Physical and chemical changes
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Created by:
pinkpuff123 on February 11, 2012
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6 terms
Terms | Definitions |
|---|---|
 What is a physical change? | During a physical change, a substance changes in form but not in its chemical composition. No new substances are formed. |
| What is a physical change? | Ice melting is an example of a physical change. Some of the properties of liquid water and are different from the properties of solid water. |
| What is a chemical change? | A chemical change causes one or more new substance to be formed. Burning paper is an example of a chemical change. |
| How can you tell if a change is chemical? | Some chemical changes are easy to observe. When fireworks explode, energy is released in the form of heat, light, and sound. |
| Chemical changes. | Heat is produce or absorbed, one or both reactants are used up, there is a change in colour, gas bubble form in liquid. |
| How is energy involved with physical and chemical changes? | All changes in matter involve changes in energy. Energy is either released or absorbed. The energy is often in the form of heat, but it also may be in the form of sound or light. |
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