Physical changes are reversible changes, such as change of state (boiling, melting etc), chemical changes are when something undergoes a reaction changing it's chemical makeup.
A physical change is a change that does not change the chemical makeup of the substance. This can be crushing, tearing, or a phase change for example. A chemical change changes the chemical makeup of the substance. Some examples of this are rusting, combustion, or digestion.
they are both changes and both are matter
What exactly is matter? Matter is anything that has mass and takes up space. There are two main ways of classifying matter. Matter is classified first by its physical state as a solid, liquid, or gas. Secondly, we classify matter by it chemical constitution as an element, a compound, or a mixture. We are going to learn about the differences between atoms, ions, and molecules, the differences between compounds, elements, and mixtures, and the difference between physical and chemical changes.
what involves both chemical and physical change on earths surface
Chemical and physical changes are part of methods applied in science.
Physical changes are melting and boiling in this case; fire is a combustion, a chemical change.
A physical change is a change that does not change the chemical makeup of the substance. This can be crushing, tearing, or a phase change for example. A chemical change changes the chemical makeup of the substance. Some examples of this are rusting, combustion, or digestion.
physical change is when you physically change (your finger grows EG.). chemical is when a chemical in your body is affected (a drug that makes you produce more adrenaline EG.).
in changes. Physical changes can be reversed. E.g. if you were to melt a block of ice, and then freeze it again, it would to some degree be reversed. This is a physical change. However, if you were to burn a peace of toast, the change would be chemical. Once the toast is burnt you cant get it back.
they are both changes and both are matter
the difference between a physical change and a chemical change is that a physical change is usually reversible whilst a chemical change is not reversible.
the difference between a physical change and a chemical change is that a physical change is usually reversible whilst a chemical change is not reversible.
During a chemical change the molecule is transformed; during a physical change the molecule is not transformed.
You can tell the difference by knowing that a physical property changes shape and that a chemical property changes the substance.
There are no physical changes. there are only chemical changes.
A physical change changes the physical properties of an element like color where chemical changes change the chemical properties of an element and usually can't be undone.
A physical change is when a substance changes, but still keeps its identity. When a chemical change occurs, the substance changes its identity.