What is a chemical change?
Q: What is a chemical change?
A: A chemical change (chemical reaction) is a change of materials into other materials with different properties. It occurs when a substance combines with another to form a new substance, or undergoes chemical decomposition into two or more different substances.
Q: What are some examples of chemical changes?
A: Burning of wood, burning of a candle, rusting of iron, baking a cake are all examples of chemical changes.
Q: What are chemical properties?
A: Chemical properties are special details that describe how a chemical change takes place.
Q: What is the opposite of a chemical change?
A: The opposite of a chemical change is physical change. Physical changes are when no new substances are formed and the substance which is changed remains the same.
Q: What are some examples of physical changes?
A: Examples include changing shape, changing states, passing electricity through copper wire, breaking wood, shattering glass and pouring water. These processes do not result in any new substances being formed.
Q: What are physical properties? A: Physical properties are special details which do not change in a substance without new substances being formed.
