It is a chemical change because the temperature changes, light is emitted, and there is a change in smell or taste. 3 signs of a chemical change.
Burning gasoline is a chemical change, not a physical change. When gasoline burns, it undergoes a chemical reaction to produce heat, light, and other products like carbon dioxide and water vapor. This change is not easily reversible and involves the breaking and forming of chemical bonds.
Yes, early humans did use wood to make tools. They would shape the wood by carving, cutting, and smoothing it to create functional tools for various purposes such as hunting, cooking, and building. Wood tools were essential for their survival and daily activities.
Wood primarily contains cellulose, lignin, hemicellulose, and extractives. Cellulose gives wood its structure and strength, while lignin provides rigidity and resistance to decay. Hemicellulose acts as a bonding material between cellulose fibers, and extractives are non-structural compounds that can vary in content depending on the wood species.
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Homo erectus primarily used stone, wood, and bones to make tools. They crafted handaxes, cleavers, and other tools by striking rocks together to create sharp edges for cutting and processing food. Wood and bone were also used for making pointed tools, such as spears.
A physical change because the chemical composition of the wood does not change.
Burning gasoline is a chemical change, not a physical change. When gasoline burns, it undergoes a chemical reaction to produce heat, light, and other products like carbon dioxide and water vapor. This change is not easily reversible and involves the breaking and forming of chemical bonds.
Cutting a piece of wood is a physical change because the chemical composition of the wood remains the same before and after cutting. The change is only in the physical appearance and shape of the wood.
Wood is a material. It is not a change.
Chemical change
Chemical change
Physical.
Yes,Decaying Of Wood Is Chemical Change. Answered By Warfa
Its a physical change
Physical. If you were to cut that piece of wood in half what would it be? Still wood. There would be no chemical change. Just a physical change.
I guess it could be chemical, but really- it's a physical change
Rottening of wood is a chemical (breakdown) reaction