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38 Cards in this Set
- Front
- Back
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Matter
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- anything that has mass & takes up space
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Chemical Change (3)
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- process by which a substance becomes a new & diff substance
- change that occurs due to chemical reaction - substance changes |
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Physical Change (3)
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- changes of energy/states of matter
- changes that occur due to physical action - substance is still the same |
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Molecules (2)
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- structure made up of 2/more atoms combined
ex - H₂0 |
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Solutions (2)
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- homogenous mixture in which 1 substance is dissolved in another
ex - Kool Aid |
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Mixtures (2)
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- matter that consists of 2/more substances mixed, but NOT chemically combined
ex - trail mix |
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Elements (3)
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- simplest type of pure substance
ex - oxygen - hydrogen |
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Chemistry
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- the study of matter and their interactions
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Atoms
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- smallest particle of an element that has all the properties of that element
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Volume
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- amount of space an object takes up
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Weight
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- measure of the force of gravity on an object's mass
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Mass
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- amount of matter in an object
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Specific Properties of Matter (6)
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- color
- odor - size - shape - texture - hardness |
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General Properties of Matter (4)
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- mass
- weight - volume - density |
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Formula for Density
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Mass
Density = ______ Volume |
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Solids (4)
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- definite shape
- definite volume - particles are closest in this phase - particles vibrate in place |
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Liquids (4)
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- no definite shape (takes shape of container)
- definite volume - particles are farther apart than in a solid, but closer than in a gas - move around |
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Gases (5)
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- no definite shape
- no definite volume - particles are farther apart than in solid/liquid - molecules move around quickly - gas will fill all space in a container regardless of container |
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Solid -> Liquid (3)
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- addition of energy
- melting ex - ice cream melting on hot day |
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Melting
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- the change of a solid -> a liquid
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Melting Point
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- temp at which melting occurs
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Liquid -> Solid (3)
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- removal of energy
- freezing ex - water -> ice cubes |
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Freezing
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- change of liquid -> solid
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Freezing Point
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- temp at which freezing occurs
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Liquid -> Gas (3)
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- addition of energy
- vaporization/evaporation/boiling ex - water boiling |
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Vaporization
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- change of a substance from liquid -> gas
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Evaporation
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- when vaporization takes place at surface of liquid
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Boiling
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- process in which particles inside & on the surface of liquid change -> gas
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Boiling Point
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- temp at which boiling occurs
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Gas -> Liquid (3)
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- removal of energy
- condensation ex. - water droplets forming around cup of iced drink |
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Condensation
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- change of substance form gas -> liquid
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Chemical Properties
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- properties that describe how a substance changes into other new substances
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Chemical Change (NB)
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- changes that occur during the process by which a substance changes into another substance
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Chemical changes occur during ____________ _____________.
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- chemical reactions
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Chemical reactions involve...
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- chemically combing different substances
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How are chemical changes different from physical changes?
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- physical change:
substance remains same - chemical change: the products are new/different substances |
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Examples of Chemical Properties (3)
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- flammability
- reactivity - supports combustion - radioactivity- - valence - pH |
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Examples of Physical Properties (5)
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- color
- odor - freezing point - melting point - density |
