Simplify the following text for a Grade 8 native English-speaking person.
Original: Chemical Change : During chemical change , substances are changed into different substances .
Simplified: A chemical change ( chemical reaction ) is a change of materials into other , new materials with different properties , and one or more new substances are formed . Burning of wood is a chemical change as new substances which can not be changed back ( e.g. carbon dioxide , water vapor ) are formed .