Question

Differentiate between the following

1)Natural and artificial change
2)Fast and slow change
3)periodic and non-periodic change
4)Melting and freezing
5)Boiling and evaporation
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Answer 1

Answer:

Explanation:n naturalchanges are changes that occur By Nature where as man made changes or artificial changes are changes that are made made by humans

Fast changes are changes that occur within a second where as slow changes are changes that takes long time to occur

Changes changes that repeats itself after a regular interval of time where as non periodic changes are changes that do not occur at regular intervals

Process by which things freezes is called freezing process by which things melt is called melting

Answer 2

Answer:

NATURAL CHANGES :-

These are changes made by God (God made changes)

Examples of natural changes in the animals

Growth, movement, death, reproducing

Changes in plants

Growth of plants

Germination

Drying plants

Ripening of fruits

Natural changes around us

Floods, drought, earthquakes, land slides, storms, lightning, thunder, hail storms, soil erosion, weather changes, seasonal changes.

MAN- MADE CHANGES :-

Processes in our daily lives are expelling chemicals and foreign substances into the air that affect and increase the natural greenhouse gases, which then absorb more energy from the sun. This results in global warming and changes the climate.

1.Slow change: A change which take place in very long period of time.

For ex. Growing of a child to adult.

2.Fast Change :A change which takes place in very short period of time.

For ex. Burning of paper.

Changes which are repeated after regular intervals are called periodic changes. The occurrence of day and night and even the change of periods in your school are examples of periodic changes. Changes which do not take place periodically, such as freezing of water to form ice, are non-periodic changes.

Freezing :- Gradual change of state from liquid to solid by leaving heat to surroundings is termed as freezing.

The temperature at which a liquid transforms to solid by leaving heat is termed as Freezing Point of the concerned substance.

In freezing, internal energy of the substance decreases.

Examples of freezing—

Water to ice

Liquid wax to solid wax, etc.

Melting:- Gradual change of state from solid to liquid by absorbing heat from surroundings is called melting.

The temperature at which solid transforms to liquid is called Melting Point of the concerned substance.

Internal energy of the substance also increases for melting.

Example of melting—

Ice to water

Solid wax to liquid wax

Melting of iron ore in furnace .

• Evaporation:-

1) Evaporation is the process of conversion of a liquid into vapours at any temperature below its boiling point.

2) In the process of evaporation, bubbles are not formed.

3) It is slower than the process of boiling (Slow process).

4) It occurs at all/any temperature.

5) In the process of evaporation, temperature may change.

6) Energy supplied by the surroundings.

• Boiling:-

1) Boiling is the process by which a liquid turns into a vapour when it is heated to its boiling point.

2) In the process of boiling, bubbles are formed.

3) It is faster than the process of evaporation (Quick process).

4) It occurs at a definite/fixed temperature (boiling point).

5) In the process of boiling, temperature remains constant.

6) Energy supplied by a source of energy.

I am writing a short ans for differentiate between Boiling and evaporation ....

Evaporation:-

Evaporation is the process of conversion of a liquid into vapour at a temperature below its boiling point.

It is a surface phenomenon.

It is a very slow process than boiling.

It occurs at all temperatures.

Boiling:-

Boiling is the process by which a liquid turns into a vapour when it is heated at its boiling point.

It is faster than the process of evaporation.It is a bulk phenomenon

It occurs only at a particular temperature - boiling point.

Thank you