Physical Change

By: Maria Fontana and Gianna Tufano

What is a Physical Change?

A physical change is changing from one state of matter (solid, liquid or gas) to another state of matter without changing the chemical composition. During a physical change, a material keeps its identity. Physical changes are reversible; whereas, chemical changes are not.

Physical Change vs. Chemical Change Video

The video below explains the difference between physical changes and chemical changes. We chose this video because it is an educational video that would help our classmates get a better understanding of physical changes.

Physical Change Example of Water into Ice

An example of a physical change is freezing water. This is a physical change because the water is changing its state of matter from a liquid to a solid. However, there is no change to the chemical composition because the chemical composition of water and ice are both H20. We can reverse this physical change by melting the ice. Then, the ice will become a liquid again.

How Can You Cause a Physical Change?

You can cause a physical change by changing the appearance of the substance without changing the chemical makeup. An example of causing a physical change is cutting wood.

Another example of causing a physical change is cutting a piece of paper in half. Lastly, another example is adding sugar to coffee. The sugar dissolves into the coffee liquid.