TRUE OR FALSE? is it a physical or chemical change?

Yes, a chemical change cannot be observed without changing the material. Such as turning apples to oranges vs cutting apples. Obviously if the apples turn to oranges, they aren't apples anymore. But if you just simply cut it, that's still an apple.

Chemical

It's a chemical change. Think about it, when you bake a cake it's a chemical change b/c when you take it out of the oven you cannot get it back to it's original state therefore it has changed the material itself.

it is true... think about it this way: a physical change would be like the color, which is observed. A chemical change would be like the mineral composition...

i dont really get what u mean......but i think physical change is like water-steam-water-ice and chemical was somethin like iron-copper (or something) i cant come up with a good one for that but chemical change changes the whole thing, not just appearance but chemical makeup too

It's true...a chemical change creates a new substance which is observable.

Chemical Change Can't be observed Without changing the material I'm struggling to make sense of this. False: it can be observed without changing the material. Iron (grey metal) changes to iron oxide (red, non metal). Can we observe the change? Yes, easily. Did the act of observing change the material (rust)? No, obviously not. Unless this is a translation of a foreign language whomever wrote this needs some serious English lessons. Chemical change is about material change, but so is a physical change. A material is composed of one or more chemicals. Melting ice is a physical change that changes the material (from solid to liquid) but is not considered a chemical change. If you analyze the question posed there is no mention of "Physical Change", so I do not understand why you write about it, especially if it is a true or false question. A "tautology" is some statements which have to be true. Breaking down the question .."change can't be observed without change" - the answer seems pretty obvious doesn't it? But if the question is: Can a chemical change occur WITHOUT visibly changing the material, the answer is yes. I can make a chemical change without observable change. For instance I can bombard a polymer with radiation and break the polymer chains. This happens in airplanes and makes the plastic composites weaker, and it is very hard to find, hard to observe.