Their buildings represent physical changes of the building materials.
Solid, liquid and gas.
matter
yes
Glass is not a change of any sort. It is a mixture of substances that can undergo both physical and chemical changes
A "chemical" change takes place when an acid dissolves soft rock. A "physical change" occurs when a rock is crushed into powder.
Yes silicon can undergo physical and chemical changes.
no
All substances have physical changes.
None ------ Yes, can be melted.
Solid, liquid and gas.
Yes.
matter
yes
Hg is not a change, it is an element. It can undergo changes, both physical and chemical.
No.
Copper sulfate is a substance, not a change. It can undergo physical and chemical changes.
Water is not a change of any sort. It is a substance. It can undergo physical and chemical changes.