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Module Objectives
Module Objectives
1) Identify ways scientists classify matter
2) Describe the difference between pure substances and mixtures
3) Explain what is matter
4) List examples of various types of matter (element, compound, homogeneous mixture, heterogenous mixture)
5) Create a flowchart that shows the organization of matter
6) Explain how particle size affects the type of mixture
Key Learning Activities
Key Learning Activities
Matter is anything that has a mass (the amount of stuff in an object, usually measured in grams) and takes up volume (the amount of space the object takes up, usually measured in liters)
Matter can be classified as either a pure substance or a mixture
Pure substances are objects that only contain one specific type of object inside a sample -- (NO IMPURITIES)
(ex. sugar, aluminum metal, diamond, 24 karat gold)
Pure substances can be divided into two types:
Elements -- the building blocks of matter (think Periodic Table)
(ex. gold [Au], oxygen [O], sodium [Na])
Compounds -- 2+ elements that have CHEMICALLY combined together
(ex. H2O [water], NaHCO₃ [baking soda], NaCl [salt])
Mixtures can be divided into several types (divided mainly by particle size):
Heterogeneous -- the mixture is not "blended smoothly"; you can see the particles
Suspensions -- has largest particle size; particles will "settle out" if you leave it in container
(ex. Italian dressing, milk of magnesia, paint)
Homogeneous -- the mixture is "blended smoothly"; you will not be able to see the particles
Colloids -- has medium particle size; particles may not "settle out" if you leave it in container
(ex. Jell-o, ketchup, whole milk)
Solutions -- has small particle size; particles will not "settle out" if you leave it in container
(ex. salt water, Kool-Aid, coffee)
Mixtures can be separated by various ways (see physical changes for details)
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