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This is not a chemical change.
both
yes
When water changes state from a liquid to a solid, it is undergoing a physical change. The chemical structure of water is not altered, so no chemical changes have occurred.
mechanical nuclear chemical physical
This is not a chemical change.
Smoking is a chemical process.
both
yes
Corroding a substance would be a chemical change because it alters the composition of the material being corroded.
No no no no no
When water changes state from a liquid to a solid, it is undergoing a physical change. The chemical structure of water is not altered, so no chemical changes have occurred.
yes
mechanical nuclear chemical physical
By bending it
pipe cleaner
Originally a pipe cleaner's purpose is to clean tobacco residues in a fife. Though often pipe cleaners are use for handcrafting especially in Kindergarten. A more specific definition can you find in the following Wikipedia Article