Table 1: Observations of Physical and Chemical Changes
Identification and
description of starting
materials used
Manipulation or activity
performed
Observations of products
White , Index card made
of paper
-Weigh card
-tear card into 4 pieces
-Weigh all four pieces
One card has been divided
into 4 pieces
No change in color
No change in mass
-Weigh card
-Burn the paper for 10
seconds
-Weigh any remaining
solid material
Flames and smoke as
paper burns
White index card made of
paper
Color change – remaining
solid material is black
Some of paper was
converted into gases as
the paper burned
Classification of change
(Physical or Chemical?)
Physical
Chemical
Justification
The products are just smaller pieces
of paper; there was no chemical
change
The products were gases (carbon
dioxide and water) that were
produced when the paper was
chemically changed during the
combustion reaction; some solid
remained but it had a different color
than the starting material
Table 1: Observations of Physical and Chemical Changes (continued)
Identification and
description of starting
materials used
Manipulation or activity
performed
Observations of products
Classification of change
(Physical or Chemical?)
Justification