Chemical Change
Contents
Key Stage 3
Meaning
A chemical change is a change that results in new chemicals being formed.
About Chemical Changes
- Chemical changes are usually irreversible. However, some can be reversed.
- Chemical changes produce new chemicals which have different physical and chemical properties from the reactants.
Examples
- Cooking food involves several chemical changes. Baking a cake and toasting bread causes chemical reactions that are used to change the texture and flavour of the food.
Key Stage 4
Meaning
A chemical change is a change that results in new chemicals being formed.
About Chemical Changes
- Chemical changes are usually irreversible. However, some can be reversed.
- Chemical changes produce new chemicals which have different physical and chemical properties from the reactants.
- In a chemical change the atoms in molecules are rearranged to form new molecules.