有冇人可以話我知咩係physical change 同chemical change???

physical change 係指物質只在形態上作出改變
(it only changes the state of matter)
如:水 變 冰

chemical change係指有新既物質會產生
( new matter will be formed)
如: C+O2-->CO2 新既物質(二氧化碳產生左)(Carbon dioxde is formed)