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Grade 3 |
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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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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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A. Structure of Matter
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1. Cite evidence from investigations that most things are made of parts.
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1. Identify ways to classify objects using supporting evidence from investigations of observable properties.
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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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a. Classify objects based on their observable properties.
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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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b. Provide reasons for placing the objects into groups.
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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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c. Compare classifications with those of others.
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2. Identify and describe structures of objects too small to be seen clearly with the unaided eye.
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a. Identify and describe minute objects, such as grains of sand and crystals of salt after examining them with a magnifying instrument.
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b. Identify and describe the minute features of objects, such as the lines (grain) in a piece of wood and the fibers in a paper napkin after examining with a magnifying instrument.
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B. Conservation of Matter
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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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C. States of Matter
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1. Provide evidence from investigations to describe the effect that changes in temperature have on the properties of materials.
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a. Based on data gathered from investigations, identify and describe the changes that occur to the observable properties of materials when different degrees of heat is applied to them, such as melting chocolate pieces, boiling an egg.
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b. Observe and describe the changes cooling causes to the observable properties of materials when they are cooled, such as freezing water in a straw, milk in an ice cream maker.
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c. Cite examples of similar changes that heating and cooling have on the observable properties of various other materials.
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D. Physical and Chemical Changes
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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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