Yes, physical changes involve a small change in energy.
yes all changes involve exchange in energy
Indeed it does!
What changes and what remains the same during a physical change
Chemical bonds always break in chemical reactions, causing changes in energy.
Chemical bonds always break in chemical reactions, causing changes in energy.
Physical Change-- Same amount of energy, but in different form Chemical Change-- Different amount of energy, and in a different form
Physical change. It is still wax, and can be uncarved by being melted and recast. Chemical changes cannot be undone without applying energy.
During a physical change, the matter of what the substance is made out of doesn't change.
Physical changes are generally easy to reverse because NO ENERGY is produced by the substance.A Chemical change cannot be reversed because ENERGY is produced by the substance forming a new substance.
no
did the composition change
A PHYSICAL CHANGE MEANS CHANGE IN EXTERNAL APPEARANCE .A CHEMICAL CHANGE MEANS THE CHANGE IN THE PARTICLES BY WHICH IT IS MADE up OF.Physical Changes are d changes which are reversible .In this change we can get the products back. eg-Mixing of water and salt ,we can get salt back .Chemical changes are d changes which are irreversible . In this change we cannot get the products back . eg- Burning of candle , we cannot get the matchstick back after burning .