Physical... The ice cream could eventually be returned to it's original form. Good question though, and remember that chemical changes are between two elements. Good luck (:
Filtering air to remove dust and pollen is a physical change because the process does not alter the chemical composition of the dust and pollen particles. It simply separates them from the air through physical means, such as using a filter.
Chemical change
Yes, when bleach spills on a shirt and causes the fabric to change color or degrade, it is considered a chemical change. Chemical changes involve a rearrangement of atoms and the formation of new substances.
Using a Bunsen burner to heat copper is a physical change. The copper undergoes a change in its physical state from solid to liquid without changing its chemical composition.
Melting a nail is a physical change because only the state of matter is being altered, from solid to liquid, without changing the chemical composition of the nail. The nail can solidify again by cooling, showing that the change is reversible.
Chemical change
Chemical change
It is a physical change, as the chemical integrity remains the same.
No, it is a chemical change.
Filtering air to remove dust and pollen is a physical change because the process does not alter the chemical composition of the dust and pollen particles. It simply separates them from the air through physical means, such as using a filter.
It is a physical reaction. Melting is a physical change because it does not change the chemical composition of the substance.
Chemical change
No. It is a physical change.
Physical change is preferable because it is easier than chemical method.
A chemical change. If the identity of of the chemicals involved change in identity, it is a chemical change.
Yes, when bleach spills on a shirt and causes the fabric to change color or degrade, it is considered a chemical change. Chemical changes involve a rearrangement of atoms and the formation of new substances.
Using a Bunsen burner to heat copper is a physical change. The copper undergoes a change in its physical state from solid to liquid without changing its chemical composition.