Distinguish between
Answers
Explanation:
I know physical change but I don't know second question so I am writing your first question so physical change is reversible and chemical change is not reversible
Answer:
1] Physical and Chemical Change-
ANS] Physical Change Chemical Change [ ALL CHEMICAL CHANGES . ARE IN BOLD]
When a substance undergoes a physical change, its composition remains the same despite its molecules being rearranged. When a substance undergoes a chemical change, its molecular composition is changed entirely. Thus, chemical changes involve the formation of new substances.
Physical change is a temporary change. A chemical change is a permanent change.
A Physical change affects only physical properties i.e. shape, size, etc. Chemical change both physical and chemical properties of the substance including its composition
A physical change involves very little to no absorption of energy. During a chemical reaction, absorption and evolution of energy take place.
Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.
Generally, physical changes do not involve the production of energy. Chemical changes usually involve the production of energy (which can be in the form of heat, light, sound, etc.)
In a physical change, no new substance is formed. A chemical change is always accompanied by one or more new substance(s).
Physical change is easily reversible i.e original substance can be recovered.
2]Polar and Tropic Region-
1) Climate is hot and humid in tropical rain forest whereas polar regions are cold.
2) Polar regions are permanently covered with snow whereas tropical rain forest has heavy rain falls.
3) Less vegetation is found in polar areas whereas tropical rainforest have wide variety of vegetation.
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