tailieunhanh - Lecture Science 1 - Associate Degree in Education: Lecture 26 - Dr. Arshad Bashir
Lecture 26 - Properties of matter. In this chapter, by the end of this unit, Students should recognize that the observable properties of matter result from atomic-level interactions. They start the unit by reviewing the distinctions between substances and mixtures. Most important, they focus on the concept that mixtures can be separated by physical means, but substances cannot. They learn that each substance has a characteristic set of chemical and physical properties, which leads to the idea that substances differ at the atomic level. | Lecture # 26 SCIENCE 1 ASSOCIATE DEGREE IN EDUCATION PROPERTIES OF MATTER Chemistry? Why is it necessary to teach chemistry at elementary and secondary level? What are some of the elements you want to teach? What are the issues in teaching chemistry? In what ways chemistry is different from other natural sciences? Overview By the end of this unit, Students should recognize that the observable properties of matter result from atomic-level interactions. They start the unit by reviewing the distinctions between substances and mixtures. Most important, they focus on the concept that mixtures can be separated by physical means, but substances cannot. They learn that each substance has a characteristic set of chemical and physical properties, which leads to the idea that substances differ at the atomic level. Overview continue Students learn about the modern model of the atom, which can be taught in the context of historical models. They are then introduced to the periodic table and its organization. The primary focus is on understanding the organizational structure of the periodic table. They should also be able to apply the periodic table to identify trends in the properties of the atoms. The model of the atom will be used as an example of working with models in science. Students will be introduced to the idea of using models in science classes to foster their understanding. In addition, they will realize the limitations of models and the potential for misconceptions. They also explore in depth the different types of bonds that atoms form and how atoms and molecules interact in chemical reactions to form new compounds with new properties. Overview continue For Teachers to teach these concepts on matter successfully in the elementary grades, they must have a detailed discussion about state of matter, buoyancy, and density. Many misconceptions in this area stem from wrong ideas being developed in early science classes. They can be best prevented by carefully scaffolding the learning experience for elementary school children. The third week of this unit develops and deepens this kind of pedagogical content knowledge. Overview continue Learning outcomes Differentiate between physical and chemical properties of matter Classify chemicals as pure substances or mixtures (homogenous or heterogeneous) and classify pure substances as elements or compounds Identify atoms and molecules as the building blocks of elements, compounds, and mixtures Explain the atomic structure, addressing parts and properties of the atom Analyze the relationship between the structure and the properties of matter, focusing on chemical properties of elements and their placement in the periodic table Learning Outcomes continue . Explain how substances change from one state to another by heating or cooling Describe a model of the atom and what it depicts as well as its limitations Begin explaining their misconceptions about properties and particle theory and what to do about them Begin identifying the underlying core science concepts in this unit for children in elementary grades Design inquiry-based activities and learning outcomes that are age appropriate Begin developing learning progressions. Essential core vocabulary Substance, Matter, Particle, Mixture, Element, Compound, Molecules, Atoms, Physical and chemical property
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