Physical and Chemical Changes

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Physical and Chemical Changes

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Presentation transcript:

Physical and Chemical Changes utah.agclassroom.org

Physical Change Physical change is a change that does not change the identity of the substance. Examples include: >Melting ice >Freezing Kool-Aid >Tearing paper >Boiling water

Chemical Change Chemical change is a change that causes the identity of the substance to change. Examples include: >Burning wood >Digesting food >Potassium reacting with water A chemical change can also be called a chemical reaction.

Indicators of a Chemical Change Indicators of a chemical change can include: >Light is produced >Heat is either absorbed or produced >Gas is produced >There is a change in color >Formation of a precipitate (a solid in a liquid)

Is it a Physical or a Chemical Change Type of Change Physical Chemical Melting ice Burning wood Souring milk Wadding up paper Rusting metal Cornstarch and water Corn plastic Adapted from: www.dpi.state.nc.us/docs/curriculum/science/units/.../8unit2pt2.ppt