2 What does it mean to classify? …to sort or organize into groups based on similar characteristics or properties…
3 Examples of how we classify every day things StarsBooks (Dewey Decimal System)Swahili nounsMusical instrumentsLiving things
4 What is MATTER?Anything that…has MASStakes up SPACE
5 Properties of Matter Examples of physical properties: colorshapetexturehardnessdensitysolubilityductilitymalleabilityExamples of chemical properties:combustibilityflammabilityreactivity to acidtendency to rust
28 Types of Mixtures Solution one substance is dissolved in another homogeneousdissolving substance = SOLVENTdissolved material = SOLUTE
29 Types of Mixtures Alloys Examples: mixture of 2 metals usually homogeneousExamples:steel = iron + carbonbrass = zinc + copperbronze = copper + tin
30 Types of Mixtures Suspension Colloid a mixture which will separate when undisturbed (particles will settle out)heterogeneouse.g. dust particles in air; sand in waterColloida mixture between a solution and a suspension (particles don’t settle out)e.g. fog and milk
31 Types of Mixtures Other types: Can you think of others? Emulsion (e.g. mayo)Gel (e.g. jelly)Can you think of others?