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Earth Materials Recommended for Third Grade Curricular Resource Used: Earth Materials Full Option Science Systems (FOSS) Published by Delta Education Description of the Module: The Earth Materials unit consists of four investigations where students gain first hand experience and knowledge about twelve of the most common rocks and minerals on Earth. Students learn that rocks are composed of minerals whereas minerals are the same substance throughout. Students then classify minerals and rocks according to properties such as color, hardness, and chemical reactions. Earth Materials Big Ideas The earth is made up of non-living materials that can be described and identified by their physical properties. The physical properties determine the uses for the earth materials. The properties of earth materials can undergo changes that can result in a modification of some of the physical properties. Earth Materials Major Concepts A rock is an earth material composed of different ingredients called minerals. An earth material has properties that can be observed, such as, color, shape, texture, and luster. Hardness, a mineral property, is the resistance of a mineral to being scratched. Some materials, such as salt and alum, dissolve when they are mixed with water but reform when the water evaporates. Higher Order Thinking Questions You are given an unknown earth material. What tests will help you to learn more about it? Develop a chart to record your test data and observations. (Calcite test, hardness, evaporation test, color, luster, texture tests.) What would be a good use of an earth material like granite? (A statue as it is hard, durable, and attractive). Describe the difference in the physical properties between a sedimentary rock like limestone and a metamorphic rock like marble. (Limestone is layered, grainy, sandy, and soft and marble is hard, attractive, and a good building product.) Delaware Science Coalition Professional Development Coalition Professional Development Hours: 15 Mini Course Hours: 6 Professional Development Product Requirements: Three-page reflection paper