1. Describe two changes that are harmful. Explain why you consider them harmful. How can you prevent them?
Answer:
Two changes which are harmful are:
(ii) Deforestation (physical change): When a tree is cut for wood, only the size and shape of the substance changes. Therefore, deforestation by excessive cutting of trees for wood is a physical change. Deforestation has many harmful effects such as climate change, global warming, soil erosion, wildlife extinction.
“Describe two changes that are harmful. Explain why you consider them harmful. How can you prevent them?” – Solved
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Solution to Activity 5.2
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Solution to Activity 5.4
Solution to Activity 5.5
Solution to Activity 5.6
Solution to Activity 5.7
Solution to Activity 5.8
Solutions to Chapter 5 Physical and Chemical Changes
