chemicals change you can got every thing from google book .
and chemical,s reaction , chemical compuand and also the water , hydrogen . clik this and got chemical google book , clik this link http://books.google.com.pk/books?id=IV4Cc1XFK4QC&pg=PT15&lpg=PT15&dq=chemical+change&source=bl&ots=BKr2FCAzow&sig=N_JRLdWvzLb90AmudKYupBA7czA&hl=en&ei=GxNDSveaMZD6kAWLs-WcDw&sa=X&oi=book_result&ct=result&resnum=9
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