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any change NOT involving a change in the substances chemical identity- type of matter is still the same

for ex. you cold change the texture, volume, shape, mass, size, weight, color, density, or odor.

More scientifically, it's a change that doesn't involve altering the chemical makeup of an object.

I'll give a few examples.

Take a glass window and break it. Now, instead of one pane of glass, you have many small shards of glass- but they're still glass!

Take water and freeze it. Ice is simply water in a different phase, it's still molecules of h2o, so chemically it is the same.

Take a piece of copper wire and bend it. The physical properties of the wire are now different- it has a bend in it. But it's still copper!

An example of a change that's not physical, but chemical, would be rusting iron. When iron rusts it becomes chemically different, a compound called iron oxide (Fe -> FeO).
Physical change is a change which takes place without any process of mixing of chemicals. It is a process of change in matter by manual method. If matchstick is burnt the burnt part cannot be regained. This is called chemical change.If the paper is crushed it can be regained to its original shape. this is called physical change.
so basically a pyhsical change is any change NOT involving a change in the substances chemical identity- type of matter is still the same

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15y ago

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