Tearing an aluminum foil is a physical change. This will only alter the physical features of the foil and not have any effect on the chemical composition.
Because a physical change is a change in shape, size, color, or just any thing to do with appearance or measurements.
Malleable, brittle, ductile
Iron rusting = chemical gasoline burning = chemical cutting a piece of wood = physical aluminum reacting with foil paper= chemical Anytime the basic molecule is changed, it is chemical, and if it is not than it is physical. Keep in mind that basic state changes (e.g. melting from solid to liquid) are physical.
yes
You wrap the piece of bread in a piece of foil. You can also leave a mirror a few feet away if the reflection is on the foil! I'm not sure how long that would take though!
It is malleable.
Physical. It's still aluminum foil.
Physical. It's still aluminum foil.
Physical. It's still aluminum foil.
· Absorption of water into a towel · Crumpling a piece of paper · Pulling copper into a thin wire - a change of shape, but not a change of composition · Cutting a material such as wood · Tearing a piece of tin foil
A piece of aluminum foil has a fixed mass and volume, it is flexible, and it is a metal that can conduct electricity.
Malleable, brittle, ductile
It is a physical change because it can be reversed. All you have to do is weld the foil back together!
Foil cut into pieces represents a physical change.
It's a chemical change. The aluminum foil is rusting, which cannot be undone, meaning that this is a chemical change, not a physical. Physical changes can be reversed.
Crushing.
it's a physical change.
physical change, because you are changing the physical property of the object. you are causing the change by hammering it. If you were to put some kind of chemical on it and it changed the physical property of the object that would be a chemical change.