(24 August) Science P.5 : Review of substances and changes

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1. What is physical change? *

It involves a formation of a new subatance through a chemical change .

It only involves a transformation in a physical properties of a subatance.

2. What is chemical change? *

It involves a formation of a new subatance through a chemical change .

It only involves a transformation in a physical properties of a subatance.

3. What is reversible change? *

The substance cannot change back to its original form.

It is when the substance can change back to its original form.

4. What is irreversible change? *

It is when the substance can change back to its original form.

The substance cannot change back to its original form.

5.Give an example of a chemical change. จงยกตัวอย่างการเปลี่ยนแปลงทางเคมี 1 ตัวอย่าง ตอบเป็นภาษาอังกฤษ *

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