domingo, 26 de septiembre de 2010

Vocabulary 9

physical change: a change in size, shape, or state, without forming a new substance.
chemical change: a change in matter that produces a new substance wiht different properties from the original.

chemical reaction: a chemical change of  original substances  into one or more new substance.



reactant: one of the original substances beforce a chemical reaction takes place.



product: one of the new substances produced when a chemical reaction takes place.

No hay comentarios:

Publicar un comentario