it is a physical change most of the times because you can get i back into its original form. for ice, or plastic... its physical. but for styrofoam, its a chemical change because you cant get it back.
Then the physical characteristic of a substance change, it is called a change in state. This most commonly occurs when a substance is heated or cooled. The states that substances are solid, liquid and gas. A common example would be water: ice (solid), water (liquid), and steam (gas).
The most important thing for your to remember is that in a physical change the composition of a substance does not change and in a chemical change the composition of a substance does change.
A physical change is when an element undergoes a change while not becoming a whole new element. An example is when metal is flattened therefore changing its physical shape or when water evaporates changing its physical state of matter. A chemical change is when an element becomes a new substance through a chemical reaction. An example would be burning wood or mixing a base and an acid to make water and salt. You can tell when a chemical change has occurred because most commonly the color changes, heat is released, or bubbles come up.
Physical
A solve dissolves when added to a liquid
A solve dissolves when added to a liquid
it is a physical change most of the times because you can get i back into its original form. for ice, or plastic... its physical. but for styrofoam, its a chemical change because you cant get it back.
Then the physical characteristic of a substance change, it is called a change in state. This most commonly occurs when a substance is heated or cooled. The states that substances are solid, liquid and gas. A common example would be water: ice (solid), water (liquid), and steam (gas).
The physical property can be measured and quantified. It includes things like melting point, texture, color... A physical change is when a physical property is altered. The most common example is a change in physical state usually from a temperature change (solid melting to a liquid). A physical change does NOT alter the actual substance. (It's still water just in a different form.) MLZ Carpenter, Ph.D.
The most important thing for your to remember is that in a physical change the composition of a substance does not change and in a chemical change the composition of a substance does change.
The comparative form of "clearly" is "more clearly," and the superlative form is "most clearly." These forms are used to compare the clarity of actions or statements among two or more subjects. For example, you might say, "She explained it more clearly than he did," or "He explained it most clearly of all."
This is an example of a change in the physical states of Matter. These states-of-Matter are: Solid, Liquid, Gas and the Newest and Latest and most energetic State - Plasma. Frost is a special 'case' because it does not Condense [vapor to liquid], it Sublimes - water [in this case] vapor crystallizing [directly] to the Solid - bypassing the liquid phase.
Male or Female
"The answer is clear to me."
Dissolving is considered by most to be a physical change.
B