Classify the changes as physical or chemical changes (3)
(a) Evaporation of water
(b) Formation of acid rain
(c) Growth of a plant
Answers
Answer:
a) physical change
b) chemical change
c) chemical change
Answer:
1. evaporation of water - physical change
2. formation of acid rain - chemical change
3. growth of plant - chemical change
Step-by-step explanation:
1. The evaporation of water is a physical change. When water evaporates, it changes from the liquid state to the gas state, but it is still water; it has not changed into any other substance.
2.Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.
3. growth of plant is a chemical change because it involves photosynthesis reaction , and many others reactions too.
hope this helps you
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