Wake-up Answer the following questions regarding the statement below: Lemon trees receiving the most water produce the largest lemons. 1.Identify the dependent variable. 2.Identify the independent variable. 3.List 3 constants for this experiment. Properties of Matter What is meant by a property? A property describes how an object looks, feels, or acts. What are some properties of the fish below? Other properties: The fish take up space and have mass; therefore have matter Everything is made up of matter: MATTER 1. Has mass2. Takes up space Physical Property of Matter Properties that are observed or measured without changing the composition of matter Intensive Properties Does not depend on the matter present Ex. Color, Odor, Luster, Conductivity Extensive Properties Depends on amount of matter present Ex. Mass, Weight, Length, Volume Physical change Properties change but composition does not Evidence of Physical Changes Melting, freezing, boiling, breaking, splitting, grinding State of Matter: SolidSolid Particles locked into place; particles do not flow easily Fixed (set) shape and volume State of Matter: Solid Ice State of Matter: LiquidLiquid Assumes the shape of the container in which it is placed; particles can move/slide past one another Fixed (set) volume and unfixed shape State of Matter: Liquid Water State of Matter: GasGas Assumes the shape and volume of the container in which it is placed; particles move freely Unfixed shape and volume State of Matter: Gas Water vapor Why are all of these changes occurring? Addition of Energy Melting, freezing, boiling, etc Chemical Property of Matter The "potential of matter to undergo some chemical change or reaction due to its composition Chemical change Composition changes; irreversable Evidence of a Chemical Change ECPIG E=Energy, C=Color, P=Precipitate, I=Irreversible, G=Gas Physical vs. Chemical Change Inside a Party Popper Classification of Matter 1. Pure substance: Matter that has constant composition; can only be separated by chemical reactions (element/compounds) Classification of Matter 2.Mixture: Matter that contains more than one substance; can typically be separated by physical methods Homogeneous Mixture Having visibly (to the naked eye) indistinguishable parts; Mixed completely Kool-Aid is a Solution; mixture of solvent and solute Heterogeneous Mixture Having visibly distinguishable parts