They aren't; a change of state is a physical change
Snow disappearing is a physical change. It is a combination of melting and then evaporating and of sublimation.
Density is classified as a physical property because the density of a substance can change when the substance changes state. Example: When water evaporates it is a physical change and the density changes. A chemical property is a property that describes its ability to react chemically with other substances and THEREFORE density is not a chemical property.
Yes. Liquid or solid changes to a gas physically.
Yes, matter can change states after a physical change. Physical changes involve changes in the arrangement of particles without altering the chemical composition. For example, melting ice (solid to liquid) and boiling water (liquid to gas) are physical changes that involve changes in state.
State changes are physical changes because they involve a change in the physical properties of a substance, such as its form or state of matter (solid, liquid, gas). No new substances are formed during a state change, making it a physical change rather than a chemical change.
physical. melting does not change the substance; it only changes the state of matter (or the movement of particles).
They aren't; a change of state is a physical change
no physical change does not change matter
Snow disappearing is a physical change. It is a combination of melting and then evaporating and of sublimation.
Density is classified as a physical property because the density of a substance can change when the substance changes state. Example: When water evaporates it is a physical change and the density changes. A chemical property is a property that describes its ability to react chemically with other substances and THEREFORE density is not a chemical property.
It is a physical change, because it does not change in substance. A penny, whether in its normal state or flattened, is still a penny. Similarly, if you drop a watermelon and it breaks apart, that is also considered to be a physical change because it is still a watermelon. Things are considered to be chemical changes when the substance changes into something new, and is commonly classified as irreversible. When an object rusts, it is considered to be a chemical change. Chemical changes are associated with a temperature change, or a color change or bubbling or something of the sort. Physical changes deal with physical changes in state, for example, ice melting, or in the example you provided, a penny being flattened.
Physical ... it's only a state change. Cool it and it reverts to its old condition.
It affects it state.
Yes, changes in state of matter involve physical changes because the substance retains its chemical composition. The change is simply a rearrangement of particles due to differences in energy levels or intermolecular forces, rather than a chemical reaction.
The kinds of changes in substances that are always physical changes are changes in the state. This is the change from solid, to liquid and then to gas and the reverse.
No, changes of state such as this are physical changes.