unit 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| matter is described using properties that are | extensive or intensive
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| extensive properties | property that depends on the amount ex. volume
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| intensive properties | property that doesn't depend on amount ex. density
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| all matter can be divided into | substances and mixtures
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| substance | uniform and definite composition
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| substances can be classified as | elements or compounds
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| element | simplest form of matter with unique set of properties
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| compound | 2 or more elements chemically combined in fixed ratios
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| mixture | physical blend of 2+ compounds
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| heterogenous mixture | composition not same ex. chicken noodle soup
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| homogenous mixture | aka solution; composition same throughout ex. alloys and salt
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| mixtures can be seperated | physically
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| filtration | solid from liquid
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| distillation | liquid from liquid or solid
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| physical property | doesnt change nature of sample
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| physical change | composition of material doesn't change
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| physical changes don't involve | chemical reactions
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| in physical changes there is no breaking or forming | chemical bonds
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| chemical property | ability of a substance to undergo chemical reaction
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| chemical change | composition of matter will always change
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| signs of chemical change | transfer of energy, color change, gas production, formation of precipitate
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| law of conservation of mass | mass isn't created or destroyed only transformed
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| all states of matter changes are | physical
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| intermolecular forces | forces BETWEEN individual molecules; strong by numbers, contribute to physical changes
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| intramolecular forces | forces WITHIN a specific individual molecule, very strong by themselves, contributes to chemical changes
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| states of matter | solid, liquid, gas, plasma
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| solid | definite shape, definite volume, incompressable, partcles tighly packed- ordered, vibrations (not fluid)
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| liquid | indefinite shape, definite volume, incompressable, particles in contact but disorderky packed, particles flow (fluid)
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| gas | indefinite shape, indefinite volume, highly compressable, particles far apart, little contact, collision, particles flow (fluid)
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| gas particles | lots of space between, rapid motion, exerts pressure=billions of collisions, spontaneously expands
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| earth is __% nitrogen | 78%
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| earth is __% oxygen | 20%
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| earth is __% water | 1%
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| endothermic | requires heat
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| exothermic | releases heat
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| melting | solid to liquid, endothermic, particles have enough energy to begin to flow, melting point- temp when liquid forms
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| freezing | liquid to solid, exothermic, particles lose energy and slow down, freezing point temp when solid forms
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| boiling | liquid to gas, endothermic, particles have enough energy to break away, boiling point temp when gas forms
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| condensation | gas to liquid, exothermic, particles stick together, same as boiling pt
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| sublimation | solid to gas, endothermic, no liquied stage ex. dry ice
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| deposition | gas to solid, no liquid stage, exothermic ex. snowing
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
carolineeasley
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