Question

Describe the following changes in the basis of different criteria. A tree falling in a storm
Sharpening a knife's blade

Answer 1

Answer:

Both are physical changes

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Answer 2

Answer:

A tree falling in a storm is a physical change. sharpening a knife's blade is a chemical change.

Explanation:

It is a physical change as if a tree is in a storm and falls then no one is making him fall. It has been fall due to the act of God. A storm is not in our control, it has occurred naturally so it is a physical change.

it's a chemical change as we r sharpening the knife it is not happening on its own and to sharpen it we have to rub it with a hard surface. so it's a chemical change.

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