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Because burnning wood is using energy but breaking is using forces.

When wood burns, it's not wood any more. It turns into smoke, ash, and (maybe) charcoal.

When you break wood, it's still wood.

When you change something into a different substance, that's a chemical change.

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11y ago

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Is burning a match a physical change?

Yes, burning a match is considered a chemical change because it involves a chemical reaction that changes the composition of the matchstick and produces new substances like ash, carbon dioxide, and water vapor. This is different from physical changes, which do not alter the chemical composition of a substance.


Which of the following forms a new substance melting freezing evaporating burning?

Burning chemically alters a substance, creating different / new substances as a result. Melting, freezing, and evaporating are all different phases of the same substance.


Is a wax burning a reversible change?

No, burning wax is an irreversible change. When wax is burned, it undergoes a chemical reaction that changes it into different substances (carbon dioxide, water vapor, and heat) that cannot be easily reversed.


What are the steps to prove that a burning of a candle is physical as well as a chemical change?

To prove that the burning of a candle is a physical and chemical change, you can observe the physical changes such as the melting of the wax and the formation of soot. Additionally, you can analyze the chemical changes by noting the production of carbon dioxide and water vapor during the combustion process. By observing both physical and chemical changes, you can demonstrate that burning a candle involves both types of transformations.


Can burning a candle be reversible?

No, burning a candle is not reversible. When a candle is burned, the wax is melted and the wick is consumed, resulting in irreversible changes to the candle's structure.

Related Questions

How is burning sugar different from other chemical changes?

Why is it different? No, it isn't. Burning sugar is a combustion process.


Is irreversible changes the same as incomplete burning?

No, they are different processes.


Is burning a match a physical change?

Yes, burning a match is considered a chemical change because it involves a chemical reaction that changes the composition of the matchstick and produces new substances like ash, carbon dioxide, and water vapor. This is different from physical changes, which do not alter the chemical composition of a substance.


Why is burning of gas considered a chemical change?

All burning reactions involve chemical reactions (chemical changes).


What changes in a physical changes?

Burning


What changes considered as oxidation reduction reaction burning of magnesium ribbon or electrolysis of water?

both reactions are redox reactions


Which of the following forms a new substance melting freezing evaporating burning?

Burning chemically alters a substance, creating different / new substances as a result. Melting, freezing, and evaporating are all different phases of the same substance.


What are the physical changes of a plastic bottle?

Yes, burning (oxidation) is chemical change.


What is the important of chemical changes?

A chemical change is when some thing changes into another energy or substance. It is important to make different things. A example is a piece of wood burning offers heat and light.


What human activities might explain changes in carbon dioxide levels in the air we breathe?

- Burning of fossil fuels (or derivatives) in thermal power plants, in buildings, autovehicles, forest fires, etc.


Why is a burning candel a chemical change and not a physical changes?

Burning is a chemical reaction with oxygen (oxidation).


Is burning wood a revisible change?

I know for sure that it is not, however I'm not quite sure why. Hopefully someone else can explain this.