10 examples of physical change
Answers
Answer:
Examples of Physical Changes:
- Crushing a can.
- Melting an ice cube.
- Boiling water.
- Mixing sand and water.
- Breaking a glass.
- Dissolving sugar and water.
- Shredding paper.
- Chopping wood
- Mixing flour, salt, and sugar
- Mixing water and oil
Answer:
Physical changes involve states of matter and energy. No new substance is created during a physical change, although the matter takes a different form. The size, shape, and color of matter may change. Physical changes occur when substances are mixed but don't chemically react.
How to Identify a Physical Change
One way to identify a physical change is that such a change may be reversible, especially a phase change. For example, if you freeze water into an ice cube, you can melt it into the water again. Ask yourself:
Is the change reversible? Not all physical changes are easy to reverse.
Was there a color change (with exceptions), bubble formation, or formation of a precipitate? These are all signs of a chemical change, not a physical change.
Is the chemical identity of the end product the same as it was before the change? If the answer is yes, it's a physical change. If the answer is no, it's a chemical change.
Examples of Physical Changes
Remember, the appearance of matter changes in a physical change, but its chemical identity remains the same.
Crushing a can
Melting an ice cube
Boiling water
Mixing sand and water
Breaking a glass
Dissolving sugar and water
Shredding paper
Chopping wood
Mixing red and green marbles
Sublimation of dry ice
Crumpling a paper bag
Melting solid sulfur into liquid sulfur. This is an interesting example since the state change does cause a color change, even though the chemical composition is the same before and after the change. Several nonmetals, such as oxygen and radon, change color as they change phase.
Chopping an apple.Mixing salt and sand
Filling a candy bowl with different candies
Vaporizing liquid nitrogen
Mixing flour, salt, and sugar
Mixing water and oil.