Chemical and Physical Change
 Learning


objectives
Defines chemical change as the rearrangement of
atoms
Lists examples of the signs of a chemical reaction
A
change where the atoms stay the samedissolving, cutting, molding, mixtures,
change of state
 involves a change in
atoms and a change
in energy
 Describe
the
changes that you
see and might
measure in the
picture
 Change
in
temperature
 Change
taste
in smell or
 Gas
formation
(bubbles of O2,
CO2 or H2)
 Light
 Formation
of solid
(precipitate)
 Change
in colour
 Reactions

can be written in words
Iron + nitric acid  iron nitrite and hydrogen
Or symbols
Fe + HNO3 + H2
* there is a need to memorize some of the common acids*
sulphuric acid, carbonic acid, hydrochloric acid, nitric acid
 Complete

p.20 in your workbook
“Chemical vs Physical Changes”
 Try
your luck at p. 23 and 24 for homework
 Create a foldable shown below: behind the
correct door, define and give four examples
of chemical change and physical change