It is a physical change because the chemical composition of the glass does not change.
When a red blood cell is placed in distilled water it will swell and burst. This is a physical change.
This is a chemical change.
It does but it is Not a chemical change its physical change...
Physical. The glass expands or contracts depending on temperature, when you put a hot glass into cold water part of the glass cools and contracts while some of it is still in it's hot, expanded state.
When ice melts and becomes a liquid it is a physical change. When the liquid boils and becomes gaseous it is a physical change. It is a chemical change when the molecular structure has been changed in some way, here it has not.
When a red blood cell is placed in distilled water it will swell and burst. This is a physical change.
it is a physical change because the state of the glass does not change.it cracks because of the rapid change of temperature
This is a chemical change.
It does but it is Not a chemical change its physical change...
Chemical
It is a Chemical change
Physical. The glass expands or contracts depending on temperature, when you put a hot glass into cold water part of the glass cools and contracts while some of it is still in it's hot, expanded state.
Exploding of potassium metal when placed in water
When ice melts and becomes a liquid it is a physical change. When the liquid boils and becomes gaseous it is a physical change. It is a chemical change when the molecular structure has been changed in some way, here it has not.
It is physical because the object doesn't chemical change . the object just pushes upward in water of liquid and gas( air) on an object placed in it.
It is physical because the object doesn't chemical change . the object just pushes upward in water of liquid and gas( air) on an object placed in it.
Sharpening a pencil is a physical change, because there is no change to the chemical makeup of the pencil when sharpening it. It is simply chunks of wood being sliced off to reveal more of the lead.It is a physical change.