Answer the following questions in one word. Is change of state a physical or a chemical change.
Answers
Answer:
Physical Change
Chemical Change
The chemical composition of a substance does not change
The chemical composition of a substance does not remain same
Easily reversible
Not easily reversible
No new substance is formed
New substances are always formed
Melting of ice is an example of physical change
Burning of paper is an example of chemical change
b.
Periodic changes
Non periodic changes
1. Events that repeat themselves after a fixed period of time and whose ocurence can be predicted are called periodic changes.
The events that do not repeat themselves after 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.
c.
Natural changes
Man made changes
1. The changes which are brought about by nature itselfand 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 sea, ageing of plants etc.
Explanation:
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Answer:
physical change
Explanation:
because change of state I didn't take any chemical change