If a substance is chemically changed this is a chemical reaction, a chemical process.
A test variable is the item that has changed physically and chemically.
no, it cannot be changed back.
Ash and smoke.
Yes, chemical reactions
it is changed to a clay form
If matter expands, it is typically considered a physical change. It did not change chemically. It merely changed in size.
The chemical composition was changed during frying.
This is a mixture.
Vinegar softens the meat and also adds flavor. The high acid content will chemically "cook" the meat a bit, too.
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A mixture (it's in the book )
it may be a catalyst, a spectator ion a solvent.
Chemically changed and can be physically separated into different species.
its a type of penicillin that is pure and has never been chemically changed
they disolve :)
The chemical change of matter is what happens when you have something changed chemically
These substances are called catalysts.
Yes, it is a physical change. Nothing chemically changed about the balloon.
mechanical weathering is not changed chemically.
Metamorphism occurs and they change to metamorphic rocks
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