C.1.1 Differentiate between Identify and explain why a sample that Pure substance composed of only one type Patterns – pure substances and mixtures has multiple elements (water) can be of particle (compound or element) Structure and Function based on physical and chemical pure (depending on the sample, not tap Mixture sample of two or more pure – properties. water). substances where each material maintains its own properties Students are able to identify physical and Physical property aspect of matter that can – chemical properties in the laboratory. be observed or measured without changing the chemical composition of the sample Separate mixtures using physical and Chemical property any property of matter – chemical properties. that may only be observed and measured by performing a chemical change or chemical reaction. C.1.2 Use chemical properties, Identifying various compounds and Chemical properties any property of matter Patterns – extensive, and intensive physical elements based on their chemical that may only be observed and measured by Structure and Function properties to identify properties (flammable, oxidizer, etc.) performing a chemical change or chemical substances. extensive (mass, volume, etc.) and reaction. intensive physical properties (density, Extensive properties dependent on the – hardness, color, melting point, odor, amount of matter that is present in a sample etc.). Intensive properties do not depend on the – amount of matter present in a sample Extensive properties of mass and Physical properties aspect of matter that – volume can be used to calculate density can be observed or measured without (intensive) to help identify the changing the chemical composition of the substance. sample Substances a material with a definite – Extensive properties alone are not chemical composition useful in the identification of a substance. C.1.3 Recognize observable Use the indicators of energy macroscopic indicators observations made Energy and matter – macroscopic indicators of released/absorbed during a by the naked eye chemical changes. reaction(heat, light, sound), gas production, precipitate formation, or chemical changes the making and/or – color change to justify whether a breaking of chemical bonds resulting in the chemical reaction occurred or if there formation of new chemical substances was just a physical change.
C.1.1 Differentiate between pure substances and mixtures based on physical and chemical properties. Identify and explain why a sample that has multiple elements (water) can be pure (depending on the sample, not tap water). Students are able to identify physical and chemical properties in the laboratory. Separate mixtures using physical and chemical properties. Pure substance – composed of only one type of particle (compound or element) Mixture – sample of two or more pure substances where each material maintains its own properties Physical property – aspect of matter that can be observed or measured without changing the chemical composition of the sample Chemical property – any property of matter that may only be observed and measured by performing a chemical change or chemical reaction. Patterns Structure and Function C.1.2 Use chemical properties, extensive, and intensive physical properties to identify substances. Identifying various compounds and elements based on their chemical properties (flammable, oxidizer, etc.) extensive (mass, volume, etc.) and intensive physical properties (density, hardness, color, melting point, odor, etc.). Extensive properties of mass and volume can be used to calculate density (intensive) to help identify the substance. Extensive properties alone are not useful in the identification of a substance. Chemical properties – any property of matter that may only be observed and measured by performing a chemical change or chemical reaction. Extensive properties – dependent on the amount of matter that is present in a sample Intensive properties – do not depend on the amount of matter present in a sample Physical properties – aspect of matter that can be observed or measured without changing the chemical composition of the sample Substances – a material with a definite chemical composition Patterns Structure and Function C.1.3 Recognize observable macroscopic indicators of chemical changes. Use the indicators of energy released/absorbed during a reaction(heat, light, sound), gas production, precipitate formation, or color change to justify whether a chemical reaction occurred or if there was just a physical change. macroscopic indicators – observations made by the naked eye chemical changes – the making and/or breaking of chemical bonds resulting in the formation of new chemical substances Energy and matter
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