Physical and Chemical Changes Physical and Chemical Properties Everything around us has physical and chemical properties Physical Properties Characteristics you can observe without changing the substance into something new ID: 771460
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Physical and Chemical Changes
Physical and Chemical Properties Everything around us has physical and chemical properties.
Physical Properties Characteristics you can observe without changing the substance into something new. Use your senses to describe state of matter measurement
Use your senses… How does it look, smell, sound, feel, taste (don’t taste it unless the teacher says it’s ok)
What state of matter is it? (solid, liquid, or gas)
Measure it….mass, weight, volume, length, width, height, density, temperature, magnetic?
Physical Properties List as many physical properties as you can Color Temperature Feel Smell State Weight Length Density
Chemical Properties Will it burn, explode, react with other elements? Characteristics that you can only observe by changing the substance into something new. You can’t always tell chemical properties just by looking
Chemical Properties List as many chemical properties as you can Will it burn Will it explode Can it react with other things
Physical and Chemical Changes Matter around us can undergo changes. Physical Changes Chemical Changes
Physical Change A change in which the state or energy level of something changes but not its chemical composition Change of state Change of shape Dissolving
Physical Changes changing state melting – solid to liquid condensation – gas to liquid freezing – liquid to solid sublimation – solid to gas vaporization – liquid to gas deposition – gas to solid
Changes in States
Physical Changes change of shape Matter can change shape cutting chewing grinding crumpling bending
Physical Changes dissolving When you mix or dissolve one thing into another, it is a physical change
Chemical Change A change in which the composition of matter changes and new substances are formed. Chemical bonds are formed and broken. It cannot be turned back into the original substance
Chemical Change Signs that a chemical change may have taken place Color change Absorption or release of energy Odor Formation of gases or solids Can’t be reversed
Chemical Changes Iron + oxygen and water = rust silver + oxygen and water = tarnish
Chemical Changes Burned wood Cooked food
Chemical Changes Digestion Spoiled food
Chemical Changes Lightning bug Antacid tablet
Physical or Chemical Copper jewelry Statue of Liberty orange Orange juice Orange cake copper Physical Chemical Physical Chemical