting of fruits, cutting of trees.
What is the example of undesirable?
For example : ripening of fruits , germination of seeds , change in season etc. Non desirable or Undesirable changes are those changes which we do not want to take place. For example : rusting of iron, souring of milk, rottening of fruits and vegetables , global warming etc.
What is a undesirable change?
Changes brought about by a person or by nature which are harmful are known as undesirable or nonagreeable changes. Examples: Rain causing destruction by floods, souring of milk.
What are the three examples of reversible change?
Examples of reversible changes are: Melting of ice. Boiling of water. Melting of wax. Stretching of a rubber band. Stretching of a spring. Inflation of a ballon. Ironing of clothes. Folding of paper.
Which things Cannot be reversed?
Answer: A change which cannot be reversed is called irreversible change. Setting of cement is an example of a irreversible change. Absorption of water by a sponge is an example of a reversible change. Cooking of food represents irreversible change. Digestion of food is a chemical change.
Is boiling a reversible change?
Processes such as melting, boiling, evaporation, freezing, condensation, dissolution are reversible changes. Few examples are melting of wax, freezing of ice, boiling water which evaporates as steam and condenses back to water.
What is the difference between natural and human made changes?
Natural Change and Man-made Change – General Science | Shaalaa.com.Solution. Natural changes Man-made changes 1. The changes which are brought about by nature itself and are not under the control of humans are called natural changes. The changes which are brought about by humans are called man-made changes.
What are permanent changes?
Permanent changes are the one which cannot be reversed again if the form is once changes. Here are the few top examples of such changes; • Burnt woods which cannot be converted to wood again. • Burnt coal burnt will give out ashes. • Burnt bread can never be undone.
What are the different forms of changes?
Different Types of Change Happened Change. This kind of change is unpredictable in nature and is usually takes place due to the impact of the external factors. Reactive Change. Anticipatory Change. Planned Change. Incremental Change. Operational Change. Strategic Change. Directional Change.