Unit 2 Test Content
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Matter breaks down into … and …
substance and mixture
Substance breaks down into … and …
element and compound
Mixture breaks down into … and …
homogeneous mixture and heterogeneous mixture
can’t be separated into different kinds of matter by physical means
substance
can’t be broken down into simpler substances by chemical or physical means
element
contains two or more different elements chemically joined
compound
contains a combination of different elements and compounds and can be separated by physical means
mixture
a mixture that is the same throughout
homogeneous mixture (solution)
a mixture in which different samples are not necessarily made up of exactly the same proportions of matter
heterogeneous mixture (mixture)
examples of elements
pure gold and copper
examples of compounds
water (H2O) and salt (NaCI)
examples of homogeneous mixtures
salt water, coffee, soil
examples of heterogeneous mixtures
trail mix and fruit salad
a … curve goes up
heating
a … curve goes down
cooling
What’s the order in which a heating curve goes up?
1.) Solid 2.) Melting (PC) 3.) Liquid 4.) Boiling (PC) 5.) Gas
What’s the order in which a cooling curve goes down?
1.) Gas 2.) Evaporation (PC) 3.) Liquid 4.) Freezing (PC) 5.) Solid
solid to liquid
melting
solid to gas
sublimation
liquid to solid
freezing
gas to liquid
condensation
liquid to gas
evaporation
occurs between 2 materials at different temperatures when they are in direct contact
conduction
vertical movement of fluids due to temperature differences
convection