Unit 3 Lesson 3 Physical and Chemical Changes
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| A ___ property of matter is any property taht can be observed or measured without changing the chemical identity of the substance. | Physical
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| A __ is a change that affects one or more physical properties of a substance. | Physical Change
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| ___Changes occur when a substance changes from one form to another, but the chemical identity of the substance remains the same. | Physical
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| The appearance, ___ or size of a substance may be altered during a physical change. | Shape
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| Stretching a rubber band is an example of a ___. | Physical change
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| Dissolving sugar in water is an example of a ___. | Physical change
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| Cutting your hair is an example of a physical change. True or False | True
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| A ___ occurs when one or more substances change into entirely new substances with different properties., | Chemical change
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| True or False: Chemical changes are not exactly the same as chemical properties. | True
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| Chemical changes are the __ by which substances actually change into new substances. | Process
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| Chemical changes involve changes in the arrangements of particles and are often influenced by ___. | Temperature
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| How are physical and chemical changes different? | Chemical changes result in new substances. Physical changes do not result in new substances.
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| True or false: Chemical changes often cause fizzing or foaming. | True
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| Water boiling is an example of a ____ change. | Physical
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| Soured milk is an example of a ___ change. | Chemical
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| When a chemical change occurs and liquids combine to form a solid it is called a ___. | Precipitate
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| Chemical changes can cause energy to change from one form into another. An example is a burning candle, the chemical energy stored in the candle converts to ___ and ___ energy. | heat and light
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| The French chemist ____ studied chemical changes in which substances seemed to lose or gain mass. | Antoine Lavoisier
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| Anotine Lavoisier studied chemical changes and first demonstrated the law of conservation of mass that states ___. | In an ordinary chemical and physical changes, mass is not created or destroyed. Mass is only transformed into different substances.
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| The law of conservation of mass is also called the law of ___ | Conservation of matter
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| The law of ___ states that energy cannot be created or destroyed. Energy can only change from one form to another. | Conservation of energy
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| Changes that ABSORB energy are called __. | Endothermic
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| Changes that release energy are called __. | Exthermic
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