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Standard 4.0 Chemistry: Students will use scientific skills and processes to explain the composition, structure, and interactions of matter in order to support the predictability of structure and energy transformations.
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A. Structure of Matter
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1. Cite evidence from investigations that most things are made of parts.
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a. Examine a variety of objects, such as toys, objects made from Legos or Tinker Toys to identify and describe the parts from which they are made.
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b. Take objects apart and rearrange the parts to identify and describe the ways the parts work together.
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c. Ask and seek answers to "What if" questions about the changes made to the objects and how they affect the way objects work, for example, if a part were left out of the object would it make a difference in how the object works?
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B. Conservation of Matter
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1. Provide evidence from investigations that things can be done to materials to change some of their properties.
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a. Based on evidence from investigations describe that materials, such as clay are not changed by certain actions, such as reshaping or breaking into pieces.
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b. Ask and seek answers to questions about what happened to the materials if other things were done to them, such as being placed in a freezer, heated, etc.
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C. States of Matter
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D. Physical and Chemical Changes
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1. Provide evidence from investigations to identify processes that can be used to change physical properties of materials.
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a. Based on investigations, describe what changes occur to the observable properties of various materials when they are subjected to the processes of wetting, cutting, bending, and mixing.
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b. Compare the observable properties of objects before and after they have been subjected to various processes.
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c. Ask and seek answers to "What if" questions about what might happen to the materials if different processes, such as heating, freezing, and dissolving were used to change them.
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