STRUCTURE AND PROPERTIES OF MATTER
Iowa Core Content Standard Correlation:
HS-PS1-3. Plan and conduct an investigation to gather evidence to compare the structure of substances at the bulk scale to infer the strength of electrical forces between particles.
Learning Expectations:
The student is expected to plan and conduct an investigation to gather evidence to compare the structure of substances to infer the strength of intermolecular forces between particles.
Disciplinary Core Ideas:
The structure and interactions of matter at the bulk scale are determined by electrical forces within and between atoms.
Attraction and repulsion between electric charges at the atomic scale explain the structure, properties and changes of matter.
Minds on Chemistry (MOCs)
MOC 1: Critical Reading *
MOC 2: Section 12-3 *
MOC 3: Physical Properties
MOC 4: Inter-and Intra-molecular Forces *
MOC 5: Surface Tension
MOC 6: Viscosity
MOC 7: Physical Changes
MOC 8: Phases of Matter *
MOC 9: Phase Changes
MOC 10: Heating/Cooling Curves *
MOC 11: Phase Diagrams
MOC 12: Miscibility
MOC 13: Density *
MOC 14: Mixtures
MOC 15: Soap and Shampoo *
MOC 16: Vapor Ramp. * Will do together!
MOC 17: ACT Prep (Melting and Boiling Points)
MOC 18: ACT Prep (Boiling Points)
MOC 19: Main Ideas
MOC 20: Jeopardy
8.1. Physical Properties and phases are determined by the intermolecular forces present between molecules in a substance.
Objectives:
(a.) Understand that a substance's structure and physical properties are determined by the inter- and intra-molecular forces present.
(b.) Determine the identity of an unknown substance based on its physical properties (density, boiling point and solubility)
(c.) Explain and model the role of intermolecular forces in determining the physical phase (state), melting and boiling points of a substance.
(d.) Describe and model why liquids have surface tension and different viscosities.
Lesson Sequence/Links:
Labbook: Inter- v. Intra- molecular Forces
Lab/Claim: What is the identity of the unknown liquid?
Lab/Claim: Which liquid has the strongest intermolecular forces?
Labbook: Surface Tension
Labbook: Viscosity
Labbook: Phases of Matter
8.2. Matter undergoes a physical change when thermal energy is used to affect intermolecular forces.
Objectives:
(e.) List and model examples of physical changes.
(f.) Describe the role thermal energy and intermolecular force strength have in physical changes.
(g.) Create and interpret heating/cooling curves and phase change diagrams.
Lesson Sequence/Links:
Claim/Labbook: Heating/Cooling Curve
Labbook: Phase Changes
Phet: States of Matter
8.3. A mixture is a physical combination of two or more substances.
Objectives:
(h.) Determine the sugar quantity of various beverages using a calibration curve.
(i.) List examples of and provide particle models of non-mixtures, heterogeneous mixtures and homogeneous mixtures.
(j.) Summarize and model how soaps work to remove dirt and grease.
(k.) Summarize and model why substances are and are not miscible.
Lesson Sequence/Links:
Claim/Labbook: Beverage Density
Labbook: Mixtures
Labbook: Soap
Claim/Labbook: Misiciblity