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Undesirable change: Those changes which we do not want to take place are called undesirable changes. Examples: rusting of iron, souring of milk, rottening of fruits etc.
What is called desirable changes?
Changes which are desired to occur (i.e. we want them to take place) are known as desirable changes. These changes produce good results. Examples: Rain bringing water to the crops results in germination of seeds, change of milk to curd, ripening of fruits, growth of a seedling into a plant.
Which of the following is desirable change?
Desirable changes are those that are beneficial[useful]. Milk changing into curd,a seed germinating and forming a new plant and bees changing nectar into honey are some examples of desirable change. Undesirable changes are those that are not.
What are natural and manmade changes?
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. 2. Examples- change of season, tides in the sea, aging of plants, etc.
What is fast change?
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. Some of the fast changes are spontaneous, meaning that they occur in a second or even less amount of time.
Which is not a desirable change?
Undesirable change: Those changes which we do not want to take place are called undesirable changes. Examples: rusting of iron, souring of milk, rottening of fruits etc.
What are the examples of desirable?
A great job that everyone wants is an example of something that would be described as a desirable job. Worth having or seeking, as by being useful, advantageous, or pleasing. A desirable job in the film industry; a home computer with many desirable features. Arousing desire, especially sexual desire.
What is difference between desirable and undesirable changes?
Desirable Changes: Those changes which are desired to occur that is, we want them to take place are known as desirable changes. Examples: ripening of fruits, germination of seeds etc. Undesirable change: Those changes which we do not want to take place are called undesirable changes.
Are chemical changes desirable?
Physical and Chemical Changes | Exercise Changes that take place naturally or artificially and produce useful and required results are desirable changes. Changes that take place naturally or artificially and produce not useful or bad results are undesirable changes.
What are the permanent changes?
– Permanent changes are also called chemical changes. – In a chemical change or a chemical reaction, the substances which undergo reaction are called reactants or starting material and the new substances produced with different properties are called products.
What are reversible changes give three examples?
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.
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 a desirable quality?
: having good or pleasing qualities : worth having or getting. : sexually attractive.
Which one is a natural change?
Natural changes are the effects that happen majorly because there is no control over living creatures due to natural factors. A few of the examples of changes in nature are. Natural calamities – Natural calamities that are beyond anyone’s control may be another major instance of natural change.
What represents a chemical change?
A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust. A chemical change is different from a physical change, which doesn’t rearrange atoms or molecules and produce a completely new substance.
What are 4 examples of physical change?
Examples of Physical Changes Crushing a can. Melting an ice cube. Boiling water. Mixing sand and water. Breaking a glass. Dissolving sugar and water. Shredding paper. Chopping wood.
What is desirable change give example?
Desirable changes are the one which are brought about by nature and results produced by these changes are good results or useful results. Example: rain bringing water to the crops, milk changing into curd, ripening of seedlings of fruits into a plant.
What is the another name of reversible change?
What is another word for reversible? changeable variable changing mobile movable protean unfixed floating kaleidoscopic turbulent.
Are all physical changes reversible?
Physical changes can further be classified as reversible or irreversible. Physical changes that involve a change of state are all reversible. Other changes of state include vaporization (liquid to gas),freezing (liquid to solid), and condensation (gas to liquid). Dissolving is also a reversible physical change.
What are reversible changes give two examples?
Reversible changes A reversible change might change how a material looks or feels, but it doesn’t create new materials. Examples of reversible reactions include dissolving, evaporation, melting and freezing.
Can a change be both desirable and undesirable?
Hey mate, here is your answer : Yes, there are changes that are of desirable and undesirable. Desirable changes are the changes which are useful to us while undesirable changes ate the change which are harmful to us.
What are some examples of irreversible changes?
Some examples of irreversible changes are burning of paper, Burning of fuels (like Wood, Coal and LPG), Cooking of food, Rusting of iron , Grinding of wheat grains into flour, Baking of chapatti (roti), Growth of a plant, Formation of flower from bud, Falling of leaves from a tree, Ripening of fruits, Ageing of man and Mar 9, 2021
What are the two 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.
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.
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 slow and fast changes examples?
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.
