Physical changes
What is physical change?
A physical change alters a substance's form, size, or state but not its fundamental chemical composition.
What is chemical change?
A chemical change transforms a substance into one or more new substances with different chemical properties, involving the breaking and forming of chemical bonds and the rearrangement of atoms.
Shredding wood is an example of ______
Physical change. The wood is altered into a different shape and size, but its still wood in smaller pieces.
Chemical change is _______.
Irreversible
What's another word for physical change?
Reversible
Turning wood into ash is a chemical change. T/F
True, the wood undergo a reaction with oxygen, breaking down and forming entirely new materials like carbon dioxide, water vapor, and mineral oxides, which are ash.
Breaking glass is a physical change. T/F
True.
Burning a marshmallow in a bonfire is a chemical change. T/F
True, the heat causes the marshmallow to melt.
Cooking eggs is a physical change. T/F
False, it is a chemical change because the heat causes the egg's protein to denature and form an irreversible bond.
Crushing cans is a chemical change. T/F
False, it is a physical change.