3 Matter Chemistry is the study of matter and how it changes Matter is anything that has mass and occupies space
4 Classifying MatterOrganize the items on your desk into groups based on what you know about them.
5 September 11, 2009 Obj – Understand Matter Warm-Up – Differentiate between a pure substance and a mixture.Reminders – Matter Quiz on Monday
6 Classifying Matter – Concept Map Prepare a concept map showing the relationships among the following terms and the items in front of you.Include these terms in your concept maps:Compound, Element, Heterogeneous, Matter, Mixture, Homogenous, Pure substance, Solution
7 Pure SubstancesPure Substances: matter with a fixed definite composition with exact definite properties. (example: distilled water)ElementsCompounds
8 Pure Substances: Elements Elements - substances that cannot be broken down into simpler substances (pure)Atoms – smallest unit of an element that still retains its properties.
9 Pure Substance: Compounds Compounds -made of atoms of more than one element that have bonded together chemically (Example: Salt)Molecules are the smallest unit of a compound
10 MixturesThe properties of a mixture can vary because the composition of a mixture is not fixed.Mixtures can retain some of the properties of their individual substances.The properties of a mixture are less constant than the properties of a substance.
11 Heterogeneous and Homogeneous Mixtures Homogeneous mixture = a mixture that contains more than one type of matter and is the same throughout.Heterogeneous mixture = a mixture that contains more than one type of matter and is not the same throughout
12 September 14, 2009 Obj – Explore separating matter Warm-Up – What types of matter can be separated and why? What types of matter cannot be separated?Reminders – Quiz today, CE due Friday
13 Solutions, Suspensions and Colloids Based on the size of its largest particles, a mixture can be classified as a solution, a suspension, or a colloid.Solution: when substances dissolve and form a homogeneous mixture, the mixture that forms is a solution. Sugar in waterSuspension – a heterogeneous mixture that separates into layers over time. Ex. Sand and waterColloid – a combination of small particles that do not separate as in a solution and larger particles that do separate as in a suspension. Ex. Milk, it will separate over time.
16 Separating MixturesFiltration – separates mixtures on the basis of particle size. Ex. Using a coffee filter to separate the ground coffee from the water when making a cup of coffee. Distillation – separates a mixture in a solution by boiling points. Ex. Evaporating the water from salt water separates the salt from the water leaving the salt behind.