no, its physical change :)
A metal Surface being ground is a physical change, not a chemical change.
It is a chemical change. Oxygen in the air (and sometimes water vapor) combines with the iron to form oxides. The rust is a new chemical with very different properties: it has little strength, can be washed away, and is no longer attracted to a magnet.
Being resistant to corrosion is a physical property of a material, not a physical or chemical change. It means that the material does not undergo chemical reactions with its environment that would cause it to deteriorate over time.
washing clothes is a chemical change because the dirt and stains dissolve in the solution that the clothes are being washed in
Heating KClO3 and MnO2 to form KCl and MnO2 is a chemical change as new substances are being produced.
chemical change
It doesn't. This is actually an issue for many beaches: their sand is constantly being washed away, and needs to be replenished to maintain the beach. Naturally sandy beaches either have low tidal action, or new sand is constantly being formed at a rate fast enough to replenish that which is washed away.
A metal Surface being ground is a physical change, not a chemical change.
physical. the water being added simply soaks through the coffee, so there's no chemical change.
It is a chemical change. Oxygen in the air (and sometimes water vapor) combines with the iron to form oxides. The rust is a new chemical with very different properties: it has little strength, can be washed away, and is no longer attracted to a magnet.
Gasoline being poured into a tank is not a chemical change.
Being resistant to corrosion is a physical property of a material, not a physical or chemical change. It means that the material does not undergo chemical reactions with its environment that would cause it to deteriorate over time.
burning of tree or wood is an irreversible chemical change
It would be both. It's a physical change because it is changing state and a chemical change because water is being evaporated.
A chemical change can not be reversed. Obviously the fire work can not be put back together because it has reacted, not being able to be reversed, and therefore, being classified as a chemical change.
Remember that a chemical change is anything that alters the identity or composition of a substance. So something such as color change, a solid being formed, a gas being produced or temperature changing would constitute a chemical change.
chemical change